If u multiply the first equation by -4, u get -2x - y = -20
and when u add the 2 equations..
-2x - y = -20
2x + 3/8y = 5
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0 - 5/8y = -15.....u notice that the x terms r eliminated.
You multiply fractions simply by multiplying numerators and denominators with each other:

Answer:
D
Step-by-step explanation:
complementary sums until 90 degrees
90-13=77
Answer:
the answer would be 0.
Step-by-step explanation:
the line would go straight down the middle.