## Find the slope: 4x C 5y = 20

Find the slope: 4x C 5y = 20A . 5/4B . 4/5C . - 4/5D . - 5/4E . - 4View AnswerAnswer: B Explanation: The equation form for slope is y = mx + b, in which m is slope.

## What is the length of the line XY?

On a real number line, x = -4 and y = 7. What is the length of the line XY?A . 11B . 3C . - 11D . 7E . 10View AnswerAnswer: A Explanation: Measure the length of the line by adding the respective distances of each value from zero.

## If Dave drives at a steady speed of 50 miles per hour, how long will it take him to drive 10 miles?

If Dave drives at a steady speed of 50 miles per hour, how long will it take him to drive 10 miles?A . 20 minutesB . 10 minutesC . 15 minutesD . 30 minutesE . 12 minutesView AnswerAnswer: E Explanation: Since there are 60 minutes in an hour, this problem...

## If x = 3 and y = -1, then 3x2 + 2xy C 5 = ?

If x = 3 and y = -1, then 3x2 + 2xy C 5 = ?A . 18B . 24C . 12D . 14E . 16View AnswerAnswer: E Explanation: Substitute the given values into the equation, and then remember to observe the order of operations.

## Rex is four times as old as Ted. If the sum of their ages is 30, how old is Ted?

Rex is four times as old as Ted. If the sum of their ages is 30, how old is Ted?A . 5B . 8C . 10D . 6E . 12View AnswerAnswer: D Explanation: The ratio of Rex’s age to Ted’s age is 4:1; the sum of their ages can be...

## If x = -5, then |x - 7| =

If x = -5, then |x - 7| =A . -12B . 2C . 10D . -2E . 12View AnswerAnswer: E Explanation: Remember that absolute value is the distance from zero on a real number line, and therefore cannot be zero.

## Solve and simplify: 2/3 x 3/5 x 5/10 x 6/8 =

Solve and simplify: 2/3 x 3/5 x 5/10 x 6/8 =A . 0.2B . 0.5C . 0.15D . 0.25E . 0.333333333View AnswerAnswer: C Explanation: Fractions are multiplied by multiplying numerators by numerators and denominators by denominators. Some of the fractions in this problem can be simplified.

## How old was he last year?

John will be x in 7 years. How old was he last year?A . x + 7B . 1 C x - 7C . x + 8D . x - 8E . 7xView AnswerAnswer: D Explanation: The target age can be found by subtracting first seven and then one year...