A chemist needs 90 milliliters of a 57% solution but has only 27% and 72% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.

Answers

Answer 1

Answer:

18=18

Step-by-step explanation:

a=90-b

a=50 mL at 4%

b=40 mL at 40%

check

0.04*50+0.4*40=0.2*90

2+16=18

18=18


Related Questions

In a school of 464 students, 89 students are in the band, 215 students are on sports teams, and 31 students participate in both activities. How many students are involved in neither band nor sports?
A.160 students
B.191 students
C.249 students
D.433 students

Answers

Answer:

191 students  B option is correct

Step-by-step explanation:

Total students=464

In band=89

sports teams=215

Number of students who participates in activities is

215+89=304

31 participate in  both activities so,

304-31=273

273 who participate in activities

Total students-273=Not involved in any activity

464-273=191

please help !
A local paintball facility charges $30 to play plus $0.25 per paintball pellet used. Elijah plans on playing paintball and has $60 to spend at the facility. Which equation can be used to determine p, the number of paintball pellets he can use if he spends exactly $60?

A. 30 + 0.25p = 60
B. 30 + 0.25 = 60p
C. 30p + 0.25 = 60
D. 30 − 0.25p = 60

Answers

Step-by-step explanation:

Hello! I believe the answer is A. 30+0.25p=60.

Elijah has to pay a facility charge which is 30$. So we can go ahead and write that down! He has 60$ to spend, but he has to pay $0.25 per paintball. So we write that as 30+0.25p=60!! If you have any questions comment doen below!

Answer:i think it A to

Step-by-step explanation: it is the only one correct

(6x2 - 2x) + (5x-7)
A. 30x3 - 52x2 + 14x
B. 6x2 - 7x+7
c. 11x2 - 9x
D. 6x2 + 3x - 7

Answers

Answer:

The answer is D

16 feet = ? meters ?

Answers

Answer:

0.3048

Step-by-step explanation:

0.3048

Answer:

4.88 meters

Step-by-step explanation:

1 foot is approximately 0.3048 meters. 16(0.3048)= 4.88 meters (rounded to the nearest hundreth).

Hope this helped!

Solve for angle B, then side a. Round to the nearest tenth.

Answers

Answer:

Angle B: 28 degrees

Side a: 27.6

Step-by-step explanation:

Angle B:

180-112-40=28

Side a:

sin 28/14 = sin 112/a

a = sin 112(14)/sin 28

a = 27.6

Choose a positive number. Using this number as
the base, evaluate it when the exponent is 3,0,
and -2. Show all work.

Answers

Answer:

Step-by-step explanation:

Choose 3.

3^3 = 27;

3^0 = 1; and

3^(-2) = 1/9

Solve for y: -5y + 6 = 16​

Answers

Answer:

y= -2

Step-by-step explanation:

Answer:

[tex]y=2[/tex]

Step-by-step explanation:

Well first move the 6 to the right side to isolate the y by taking 6 away from both sides to get [tex]-5y=10[/tex]. Then divide both sides by -5 to get [tex]y=2[/tex]. Hope this helps!

Pls mark brainliest!

Which expression is not equal to 1?

sin θ csc θ
cos θ sec θ
tan θ cot θ
sin θ cos θ

Answers

Answer:

sin θcos θ

hope it is helpful to you

Answer:

sin A cos A

Step-by-step explanation:

[ I don't know to type angle theta here so assume A as theta]

As , sin A= p/ h

cos A= b/ h

so,

sinA cosA = p/ h × b/h

= pb/ h^2 ( which is not equal to 1 )

Tip; you can easily verify other relations expressing trigonometric ratios in terms of p,b & h and further simplifying..

Find the missing angle please help

Answers

Answer:

saw this question on egde its b

g2 + 23 when g = 6??? help

Answers

12+23 then 35 is the answer

Mikel gave a $1.32 tip for an order that cost $8.80.
Determine whether or not each tip below is proportional to Mikel's tip.
Proportional to Mikel's tip
Not proportional to Mikel's tip
$2.22 tip for a $14.80 order
$1.86 tip for a $10.50 order
ООО
$0.78 tip for a $5.20 order

Answers

Answer:

Step-by-step explanation:

Multiple the numbers one by one and the answers you’ll get u can choose to divide multiple plus or minus and u will get the answer

SCENARIO A:When the Puertas family moved into their home 14 yearsago, there was alemon and orange tree in their backyard. Both treeshave since been growing ata constant rate. 2 years after the Puertas familymoved in, the lemon tree was 7feet tall, and 8 years after they moved in, the lemontree was 10 feet tall. As forthe orange tree, 3 years after the Puertas familymoved in, it was 4 feet tall, and7 years after they moved in, the orange tree was 8feet tall.Question 1:How many years afterthe Puertas family moved in willthe lemon tree and theorange tree be the same height?What height will theybe?

Answers

Answer: 18

Step-by-step explanation:

(c) The annual membership fee in 2013 is $198 for each adult and $75 for each child.

Adult = 440 members
Children = 120 members

(i) Calculate the total amount the 560 members pay in 2013.


(ii) The adult fee of $198 in 2013 is 5.6% more than the fee in 2012.
Calculate the adult fee in 2012.​

Answers

Answer:

i ) $96120

ii ) Singular adult fee in 2012: $186.91

Step-by-step explanation:

( i )

To find the costs of all 560 peoples you:

Multiply the amount of people by the fee,

440 × 198 = $87120

120 × 120 = $9000

Add these go get the sum of member fees: $96120

( ii )

First calculate what 1% of the adult fee would be:

198 ÷ 100 = 1.98 = 1%

Then calculate what 0.1% of the fee:

1.98  ÷ 10 = 0.198 = 0.1%

Now multiply 5 by the value of 1% to get 5% :

5 × 1.98 = 9.9

Then multiply 6 by the  0.1% to get 0.6% :

0.198 × 6 = 1.188

Add these numbers together to get:

1.188 + 9.9 = $11.088 = 5.6%

Due to the fact this question is referring to money we will round this number 2 decimal places (as money does not exceed 2dp)

$11.09

We now subtract this from the 2013 fee to find out the 2012 fee

$198 - $11.09 = $186.91

$186.91 was the cost of a singular adult fee in 2012

Help me solve this pls

Answers

Answer:

[tex] \frac{x - 10}{8} [/tex]

Step-by-step explanation:

[tex] \frac{3x}{8} - \frac{x + 5}{4} [/tex]

The common denominator of both fractions is 8. Therefore,, divide the denominator of each fraction, then multiply what you get by the numerator of each fraction.

Thus:

[tex] \frac{1(3x) - 2(x + 5)}{8} [/tex]

[tex] \frac{3x - 2x - 10}{8} [/tex]

[tex] \frac{x - 10}{8} [/tex]

2(x - 3) = 2x + 5? Need Help Now

Answers

Answer:  it has no solutions

Step-by-step explanation:

if im wrong i owe u

2(x - 3) = 2x + 5     distribute by multiply 2 into the parenthesis.

2x - 6 = 2x + 5

-2x        -2x         subtract 2x on both sides, 2x's will cancel on both sides.

____________

-6 = 5

Since -6 = 5, there is no solution because -6 cannot equal to 5, which is a false statement. Thus, "C. There is no solution." is the correct answer. Hope this helps :)

Mr. Henry spent $15 on a new hat this week. He learned that the same hat available on
sale at $12 last week. What was the percentage increase in the price of the hat this
week?

Answers

Last week was $12
This week is $15
%increase = (15-12)/12 = 25%

Solve for x. Show all your steps/work.
(¼)x + 1 = 22x

Answers

22x-1/4x= 1
21.75x=1
x=0.046

Im not sure tho:) but probably its correct
Answer is x= 4/87
Step 1: multiply 4 by both sides of the equation which is 22. Which gives you x+4= 88x
Step 2: Move the constant to the right-hand side and change its sign (it was +4 but it’s now -4) then move the variable to the left-hand side and change its sign (which is +88 but is now -88x)
Step 3: collect like terms which is 1-88x that gives you -87x= -4
Step 4: divide both sides by -87
That gives you the answer

1/4x +1= 22
Multiply by 4
X+4 = 88x
Move the terms
X- 88x= -4
Collect like terms
-87x=-4
Divide by -87
Equals 4/87

In the following triangle, angle A measures 49° and angle C measures
62.

Answers

Answer:

The measure of angle B is 69°.

Step-by-step explanation:

All angles of the triangle should add up to 180°, so you add angle A and angle C together, and then subtract that number from 180.

49 + 62 = 111

180 - 111 = 69

69°

A 10 ft. tree casts a 14 ft. shadow. If a building casts a 280 ft. shadow, how tall is the building?

Answers

Answer: The building is 200ft tall

Explanation: if you Set up a ratio.
10 is to 14 as x is to 280.

Simplify the expression: 4(x + 3) = 40

Answers

Answer:

x=7

Step-by-step explanation:

4x+12=40

-12

4x=28/4

Answer:

x =7

Step-by-step explanation:

4x + 12 = 40

4x + 12 - 12= 40 -12

4x = 28

4/4= 28/4

x= 7

in 2010. 465 students went to a certain school. In 2014, 372 students went to the same school. By what percent did the number of students decrease?

Answers

Answer:

20%

Step-by-step explanation:

465 - 372 = 93

93/465 = 0.2

0.2 × 100 = 20

Hope this helps !

1. Find the missing side for each triangle. Show all work.

Answers

Answer:

a. x ≈ 3.72b. x ≈ 8.08c. x ≈ 3.94

Steps:

a.

x = 7×tan(28)

x = 7×0.531..

x ≈ 3.72

b.

x = 7/cos(30)

x = 7/0.86..

x ≈ 8.08

c.

x = 6×sin(41)

x = 6×0.65..

x ≈ 3.94

Need ASAP please help

Answers

Answer:

POSSIBLY 1

Step-by-step explanation:

Please help im lost..

Answers

Answer:

c

Step-by-step explanation:

Want me to help you on your homework for free? If so, answer this question. I have no missing assignments.

Answers

Wait I just need points AND YES

Caleb earns points on his credit card that he uses toward future puchases. He earns four points per dollar spent on flights, two points per dollar spent at hotels,and one point per dollar spent on all other purchases. Last year, he charged a total of $9,480 and earned 14,660 points. The amount of money spent on flights was $140 more than twice the amount of money spent on hotels. Find the amount of money spent on each type of purchase.

Answers

Answer:

Let f = dollars spent on flights, h dollars spent on hotels, and p dollars spent on all other purchases.

Step-by-step explanation:

I NEED HELP PLZ THANK U BESTIES MUAH MUAH MUAH

Answers

Answer:

[tex]\frac{0+2}{3+1}[/tex]

Step-by-step explanation:

so basically we all know the formula for slope is [tex]\frac{x2-x1}{y2-y1}[/tex]. since the numbers are labeled, just plug them into their spots!

Answer:

b (-2)

Step-by-step explanation:

because the solution is y2-y1 over x2-x1 so you plug in the number that your Miss

Find the measure of angle y in the following figure.

Answers

Answer:

[tex]50^{o}[/tex]

Step-by-step explanation:

90 + 40 = 130

180 - 130 = 50

LeBron keeps track of events in his life relative to the year he was born. Relative to when he was born, his brother was born in year −3, and his family moved in year 7.
Which one of the following inequalities correctly compares the relative years?
Choose 1 answer:


(Choice A)
-3 > 7

(Choice B)
7 > -3
Which one of the following descriptions is correct?
Choose 1 answer:
(Choice A)
LeBron's family moved after his brother was born.
(Choice B)

LeBron's brother was born after his family moved.

Answers

Answer:

B then A

Step-by-step explanation:

Just easy

Answer:

first is A

then is B

Step-by-step explanation:

your welcome

Pls Help Asap pls T^T

Answers

Answer: think its c

Step-by-step explanation:

I believe the answer is 18%

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