math unit 2 quiz 3

After John worked at a job for 10 years, his salary doubled. If he started at $x, his salary after 10 years is _____.

$2x

Twice a certain number is tripled. The resulting number is _____.

(2x)3

If four times a certain number, increased by 6 is equal to 94, what is the number?

4x + 6 = 94

The sum of three numbers is 69. If the second number is equal to the first diminished by 8, and the third number is 5 times the first. What are the numbers?

69 = 7x - 8

A bus and a car leave from the same city traveling in opposite directions. The bus leaves 2 hours before the car does. The bus travels at a steady speed of 50 mph while the car travels at 70 mph. After how many hours will the bus and car be 800 miles apart?

70(h - 2)

Which of the following could represent consecutive even integers?

x + 1, x + 3

Thomas has $6.35 in dimes and quarters. The number of dimes is three more than three times the number of quarters. How many quarters does he have?

10(3q + 3)

A man walks 10 miles in x hours. How far does he walk in one hour?

10/x miles

The value in cents of 4 quarters and x dimes is _____.

100 + 10x

If Susie is 14, what was her age x years ago?

14 - x

Dwayne's garden is triangle-shaped with two equal sides and a third side that is 4 ft more than the length of an equal side. If the perimeter is 49 ft, how long is each side?

3x + 4 = 49

One side of a square is 3x + 2. Which expression represents the perimeter?

4(3x + 2)

The sum of two numbers is x. If one of the numbers is 12, what is the other?

x - 12

The difference of x and a number is 6. What is the other number?

x - 6

In a triangle, the measure of the second angle is twice the measure of the first angle. The third angle is equal to the sum of the other angles.

x, 2x, 3x