Answer:
Explanation:
<u>make x the subject in equation 2,</u>
5x + y = -3
y = -3 - 5x __ equation 2
<u>using substitution method,</u>
-4x + 3(-3 - 5x) = 29
-4x -9 -15x = 29
-19x = 38
x = -2
Find y,
y = -3 - 5x
y = -3 - 5(-2)
y = 7
Step-by-step explanation:
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n 3 is the correct answer okay
3rd option
the ratio of b : c is the cos77° , that is
cos77° = = ≈ 0.224951054.