a circle has a circumference whose length is 25pi. find the length of an arc whose central angle is 90 degrees

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4