X+2y=10 6y=--3x+30 Use algebraic rules of equations to predict the solution to the system of equations.
1 answer:
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Answer:
C. 141.3
Step-by-step explanation:
Answer:
d = 9
Step-by-step explanation:
Calculate the slope m using the slope formula and equate to 3
m =
with (x₁, y₁ ) = (4, 6) and (x₂, y₂ ) = (d, 21)
m = , that is
= 3 ← multiply both sides by d - 4
15 = 3(d - 4)
15 = 3d - 12 ( add 12 to both sides )
27 = 3d ( divide both sides by 3 )
9 = d , that is
d = 9