X+3y=7 and y=2 than x equals?

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