How do I solve equations by using the substitution method

Since sq root 3 times sq root 3 is rational, the product of any two irrational numbers is rational. Which of the following best describes the statement? Answer A rational number is any integer, fraction, terminating decimal, or repeating decimal.

True or false: all things in the universe move

Which ordered pair is a reflection of (3, 7) across the x-axis?

A spruce tree is approximately the shape of a cone with a slant height of 20 ft. The angle formed by the tree with the ground measures 72º. Estimate the height of the tree. Round to the nearest foot.

What two whole numbers does √22 fall between? What two whole numbers does √62 fall between?

How much would a 185 pound person weigh on the moon

What is the simplified base for the function f (x) = 2 (3√27 (2x) ? 2 3 9 18

Solve the system of equations. y = 2x y = x2 - 15

What is the equation for twice a number gives 110

A study investigated whether boys are quicker at learning video games than girls. Twenty randomly selected boys and twenty randomly selected girls played a video game that they had never played before.