So whats the answer. please help me I got a test of this
Answer:
50
Step-by-step explanation:
It will be 69 degrees.
(x-1)+x+43=180
2x+42=180
2x=138
x=69
This looks like scalar matrix multiplication. The idea here is to multiply the scalar 3 by each item inside the matrix.
Doing so leads to the answer [3 -12 15 -21]
Side note: I'm assuming the matrix given to you has 1 row and 4 columns.