A plumber charges a one-time fee of $50 plus a fixed hourly rate (h) in dollars. The plumber works at a customer's house for 2 hours and charges a total of $100. Find the hourly rate the plumber charges.

$25 an hour

Step-by-step explanation:

use this equation y = hx + 50

y is the money earned and x is the hours worked

plug in 100 for y and 2 for x

100 = 2h + 50

solve for h

50 = 2h

25 = h

he charges $25 an hour

no not all of them.

step-by-step explanation:

some of them have a square base.

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: