how to solve this and answer

How To Solve This And Answer

Answers

Answer 1

After simplifying the equation, the chemist used 18 liters of 20% solution, 12 liters of 35% solution and 24 liters of 80% solution.

From the given question,

Let that chemist used x, y, z liters of 20%, 35% and 80% solution respectively.

Then according to the given information,

x+y+z=54..........(1)

As we know that in x liters having 20% acid, in y liters having 35% acid, in z liters having 80% acid and in total mixture having 50% acid.

So the equation should be

x ×20%+y×35%+z×80%=54×50%

On simplifying we get

20x+35y+80z=2700

4x+7y+16z=540...............(2)

As given that the number of 80% solution used in 2 times the number of liters of 35% solution used.

So z=2y

Now putting the value of z in equation (1)

x+y+2y=54

x+3y=54

Subtract 3y on both side

x+3y−3y=54−3y

x=54−3y

Now putting the value of x and z in equation (2)

4(54−3y)+7y+16×2y=540

Simplifying

216−12y+7y+32y=540

216+27y=540

Subtract 216 on both side

216+27y−216=540−216

27y=324

Divide by 27 on both side

27/27 y=324/27

y=12

Now putting the value of y in x=54−3y to find the value of x

x=54−3×12

x=54−36

x=18

Now putting the value of y in z=2y to find the value of z

z=2×12

z=24

Hence, the chemist used 18 liters of 20% solution, 12 liters of 35% solution and 24 liters of 80% solution.

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Related Questions

5/If AB is 12, what is the
length of A' B'?
B
3
40°
B'
A
2
6
A'
4
C

Answers

Answer:

8

Step-by-step explanation:

Corresponding sides of similar triangles are proportional, so:

[tex]\frac{A'B'}{12}=\frac{4}{6} \implies A'B'=8[/tex]

What are the answers to this ?! Help plsssss.

ONLY ANSWER IF YOU KNOW ! ANY OTHER ANSWERS WILL BE REPORTED.

Answers

We must combine 3 servings of Ta-sty Pocket, 2 serving of P-ita Roll, and 1 serving of In-sta Pancake to get 754 calories, 19.2 g of f-at, and 78.9 g of carbohydrates.

According to the question,

Three brands of breakfast food represents the calories , f-at, and carbohydrates.

To get 754 calories, we should combine

= 450 + 238 + 66

= 3 (150) + 2 ( 119) + 1 (66)

= 3 serving of Ta-sty Pocket + 2 serving of P-ita Roll + 1 serving of In-sta Pancake

To get 19.2g of f-at, we should combine

= 14.4 + 4.6 + 0.2

= 3(4.8) + 2( 2.3) + 1(0.2)

= 3 serving of Ta-sty Pocket +2 serving of P-ita Roll +1 serving of In-sta Pancake

To get 78.9 g of carbohydrates, we should combine

= 29.4 + 28 + 21.5

= 3(9.8) + 2( 14) + 1 (21.5)

= 3 serving of Ta-sty Pocket +2 serving of P-ita Roll +1 serving of In-sta Pancake

Hence, we should combine 3 serving of Tasty Pocket, 2 serving of P-ita Roll, 1 serving of In-sta Pancake

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Find the solution of this system of equations.
Separate the x- and y-values with a comma.
x = 10 + y
-3x + y = -28

Answers

We know that:

                      x = 10 + y

In the next equation {-3x + y = -28}  x is the same as the first, so:

-3(10 + y) + y = -28

-30 - 3y + y = -28

-30 - 2y = -28            

We add 30 to both sides:

-2y = 2

and divide both sides by (-2):

y = -1

Now we can put y = -1 to the first equation:

  x = 10 + y

  x = 10 - 1

   x = 9

So,

the solution of this system of equations is:                             (9, -1)


Greg collected cash donations for a local food bank as part of a service project. He collected
$400 altogether. He had expected to collect 37.5% less than that. How much money had
Greg expected to collect?

Answers

Answer:

$250

Step-by-step explanation:

He expected to collect 37.5% less than $400.

First, we find 37.5% of $400.

Then we subtract that amount from $400.

37.5% of $400 is:

37.5% of $400 = 0.375 × $400 = $150

Now, subtract $150 from $400:

$400 - $150 = $250

Answer: $250

Given the function f(x) = 3x2+2x+4, find f(−2). You must show at least 3 lines of work.

Answers

Solving for f(-2) in the function f(x) = 3x^2 + 2x + 4 gave the solution

f(-2) = 12

How to calculate for f(-2)

From the given function f(x) = 3x^2 + 2x + 4 we substitute for x = -2  which is same as function of -2

f(x) = 3x^2 + 2x + 4

pugging in x = -2

f(-2) = 3(-2)^2 + 2(-2) + 4

solving the squared and opening the parentheses

f(-2) = 3 * 4 + -4 + 4

f(-2) = 12 - 4 + 4

f(-2) = 12

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help me please , i dont kow what to type for this

Answers

The slope is a nice jacket with farmetly

Find the measure of angle x in the figure below: Two triangles are shown such that one triangle is inverted and they share a common vertex. The lower triangle has two angles at the base. The lower left angle is marked as 45 degrees. The lower right angle is marked as 55 degrees. The angle at the vertex of the inverted triangle at the top is marked as x degrees. The angle at the vertex of the bottom triangle is marked as y degrees. 45° 80°

Answers

The 45° and 55° base angles of the triangle that share a vertex with the inverted triangle that have the vertex angle (at the shared vertex) marked x, indicates that x is 80°

What is a shared vertex?

A shared vertex is a common point to two or more figures that is also a vertex to the figures that share the point.

The measure of the vertex angle of the triangle at the top which is inverted = x

The measure of the base angles of the triangle at the bottom are;

45° and 55°

The measure of the vertex angle of the triangle at the base = y

From the diagram of a similar question, angle x and angle y are vertical angles (angle x and angle y are formed by the intersection of two lines)

45° + 55° + y = 180° (angle sum property of a triangle)

The angle sum property of the interior angles of a triangle states that the sum of the interior angles of a triangle is 180°

y = 180° - (45° + 55°) = 80° (subtraction property of equality)

y = 80°

x ≅ y (vertical angles theorem)

x = y (definition of congruent angles)

x = 80° (substitution property of equality)

The measure of angle x is 80°

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Use the order of operations to evaluate 1 fourth + 1 third (10 − 1).

Answers

Answer:

[tex]\frac{13}{4}[/tex]

(Decimal: 3.25)

Step-by-step explanation:

Take a look at the attachment...

Hope this helps! :)

Answer:

5.25

Step-by-step explanation:

1/4+1/3(10-1)

*do what's in parenthesis first!*

10 - 1 = 9

1/4 + 1/3 = 7/12

then you multiply 7/12 x 9 = 5.25

DONT FORGET!

Please Excuse My Dear Aunt Sally

P  E M D A S

Jane and Jill collect yo-yos. The ratio of the number of Janes yo-yos to the number of JIlls yo-yos is 5:4. If jane will give 15 of her yo-yos to her little brother, Jane and Jill will have the same number of yo-yos in their collections. How many yo-yos do both girls have together?

Answers

Answer:

5u - 4u = 1u

1u = 15

9u = 135

∴ Both girls have 135 yo-yos together.

what is the prime factorization of 540
WHO EVER GETS IT RIGHT WILL GET TO BE THE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

540= 2x2x3x3x3x5

       or

540= [tex]2^{2}[/tex]x[tex]3^{3}[/tex]x5

Step-by-step explanation:

Complete the equation of the line through 6, -6 and 8,8

Answers

slope = m = (8 - (-6)) / (8 - 6) = 7

y = mx + b

y = 2x + b

plug in (8, 8) to find b

8 = 2(8) + b

b = -8

y = 2x - 8

Find the measure of angle L?

Answers

Answer:

C. 137

======================

Sum of interior angles of 6-sides polygon is:

S = 180(6 - 2) = 180*4 = 720

Set equation for the sum of interior angles and solve for x:

120 + 90 + 5x + 7x - 3 + 6x - 7 + 8x = 720200 + 26x = 72026x = 520x = 20

Find the measure of angle L:

7x - 3 = 7*20 - 3 = 140 - 3 = 137

Correct choice is C.

[tex]\underset{in~degrees}{\textit{sum of all interior angles}}\\\\ S = 180(n-2) ~~ \begin{cases} n=\stackrel{number~of}{sides}\\[-0.5em] \hrulefill\\ n=6 \end{cases}\implies S=180(6-2)\implies S=720 \\\\[-0.35em] ~\dotfill\\\\ (120)+(8x)+(6x-7)+\stackrel{\measuredangle L}{(7x-3)}+(5x)+\stackrel{\measuredangle O}{(90)}=720\implies 26x+200=720 \\\\\\ 26x=520\implies x=\cfrac{520}{26}\implies x=20~\hfill \underset{\measuredangle L}{\stackrel{7(20)~~ - ~~3}{\text{\LARGE 137}}}[/tex]

i need help bru dis is mh last try
What is the inverse of ƒ (x) = (2x + 1)² for x ≥ −½1⁄?

Answers

The inverse of the given function is (f^-1)(x) = (1/2)×(√x  - 1) for x ≥ 0.

We are given a function f(x). The function f(x) is defined as (2x + 1)². The domain of the given function f(x) is x ≥ -1/2. We need to find the inverse of the function f(x).

Let us suppose that the function f(x) is represented by the variable "y".

y = f(x)

y = (2x + 1)²

Now we will take the square root on both sides of the equation.

√y = √[(2x + 1)²]

When we cancel out the even powers, we need to take the absolute value using modulus.

√y = |2x + 1|

We already know that x ≥ -1/2, so, modulus will open with a positive sign.

√y = +(2x + 1)

√y = 2x + 1

√y  - 1 = 2x

x = (1/2)×(√y  - 1)

At last, we replace the variables y and x by x and (f^-1)(x).

(f^-1)(x) = (1/2)×(√x  - 1) for x ≥ 0

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In a discount clothing store, all sweaters are sold at one fixed price and all shirts are sold at another fixed price. If one sweater and four shirts cost $55, while four sweaters and five shirts costs $110, find the price of one sweater and the price of one shirt.

Answers

Answer:

Price of one shirt: $10Price of one sweater: $15

Step-by-step explanation:

The price of one sweater - x

The price of one shirt - y

From what the problem states, we can assume:

x + 4y = 55

4x + 5y = 110

Multiply both sides of x +4y = 55 by four. This results in 4x + 16y = 220. We then subtract 16y on both sides, resulting in 4x = 220 - 16y. We then insert this into the other equation, which, as a reminder, is 4x + 5y = 110. We replace 4x with 220 - 16y, which results in 220 - 16y + 5y = 110. Now, we can solve it.

220 - 16y + 5y = 110220 - 11y = 110110 - 11y = 0110 = 11yy = $10

Now that we have found out the value of y, we can replace all instances of y in the first equation.

x + 4y = 55x + 40 = 55x = $15

[tex]\sqrt{\frac{36}{\:81}}[/tex]

Answers

Answer:

2/3

Step-by-step explanation:

Since 6 *6 = 36 , the square root of 36 is 6

In other words:

[tex]\sqrt{36} \\= 6\\[/tex]

Since 9*9 = 81, the square root of 81 is 9

[tex]\\\/\sqrt{81}\\ = 9[/tex]

Now we have the fraction [tex]\frac{6}{9}[/tex]

Now we reduce [tex]\frac{6}{9}[/tex] to lowest terms:

[tex]\frac{6}{9 } = \frac{2}{3}[/tex]

Therefore, the answer is  [tex]\frac{2}{3}[/tex]

Hope this helps :)

Two triangles are shown in the figure. are the triangles similar, and why?​

Answers

Answer:Yes, the obtuse angles for both triangles are equailateral

Step-by-step explanation:

Which of the following is NOT a valid arrangement of 24 flowers?

Four rows of six flowers.
Two rows of twelve flowers.
Four rows of nine flowers.
Eight rows of three flowers.

Answers

I believe that the correct answer would be that Four rows of nine flowers :))

There are nine red marbles and five blue marbles in a bag what is the ratio of red marbles to blue marbles??? what is the ratio of blue marbles to all marbles in the bag ???

Answers

Answer:

9:5

5:14

Step-by-step explanation:

Given RWS~TUV find the values of x and y

Answers

The values of x and y will be 10 and 4 respectively, using congruent of the triangle.

What is congruent of the triangle?

The shapes maintain their equality regardless of how they are turned, flipped, or rotated before being cut out and stacked. We'll see that they'll be placed entirely on top of one another and will superimpose one another. Due to their identical radius and ability to be positioned directly on top of one another, the following circles are considered to be congruent.

Any two figures can be perfectly positioned over one another to demonstrate their congruence. The relationship between two figures that are said to be congruent is described using the word "congruence."

Here, ΔRWS ≅ ΔTUV

Here 2y + 10 = 30

2y = 30-10

y=20/2

y=10.

Agian ∠R = ∠T

Here ∠T = 90 -32 =58°

So 8x+26 = 58°

8x = 58-26

x = 32/8

x = 4.

Hence the values of x and y will be 10 and 4 respectively.

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A customer withdrew $45 from a bank account. The customer then deposited $150 into the bank account the next day. Write an equation to show the net effect of these transactions. What is the equation?

Answers

The equation to show the net effect of these transactions is x - 45 + 150.

The equation is x + 105.

What is an equation?

An equation is the statement that illustrates that the variables given. In this case, two or more components are taken into consideration to describe the scenario.

In this case, the customer withdrew $45 from a bank account and the customer then deposited $150 into the bank account the next day.

Let the initial amount in the account be x. The amount after the transaction will be:

= x - 45 + 150

= x + 105

The equation is x + 105.

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The residents of a city voted on whether to raise property taxes. The ratio of yes votes to no votes was 7 to 5. If there were 6412 yes votes, what was the total
number of votes?

Answers

The total number of votes which is reduced by the ratios of yes and no votes will be: 4580; + 6412 = 10992;

What are Ratios?

Comparing two amounts of the same units and determining the ratio tells us how much of one quantity is in the other. Two categories can be used to categorize ratios. Part to whole ratio is one, and part to part ratio is the other. The part-to-part ratio shows the relationship between two separate entities or groupings. For instance, a class has a 12:15 boy-to-girl ratio, whereas the part-to-whole ratio refers to the relationship between a particular group and the entire. For instance, five out of every ten people enjoy reading. As a result, the ratio of the part to the whole is 5: 10, meaning that 5 out of every 10 people enjoy reading.

In the given question, we have:

The ratio of yes votes to no votes was 7 to 5.

Total Number of Yes votes = 6412;

So, Let us assume the total number of no votes be x;

So, according to the question,

[tex]\frac{7}{5} = \frac{6412}{x}[/tex]

Cross Multiplying the terms:

⇒7 × x = 6412 ×5

⇒x = 4580;

So, The total number of no votes is 4580;

So, The total number of votes will be: 4580; + 6412 = 10992;

Hence,

The total number of votes will be: 4580; + 6412 = 10992;

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What is the slope of the ramp shown in the diagram below?
O A.
OB.
3
10
OD.
C. -1/3
ო|e Pm p|ო
3
10

Answers

According to the Pythagoras theorem, the value of the slope of the ramp is 10.44

Pythagoras theorem

Pythagoras theorem states that the sum of squares of the sides equal to the square of the hypotenuse.

The general form of the Pythagoras theorem is,

c² =  a² + b²

where

c refers the hypotenuse

a and b refers the sides of the triangle.

Given,

Here we have the ramp with the side values 3 and 10.

Now, we have to find the value of the slope.

Let us consider x be the hypotenuse or slope of the ramp.

We know that the Pythagoras theorem states that the square of the hypotenuse is equal to the sum of square of the sides.

So, it can be written based on these,

x² = 3² + 10²

x² = 9 + 100

x² = 109

x = √109

When we simplify this one then we get the value of slope as 10.44.

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Consider this equation. |y + 6| = 2 what can be concluded of the equation? check all that apply.

Answers

The conclusion from the equation |y + 6| = 2 is that it has two solutions , the correct option is (b) .

In the question ,

it is given that ,

the equation is given as |y [tex]+[/tex] 6| [tex]=[/tex] 2 ,

after removing the modulus  , we get the two equations , that are

y + 6 = 2 and y + 6 = -2

Solving y + 6 = 2 , we get

y + 6 = 2

Subtracting 6 from both LHS and RHS ,

we get

y = 2 - 6

y = -4

On Solving y + 6 = -2 ,

we get

y + 6 = -2,

Subtracting 6 from both LHS and RHS ,

we get

y = - 2 - 6

y = -8 .

the two solutions are y = -8 and y = -4 .

Therefore , The conclusion from the equation |y + 6| = 2 is that it has two solutions , the correct option is (b) .

The given question is incomplete , the complete question is

Consider this equation. |y + 6| = 2 what can be concluded of the equation? check all that apply.

(a) There will be one solution

(b) There will be two solutions.

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Help please please please please

Answers

Answer:

Step-by-step explanation




TS=13 as opp sides in an isosceles triangle are equal


AngleT=60


as 60+60+T=180

(100 points and brainly)
Which expression is equivalent to (6^−2 • 3^5)^−2?

three raised to the third power divided by six raised to the fourth power
negative three raised to the third power divided by six raised to the fourth power
six raised to the fourth power divided by three raised to the tenth power
negative six raised to the fourth power divided by three raised to the tenth power

Answers

Answer: 16\/729

Step-by-step explanation:

Answer:

six raised to the fourth power divided by three raised to the tenth power

Step-by-step explanation:

(6^−2 • 3^5)^−2 = 6^(-2*-2) * 3^(5*-2) = 6^4 * 3^(-10) = 6^4 / 3^10

Please answer this. I’ve been stuck on it for 30 mins

Answers

Using the GCF to factor and the distributive property 28 + 24 = 4(7 + 6)

How to write numbers as a factor using the greatest common factor?

28 + 24 as a product of the two factors using greatest common factor and the distributive property can be represented as follows:

The greatest common factor is defined as the largest number that is a factor of two or more numbers.

The distributive property states that an expression which is given in form of A (B + C) can be solved as A × (B + C) = AB + AC.

Therefore, lets solve 28 + 24 using GCF and the distributive property.

The GCF of 28 and 24 is 4. Hence,

28 + 24 = 4(7 + 6)

Therefore,

28 + 24 = 4(7 + 6)

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Use the model below to estimate the average annual growth rate of a certain country’s population for 1950, 1988, and 2010, where x is the number of years after 1900.

y= -0.0000081x^3+0.00267x^2+8.231

Answers

The growth rates in 1950, 1988 and 2010 are 13.9%, 23.4 and 29.8% respectively

How to estimate the country's population?

The function of the growth rate equation is given as:

y = -0.0000081x^3+0.00267x^2+8.231

Rewrite properly

So, we have

y = -0.0000081x³ + 0.00267x² + 8.231

From the question, we have

x represents the number of years after 1900

In 1950, x = 50

So, we have

Growth rate in 1950, y = -0.0000081 x 50³ + 0.00267 x 50² + 8.231

Growth rate in 1950, y = 13.9

In 1988, x = 88

So, we have

Growth rate in 1988, y = -0.0000081 x 88³ + 0.00267 x 88² + 8.231

Growth rate in 1988, y = 23.4

In 2010, x = 110

So, we have

Growth rate in 2010, y = -0.0000081 x 110³ + 0.00267 x 110² + 8.231

Growth rate in 2010, y = 29.8

Hence, the growth rate in 2010 is 29.8%

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The dimensions of a right rectangular prism are (8)/(5)cm,(10)/(3)cm, and (7)/(4)cm.
What is the volume of the prism?
A. (25)/(12)cm^(3)
B. (7)/(3)cm^(3)
C. (16)/(3)cm^(3)
D. (28)/(3)cm^(3)

Please help

Answers

If the dimensions of a right rectangular prism are (8)/(5)cm,(10)/(3)cm, and (7)/(4)cm. Then volume of the prism is 401/60 cm³

What is Three dimensional shape?

a three dimensional shape can be defined as a solid figure or an object or shape that has three dimensions—length, width, and height.

A rectangular prism is a three-dimensional solid shape with six faces that including rectangular bases

The dimensions of a right rectangular prism are width is 8/5 cm, Length is 10/3cm and Height is 7/4cm

Volume=Width×Height×Length

=8/5×10/3×7/4

=96+200+105/60

=401/60 cm³

Hence volume of the right rectangular prism is 401/60 cm³

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Write the polynomial in standard form g(x) = 3(x + 2)(4x - 1)(x - 5)

Answers

12x³ - 39x² -   111x + 30 is polynomial in standard form .

What in mathematics is a polynomial?

Using mathematical operations like addition, subtraction, multiplication, and division, a polynomial is an expression made up of variables, constants, and exponents.

standard form g(x) = 3(x + 2)(4x - 1)(x - 5)

                      g(X) = 3[ 4x² - x + 8x - 2 )( x - 5 ) ]

                             = 3[ ( 4x² + 7x - 2 ) ( x - 5 )]

                             = 3 [ 4x³ + 7x² - 2x - 20x² - 35x + 10 )]

                             = 3[ 4x³ - 13x² - 37x + 10 ]

                             = 12x³ - 39x² -   111x + 30

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17. A group of 36 people attended a ball game. There were twice as many children as adults in the group. Set up a
system of equations that represents the numbers of adults and children who attended the game and solve the
system to find the number of adults and the number of children who were in the group.

Answers

Answer:

36 = 2x + y

x = y

x = 12

y = 12

Step-by-step explanation:

Answer:A=12 C=24

Step-by-step explanation:

there are 3 shares[2x and theunknown]

36=3shares so 1 share=36divided by3=12

ad=12

ch=12x2=24

12+24=36

Other Questions
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