A father who is 42 years old has a son and a daughter. The daughter is three times as old as the son. In 10 years, the sum of all their ages will be 100 years. How old are the two siblings at present?

Use mental math to solve the equation x-16=14

A pond 85 feet across; 1 inch = 4 feet

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The doubling time of a population of flies is 5 hours. by what factor does the population increase in 30 hours? By 1 week?

Two independent simple random samples are taken to test the difference between the means of two populations whose variances are not known, but are assumed to be equal. The sample sizes are n1 = 32 and n2 = 40.

What is an equivalent fraction for 1/3

Use the distributive property to simplify the expression. -7 (8x - 3) + x A. x + 10 B. - 15x + 4 C. - 9x - 4 D. - 55x + 21

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All of the following equations have the same solution except ___. 3m+2=-10 2-3m=-10. - 10=-3m+2. - 3m+2=-10

Solve the inequality for x. - 4x + 6 < 50