if the expression 3x + 2 is equal to 15 for some value of x, then which of the following is the value of 9x + 5 for the same value of x? Do NOT solve for x. Use mindful manipulations.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.