If x = -5, then |x - 7| =
Answer : 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 =
Answer : C
Explanation: Fractions are multiplied by multiplying numerators by numerators and denominators by denominators. Some of the fractions in this problem can be simplified.
If Dave drives at a steady speed of 50 miles per hour, how long will it take him to drive 10 miles?
Answer : E
Explanation: Since there are 60 minutes in an hour, this problem can be solved with the following equation: 50/60 = 10/x
John will be x in 7 years. How old was he last year?
Answer : D
Explanation: The target age can be found by subtracting first seven and then one year from x.