Which describes a method for solving systems of equations in which you

plug in an expression for one variable written in the terms of the other?

When would you add in an expression?

What is the y-intercept of the line given by the equation y=5x-21 O A. (0.21) O B. (0,5) O C. (0, - 21) O D. (0,-5)

Solve 7*a + 2 = 42 - 3a

Divide 7/15 by 3/5 what do i get?

The trapezoid below has an area of 1575 cm. What equation could you solve to find the height of the trapezoid

Nine times the sum of a number and 3 is 2

Determine whether the given set S is a subspace of the vector space V. A. V={/mathbb R}^2, and S consists of all vectors (x_1, x_2) satisfyingx_1^2 - x_2^2 = 0. B. V=M_n ({/mathbb R}), and S is the subset of all symmetric matrices C.

Name three angles that sum to 180 degrees

Count back by one with the number 953

Write two multiplication sentences that have a product of 16