Please help Show work

A 55
B 20
C 38
D 70

x = 16

Step-by-step explanation:

Both the angles are complementary (add up to 90°)

=> (4x - 10) + (x) = 90°

=> 5x + 10 = 90°

=> 5x = 80°

=> x = 80/5

=> x = 16

Hope this helps!

x = 20

Step-by-step explanation:

→ Recall how many degrees on a straight line

180°

→ Form an equation

90 + 4x - 10 + x = 180

→ Simplify

80 + 5x = 180

→ Minus 80 from both sides

5x = 100

→ Divide both sides by 5

x = 20

step-by-step explanation:

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: