The formula C = 2πr relates the radius r of a circle to its circumference C. Solve the formula for r.

John collected 150 nickels and dimes. He has 30 more nickels than dimes. How many of each does he have

If the third term in a geometric sequence is 20, and the fifth term in the sequence is 5, what is the ratio (multiplier) ?

The equation for a circle is x2-8x+y2-2y-8=0 . What is the equation of the circle in standard form?

How to round to the nearest cent

Translate sentence into an equation. 20 subtracted from three times a number is 6 more than the number

He uses 6 inches of yarn per bracelet. how many bracelets can sal make with 5 feet of yarn?

If the remainder on division of x^3+2x^2+kx+3 by x-3 is 21, find the quotient and the value of k. Hence, find the zeroes of the cubic polynomial x^3+2x^2+kx-18.

What is - 2, 0, 1.7, - 5/2 in order from least to greatest?

Four multiplied by the some number equals 32

Joe and grace are baking cookies they need a total of 2 cups of sugar for the recipe joe has 11/10 cups of sugar and grace has 3/4 of a cup of sugar without solving the problem do they have enough sugar explain your thinking