What is (81x^2 - 4y^2) square units factored?

Renee has 7 one dollar bills, 1 five dollar bill, and 4 ten dollar bills. How much money does Renee have in all?

How to find dy/dx by implicit differentiation of 3x^2-4y^2=25?

Simplify the expression 2.75j + 2.25 - 1.5j + 3

Simplify the expression cosxcscxtanx

The amount of time t (in hours) that it takes to fill a swimming pool varies inversely with the pumping rate r (in kiloliters per hour). The constant of variation is 4. Find how long it will take to fill the pool when the pumping rate is 3.2 kL/hr A.

Convert the measurement to the specified equiv necessary. 46,745,534 yd? to mi?

What is 1.665 as a fraction

What is the approximate value of log625?

What is 4*6? after that, how about 9*9

Find the zeros of the function: y = x (x + 2) (x+3)