P = (V^2R) / (R+r) ^2

V, R are constants; r is a variable

Find dP/dr

Tom is 4 more than twice Andrews age Sarah is 8 less than 5 times Andrews age of Tom and Sarah are twins how old is Andrew

7.4z-5 (-1.6z+2.4) Expand the expression and combine like terms:

Determine the GCF of 14, 15, and 21

A fence is built around a rectangular garden that is 8 1/2 feet by 6 1/3 feet Fencing comes in panels. Each panel is 2/3 of a foot wide. How many panels are needed? Explain or show your reasoning

Convert 4/6 to a percent.

Which equation is 69 is greater than x

If x = 7, y = 1 and 2 = 1, then evaluate the following expression: X - y + z =

Solve 0.06*0.7+0.03=0.06 * (-0.2) + 0.03

What fraction of 1 pint is 1 cup

Solve m² + 8m = - 3 by completing the square. (Use a comma to separate multiple values.) What the answer for this?