Evaluate each expression if r = - 7, s = 4, and t = - 8.

3st

a.

-84

c.

-96

b.

96

d.

168

A 4 -ft vertical post casts a 12 -in shadow at the same time a nearby cell phone tower casts a 126 -ft shadow. How tall is the cell phone tower?

Can there be a linear trend if there is no positive or negative association

Sarah's brother pays her $ 0.10 per minute to watch his guinea pig. If Sarah want to earn $ 1.50, how many minute will she need to watch his guinea pig.

If a scientist mixed 20% saline solution with 70% saline solution to get 10 gallons of 30% saline solution, how many gallons of 20% and 70% solutions were mixed?

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What is the solution to the system of equations? 4x-8y=-16 x-2y=-8 a. Use the substitution method to justify that the given system of equations has no solution. b. What do you know about the two lines in this system of equations?

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Find the value of x. (2x + 30°

Whats 9*2? i cant figure it out even with a calculator

Evaluate 3 - 24 - 8 + 32