Set -x+7 = 3x+10
4x = -3
x = -3/4
y = 7.75
Answer:
Science Test
Step-by-step explanation:
If he missed 12 points on each test (-12) he missed 2 questions on the math test and 4 questions on the sceince test.
Answer:
3rd Matrix
Step-by-step explanation:
When you start putting the coefficients in as the matrix, you see that -9 has to be the 1st number, so that eliminates choice B and choice D as answers. You are left with choices A and C. C is the correct choice because when you plug in the second equation, your coefficient is -5, not 0.