A family has two cars. the first car has a fuel efficiency of 20 miles per gallon of gas and the second has a fuel efficiency of 25 miles per gallon of gas. during one particular week, the two cars went a combined total of 775 miles, for a total gas consumption of 35 gallons. how many gallons were consumed by each of the two cars that week?

Answers

Answer 1

Answer: Let's call the fuel consumption of the first car "x" and the second car "y"
x + y = 35 is the total fuel consumed.
20x + 25y = 775 is the distance traveled.
Solve the two equations. Skipping a few steps, I get
5y = 75. Therefore y = 15. So y used 15 gallons of gas. Therefore x used 20 gallons.

20 gallons, 15 gallons.

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y =

Answers

Answer:

x=-1 y=-3

............

Answer:

(−1,−3) or x=−1,y=−3

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

What is the measure of how much surface an object has?a. mass
c. region
b. volume
d. area

Answers

the answer is D. area

Answer:

D area

Step-by-step explanation:

If x is a real number such that x³ = 64, then x² + √x =?

Answers

$x^3 = 64\n \nx=\sqrt[3]{64}\n \nx=4 \n \n \n x^2 + √( x )=4^2+√(4)=16+2 =18$

If x³=64
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x²=16
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Solve the equation. If necessary, round your answer to the nearest tenth.4x2 = 121

A.
2.75, –2.75

B.
5.5, –5.5

C.
11, –11

D.
30.25, –30.25

Answers

B: x = 5.5 or -5.5 (square root) -> 2x = 11 (divide by 2) -> x = 5.5 or -5.5

Answer:

5.5 or -5.5

Step-by-step explanation:

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Select the graph that represents the volume of a cube as a function of the length of an edge.

Answers

Answer:

The Graph D) is correct

Step-by-step explanation:

Let, x be length of cube and y is volume of cube

The volume of cube is given by

Volume = $(\textrm{Length of one side of cube})^(3)$

Such that, all the sides of cube are equal

We can write as y= $x^(3)$

Thus, The Graph D) is correct

The diameter of your bicycle wheel is 20 inches. How far will you move in one turn of your wheel?

Answers

To do this, You must know the formula. D=3.14l*r Or, Distance=3.14length*revolutions
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