Math Problem Solver

Solve the following systems of equations using Cramer’s Rule:

7𝑥 + 2𝑦 + 𝑧 = 21

3𝑦 − 𝑧 = 5

−3𝑥 + 4𝑦 − 2𝑧 = −1

a(3a+2)-2b(b-4)

s=(.1R+C)/(1+R)

what is 1 over 4 as a fracshon

2+6(5y+1)

lines of symmmetry on an pentagon

2y(y-5)

5/12 divided by 5/6

7/15 divided by 7/8

-2+4/5h-1