Simplify this expression.
7x(9x2)

a) 16x2
b) 63x2
c) 16x3
d) 63x3

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

How many $20 bills do you need to have to make $280

What is the difference between the predicted value and the actual value