Answers
Answer:
B
Step-by-step explanation:
the absolute value function always gives a positive result
However, the value inside can be positive or negative, that is
5x + 30 = 10x or - (5x + 30) = 10x
solving both
5x + 30 = 10x (subtract 5x from both sides )
30 = 5x ( divide both sides by 5 )
6 = x
or
- (5x + 30) = 10x
- 5x - 30 = 10x ( add 5x to both sides )
- 30 = 15x ( divide both sides by 15 )
- 2 = x
As a check
substitute these values into the equation and if both sides are equal then it is a solution.
x = 6
left side = | 5(6) + 30 | = | 30 + 30 | = | 60| = 60
right side = 10(6) = 60
Then x = 6 is a solution
x = - 2
left side = | 5(- 2) + 30 | = | - 10 + 30 | = | 20 | = 20
right side = 10(- 2) = - 20 ≠ 20
Thus x = - 2 is an extraneous solution
Related Questions
In 2003 Exxon Mobil received a contract from the government worth $756,733 while Aerospace received a contract from the government worth $539,517. What was the combined total of their contracts?
Answers
The combined total of their contracts is $1,296,250
How to determine the combined total?The values of the contracts are given as:
Exxon Mobil= $756,733Aerospace = $539,517The combined total is represented as:
Total = Exxon Mobil + Aerospace
Substitute known values
Total = $756,733 + $539,517
Evaluate the sum
Total = $1,296,250
Hence, the combined total of their contracts is $1,296,250
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Use Pemdas to evaluate: 5c - 19, c=10
Answers
Plug in c which is 10 into the equation
PEMDAS rule is multiplication before subtraction
50-19=31
A stick of gum is 2 inches long. Are 10 sticks of gum longer than 3 feet?
Answers
27 Solve for x to the nearest tenth: x² + x - 5 = 0.
Answers
Answer:
Step-by-step explanation:
We can use the quadratic formula to get the answer to this
Quadratic Formula: -b +- √b² - 4ac/2a
Once we input A, B, and C into this, and solve any multiplication, we get
x = -1 +- √1 + 20/2
We divide by 2a, which 2a = 2.
-0.5 +- 10.5.
these are the following values of x:
x = 10
x = 11
Pretty sure this is it, hope it helps!
How was life different for Romans with low incomes and wealthy Romans? Romans living in poverty had few duties and more free time. Wealthy Romans had many responsibilities and few days off. Wealthy Romans relied on servants to run their households. Romans living in poverty were not allowed to work a trade.
Answers
Wealthy Romans relied on servants to run their households.
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Answer:
The correct answer is Wealthy Romans relied on servants to run their households.
Step-by-step explanation:
I got it right on edge 2022
A ball is thrown into the air with an upward velocity of 36 ft/s. Its height h in feet after t seconds is given by the function h = −16t2 + 36t + 10. In how many seconds does the ball reach its maximum height? Round to the nearest hundredth if necessary. What is the ball’s maximum height?
Answers
The ball's maximum height is 30.25 feet.
What is quadratic equation?A quadratic equation in math is a second-degree equation of the form ax² + bx + c = 0. Here a, b, are the coefficients, c is the constant term, and x is the variable.
Given:
h= -16t²+36t+10
Differentiate w.r.t. 't',
h' = -32t+36
When h=0, that will be the maximum height
32t= 36
t= 9/8
t= 1.125 sec.
So, The maximum height is
h(1.123)= -16(1.125)² + 36*1.125+10
h(1.125) = 30.25 feet.
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A car travels 294 miles per hour on a full tank of gas . the cars gas tank holds 14 gallons. how many yards per gallon can this car travel?
Answers
Answer:
36960 yards
Step-by-step explanation:
294/14=21
1 gallon is 21 miles
1 mile is 1760 yard
21 miles is 36960 yards
36960 yard is the answer assuming 14 gallons is a full tank of gas
Pls help and put equation and work
Answers
Step-by-step explanation:
that is a large gift. wow ! you have a lucky teacher ...
the surface of a block consists of 6 (3 pairs of) areas :
front and back
left and right
top and bottom
you know that the area of a rectangle is length × width ?
so,
front and back are
2× 9×13.5 = 18×13.5 = 243 m²
let and right are also
2× 9×13.5 = 243 m²
top and bottom are
2× 9×9 = 2 × 81 = 162 m²
so, for the whole package you need
243 + 243 + 162 = 648 m²
the money for that amount of wrapping paper alone would be way more than I ever spent on a teacher in my life ...
What is the median of the following distribution?
26, 26, 28, 29, 31, 33, 35, 36, 37, 38, 40, 42, 43, 46, 48
OA. 33
OB. 37
O C. 56
OD. 43
OE. 36
Answers
If AC = 41, find the value of x? (Giving 35 points)
Answers
17x+7= 41
17x = 34
X = 2
[tex]\huge \boxed{\sf x=2}\\\\\\\displaystyle \sf AC=AB+BC\\\\41=3x-1+14x+8\\\\41=17x+7\\\\Subtracting\ 7\ from\ each\ side \\\\ 41-7=17x+7-7 \\\\ 34=17x\\\\Dividing\ each\ side\ by\ 17 \\\\ \frac{34}{17}=\frac{17x}{17} \\\\ 2=x[/tex]
Sandra wants to wrap a gift box 6 inches in length, 4 inches in height, and 13 inches in width. How much wrapping paper does Sandra need to buy
Answers
Answer:312
Step-by-step explanation: multiply 6*4*13
What is the quadratic regression equation that fits these data?
the answer is:
y = 2. 13x^2 + 0. 13x + 6. 39
hope it helps
Answers
The regression equation of the data values is y = 2.13x^2 + 0.13x + 6.39
How to determine the regression equation?The attached table represents the missing information in the question.
Next, we enter the data values in a graphing technology
Using the graphing technology, we have:
a =2.13; b = 0.13 and c = 6.39
A quadratic regression is represented as:
y = ax^2 + bx + c
So, we have:
y = 2.13x^2 + 0.13x + 6.39
Hence, the regression equation of the data values is y = 2.13x^2 + 0.13x + 6.39
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A helicopter travels 30 kilometers in 3 minute. What is the speed in terms of
33
10
kilometers per minute?
Answers
The speed is the distance covered by an object at a particular time. The speed of the helicopter is equal to 10 kilometer/minute.
What is speed?The speed is the distance covered by an object at a particular time. Therefore, it is the ratio of distance and time.
[tex]\rm{Speed = \dfrac{Distance}{Time}[/tex]
Given the helicopter travels 30 kilometers in 3 minute. Therefore, the speed of the helicopter is equal to,
Speed = 30 kilometer/ 3minutes = 10 kilometer/minute.
Hence, the speed of the helicopter is equal to 10 kilometer/minute.
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Please solve with explanation
Answers
Real life scenarios of acute angles are:
Sighting a ball from the top of a building at an angle of 55 degrees.The angle between two adjacent vanes of a fan that has 6 vanesWhat are acute angles?As a general rule, an acute angle, x is represented as: x < 90
This means that acute angles are less than 90 degrees.
The real life scenariosThe real life scenarios that involve acute angles are scenarios that whose measure of angle is less than 90 degrees.
Sample of the real life scenarios that satisfy the above definition are:
Sighting a ball from the top of a building at an angle of 55 degrees.The angle between two adjacent vanes of a fan that has 6 vanesRead more about acute angles at:
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20 points!!!What is the equation to plug this into a graph?
Answers
t = 0
t = 5
Step-by-step explanation:
(-10t^2+50t)/(t^2+4t+3)
I'm making t into x so its not confusing with the plus sign
(-10x^2+50x)/(x^2+4x+3)
with (x^2+4x+3) :
what 2 numbers when multiplied make 3 and when added make 4 ?
they are 1 and 3
(x+1)(x+3)
(-10x^2+50x)/(x+1)(x+3)
(-10x(x-5))/(x+1)(x+3) =0
(-10t(t-5))/(t+1)(t+3)=0
t = 0
t = 5
A ball is thrown upward in the air. The height h, in feet, of the ball t seconds
after being thrown can be determined by the equation
h=-16t² + 40t + 4
How long does it take for the ball to hit the ground? Round to one decimal
place.
Answers
By solving a quadratic equation, we will see that the ball hits the ground after 2.6 seconds.
How long does it take for the ball to hit the ground?
Here we need to solve the equation:
h(t) = 0 = -16t² + 40t + 4
This represents that the ball hits the ground.
So we just need to solve that quadratic equation, using the general formula we get:
[tex]t = \frac{-40 \pm \sqrt{(40)^2 - 4*4*(-16)} }{2*-16} \\\\t = \frac{-40 \pm 43.1 }{-32}[/tex]
We only care for the positive solution, which is:
t = (-40 - 43.1)/-32 = 2.6s
So the ball hits the ground after 2.6 seconds.
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PLEASE HELP ME! I NEED HELP, THIS IS REALLY IMPORTANT!!!
80 POINT QUESTION
Answers
Answer: A translation left 3 units and up 6 units
In order to find the translation of a shape in the graph.
Take particular one point from the original shape: (0, 2)
Take particular one point from the translated shape: (-3, 8)
Let the translation be (x, y)
Original + Translation = Translated Image
(0, 2) + (x, y) = (-3, 8)(x, y) = (-3, 8) - (0, 2)(x, y) = (-3, 6)This implies the shape has been translated 3 units left and 6 units up.
A triangular prism. The rectangular sides are 3 feet by 2 feet, 3 feet by 2.5 feet, and 3 feet by 1.5 feet. The 2 triangular sides have a base of 2 feet and height of 1.5 feet.
Trenton is building a skateboarding ramp in the shape of a triangular prism. According to his plan, the ramp would have a base of 2 feet, a height of 1.5 feet, and a length of 3 feet. The riding surface would measure 2.5 feet.
If Trenton wants to cover all faces of the ramp with plywood, how much plywood will he need to buy?
Trenton will need
square feet of plywood.
Answers
The amount of plywood needed by Trenton = total surface area of the triangular prism-shaped ramp = 21 ft².
What is the Surface Area of a Triangular Prism?Total surface area of a triangular prism = (perimeter of triangular base × length of prism) + 2(area of triangular base) = (s1 + s2 + s3 × L) + 2(1/2 × b ×h).
The amount of plywood needed to cover the ramp = total surface area of the triangular prism-shaped ramp.
We are given the parameters:
s1 = 2 fts2 = 1.5 fts3 = 2.5L = 3 ftb = 2 fth = 1.5 ftTotal surface area of the triangular prism-shaped ramp = (s1 + s2 + s3)L + 2(1/2 × b ×h) = (2 + 1.5 + 2.5)3 + 2(1/2 × 2 ×1.5)
= (18) + (3)
Total surface area = 21 ft²
Trenton will need 21 square feet of plywood.
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which represents the inverse of the function f(x)=4x?
Answers
Answer:
h(x) = 1 / 4x
last choice
Step-by-step explanation:
y = 4x becomes x = 4y
we want to solve for y,
divided both sides by 4
x / 4 = 4y / 4
x / 4 = y
Answer:
[tex]h(x) = \dfrac 14 x[/tex]
Step-by-step explanation:
[tex]y = f(x) = 4x\\\\\text{Replace x with y and then solve for y:}\\\\~~~~~x = 4y\\\\\implies y = \dfrac x4\\\\\implies f^{-1}(x) = \dfrac 14x[/tex]
geometry please answer
Answers
Answer: 8
Step-by-step explanation:
[tex]\frac{180(n-2)}{n}=135\\180(n-2)=135n\\180n-360=135n\\-360=-45n\\n=\boxed{8}[/tex]
For a science project, billy observed a chipmunk and a squirrel stashing acorns in trees. the chipmunk hid 3 acorns in each tree. the squirrel hid 4 acorns in each tree. they each hid the same number of acorns, although the squirrel needed 2 fewer trees. you are going to investigate the number of acorns that each animal hid.
Answers
The number of acorns that each animal hid is 48
What is an Equation ?An equation is formed when two algebraic expressions are equated by an equal sign.
It is asked to calculate the number of acorns that each animal hid.
Total number of acorns hid = number of acorns hid per tree * number of trees
Let T be the number of trees chipmunk used
For chipmunk: = 3*T
For squirrel: = 4*(T-4)
As both the animals hid same number of acorns.
3T = 4(T-4)
3T = 4T - 16
16 = T
Therefore the chipmunk hid 16 * 3 = 48 acorns
and the squirrel hid 4(16-4) = 48 acorns.
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Please help! Giving brainlist!
Answers
Answer:
2
Step-by-step explanation:
The rise is two using the slope formula
rise/run
2/3
2 is the rise
Give brainliest please.
Hope this helps
Answer:
2
Step-by-step explanation:
Remember the rise-run formula
rise ÷ run
The rise is 2, and the run is 3, making this two-over-three.
Which shows the un-simplified solution for x2 + 8x + 6 = 0?
Answers
Answer:
A) [tex]\displaystyle x=\frac{-8\pm\sqrt{40}}{2}[/tex]
Step-by-step explanation:
We know that the discriminant is [tex]b^2-4ac=(8)^2-4(1)(6)=64-24=40[/tex], so it cannot be B or C.
Also, because [tex]2a=2(1)=2[/tex], then the denominator must be 2, which means that A is the correct un-simplified solution for the quadratic equation.
Answer:
Choice A
Step-by-step explanation:
Let's solve to check.
Given:
x^2 + 8x + 6 = 0
Solution:
We know that,
Let us assume that Quadratic Formula = x[tex] \implies \rm \: x = \cfrac{ { - b±} \sqrt{ {b}^{2} - 4(ac)} }{2a} [/tex]
Here, a = 1b = 8c =6So substitute them:
[tex] \implies \rm \: x = \cfrac{ - 8± \sqrt{ {8}^{2} - 4(1 \times 6)} }{2 \times 1} [/tex]
[tex] \implies \rm \: x = \cfrac{ - 8± \sqrt{64 - 4 \times 6 } }{2} [/tex]
[tex] \implies \rm \: x= \cfrac{ - 8 ±\sqrt{64 - 24} }{2} [/tex]
[tex]\boxed{ \implies \rm \: x = \cfrac{ - 8 ±\sqrt{40}}{2}}[/tex]
Hence, choice A[x = {8±√(40)/2}] shows the un-simplified solution for x2 + 8x + 6 = 0.
What is the median of the following data set?
{6, 3, 9, 1, 7}
3
6
8
9
Answers
Answer:
6
Step-by-step explanation:
First order them from least to greatest:
1, 3, 6, 7, 9
The median is 6 because it is the middle value.
Hope this helps! Brainliest would be really appreciated
a concert promoter sold 475 tickets to a rock concert the ticket prices for different seat locations were 10 15 and 20 the total income from the concert was 6300 if the combined number of 10 15 tickets sold was 4 times the number of 20 tickets sold how many 10 tickets were sold
Answers
282.5 of 10 tickets were sold in the rock concert by the promoter
How to determine the number of 10 tickets?To do this, we make use of the following representations:
x represents the 10 ticketsy represents the 15 ticketsz represents the 20 ticketsThe 475 tickets that were sold means that:
x + y + z = 475
The income means that:
10x + 15y + 20z = 6300
Also, we have:
10y = 4z
Divide both sides by 10
y = 0.4z
Substitute y = 0.4z in 10x + 15y + 20z = 6300
10x + 15*0.4z + 20z = 6300
10x + 6z + 20z = 6300
Evaluate the like terms
10x + 26z = 6300
Substitute y = 0.4z in x + y + z = 475
x + 0.4z + z = 475
Evaluate the like terms
x + 1.4z = 475
Make x the subject
x = 475 - 1.4z
Substitute x = 475 - 1.4z in 10x + 26z = 6300
10(475 - 1.4z) + 26z = 6300
Expand
4750 - 14z + 26z = 6400
Evaluate the like terms
12z = 1650
Divide both sides by 12
z = 137.5
Substitute z = 137.5 in x = 475 - 1.4z
x = 475 - 1.4 * 137.5
Evaluate
x = 282.5
Hence, 282.5 of 10 tickets were sold
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PLEASE HELP ANSWER ALL!!! WITH DIAGRAM!!!
You toss a coin (heads or tails), then spin a three-color spinner (red, yellow, or blue). Complete the tree diagram, and then use it to find a probability.
1. Label each column of rectangles with "Coin toss" or "Spinner."
2. Write the outcomes inside the rectangles. Use H for heads, T for tails, R for red, Y for yellow, and B for blue.
3. Write the sample space to the right of the tree diagram. For example, write "TY" next to the branch that represents "Toss a tails, spin yellow."
4. How many outcomes are in the event "Toss a tails, spin yellow"?
5. What is the probability of tossing tails and spinning yellow?
Answers
Answer:
For Questions 1 , 2 and 3 check the attached diagram
4. How many outcomes are in the event "Toss a tails, spin yellow"?
There is only one outcome ‘TY’ in this event .
5. What is the probability of tossing tails and spinning yellow?
[tex]p\left( TY\right) =\frac{1}{6}[/tex]
Step-by-step explanation:
Diagram
Explain how to solve 5^(x-2)=8 using log base b of y equals log y over log b. include the solution for x in your answer. round your answer to the nearest thousandth.
Answers
The value of x will be equal to 2.477.
What is a logarithm?The logarithm is the inverse function of exponentiation in mathematics. That is, the logarithm of a given number x is the exponent to which another fixed number, the base b, must be raised in order to obtain that number x.
The given expression will be solved as follows;-
[tex]5^{x-2}= 8[/tex]
Taking Log on both sides.
[tex]Log_e 5^{x-2}=Log_e8[/tex]
(x-2) Log5 = Log 8
( x-2) = Log8 / Log 5
(x - 2) = Log 8 - Log 5
(x - 2 ) = Log 3
x-2 = 0.477
x = 2.477
Therefore the value of x will be equal to 2.477.
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Given y=3x-3, find y if x=4
Answers
Answer: Given y=3x-3, find y if x=4
y=3x-3
x=4
y=3(4)-3
y=12-3
y=9
Step-by-step explanation: hopes this helps
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si se utilizan 9.01 litros de pintura para pintar 1.7 metros cuadrados de pared,cuantos litros de pntura necesitanpara pinatr 1 metro cuadrado de pared
Answers
Usando proporciones, hay que se necessita 8.42 litros de pintura para pintar 1 metro cuadrado de pared.
¿Qué es una proporción?Una proporción es una fracción de la cantidad total, e puede ser encontrada aplicando una regla de três.
En este problema, se utilizan 9.01 litros de pintura para pintar 1.7 metros cuadrados, por eso, la cantidad relativa a 1 metro cuadrado es dada por:
c = 9.01/1.7 = 8.42 litros.
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r,s and t are the vectors given by 4i+j,3i+2j and 4i +j respectively.find [r+s+t]
Answers
Answer:
11i+4j
Step-by-step explanation:
add the i's together and the j's together.