Which expression is equivalent to 21 + 49? a. 7(3 + 49) b. 7(3+7) c. 7(14 + 42) d. 7(14 +49)

What is 20+(5 x 2/5 )+ 3 show your work

If the dimensions of a rectangular prism are 5 ft x 3.5 ft x 2 ſt, what is the surface area?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11