Given: m∠A + m∠B = 90° (Definition of Complementary Angles).
Given: m∠B = (5x + 8)°
A) m∠A = 180° + (5x + 8) is your answer choice:
Why it isn't the others:
B) m∠A = 90° - (5x + 8)
You are solving for complementary angles (90° in total when combined), so you subtract the measurement for B (5x + 8) to get A.
C) m∠A = 180° - 2(5x + 8)°
You double the complementary angle to solve for the supplementary. Essentially, just divide this answer by two to get the complementary angles.
D) m∠A = 82 - 5x
I was confused by this one, but essentially they just did one step of the isolating the variable, which was subtracting 8 from both sides. They did not finish isolating the variable however.
Answer:
x^2-49
Step-by-step explanation:
first you have to combine like terms
//hope this helps//
Well the constant of variation is vital yet if there is a graph, table, or two points provided then you can find the slope. You will have to use different equations and steps of course.
Answer:
1764 cm²
Step-by-step explanation:
(45 * 12 * 2) + (45 * 6 * 2) + (12 * 6 * 2) = total surface area
= 1764
Answer:
Length = 8 m
Width = 30 m
Step-by-step explanation:
Let length = x.
Then width = 3(x + 2).
P = 2(L + W)
76 = 2[x + 3(x + 2)]
76 = 2[x + 3x + 6]
76 = 2[4x + 6]
8x + 12 = 76
8x = 64
x = 8
3(x + 2) = 3(10) = 30
Answer:
Length = 8 m
Width = 30 m
