You will flip the signs when you have to multiply or divide your equation by a negative integer.
Answer:
x=1/2, y=2;
Step-by-step explanation:
First pair:
2x-5y =-9
4x+5y=12
Add them together:
6x=3
x = 1/2
2(1/2) - 5y =-9
1-5y = -9
1+9=5y
y=10/5=2
Answer:3.63
Step-by-step explanation:because if we divide 18.15 by 5 is equal 3.63.
Answer:
Step-by-step explanation:
We have



to the third decimal is 2.930 (i might be wrong on the rounding part)
Answer:
65
Step-by-step explanation:
115-180=65 degrees