13 + - 13 = 0 exemplifies which property

John is 5 years older than Mary. In 10 years, twice John's age decreased by Mary's age is 35, and John's age will be twice Mary's current age. Find their ages now.

Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,000 and $40,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired.

Solve the inequality 10 plus x is greater than 23.

Given f (x) = 5x-1 What is f (-2)

Can you solvefor x 3 (x+4) + 5x=-20

How many possible 3-digit numbers are evenly divisible by 33?

Solve the system of equations using the substitution method. y=-3x+7 x=-2y-16 Enter your answers in the boxes. x= y=

What is definition of equivalent fractions

What is the length of ef and the measure of d?

If the sum of the measure of two angles is 180º, which condition must be true?