What is the numerical expression of the sum of 21 and 4 doubled

As part of Kayla's exercise program, she either runs 6 miles/day or rides her bike 10 miles/day. Her new goal is to cover a minimum distance of 200 miles, with at least 15 of the days running.

What do average mean in math

Find the exact values of the following, giving your answers as fractions. 3^{-2} 4^{-3} 2^{6}

A right triangle has sides of length 3, 4, and x. Find x, if x were one of the legs. (Round your answer to the nearest hundredth)

Given tan (A) = 2 and A is in Quadrant I, find tan (2A). -1/3 2/3 -4/3 -2/3

List the sets that - 6 belongs to: whole numbers, integers, rational numbers, irrational numbers, and real numbers.

Rose's stamp collection is 7 less than half of Van's stamp collection, x. Which expression represents the total number of stamps that Rose has? 7x-12 12-7x 12x-7 7-12x

The perimeter of Rectangle A is four times that of Rectangle B. Rectangle B is 7 cm long and 2 cm wide. Given that Rectangle A and Rectangle B are similar, what is the perimeter of Rectangle A?

Simplify 32 ⋅ 35. Simplify 4.510.

What is the tangent ratio an angle of a triangle whose opposite side is 3, adjacent side is 4, and hypotenuse is 5.