Brock is a plumber. he charges a flat rate of $40 to visit a house to inspect it's plumbing. he charges an additional $20 for every hour he spends inspecting or making repairs

C= 40 + 20h

Step-by-step explanation:

Brock is a plumber.

His flat rate to visit house, b = $40

Additional charge rate , h = $20 per hour  for inspecting and making repairs

Let he work for x hour.

Total charge by Brock for x hours, C

C = Fixed charge + Variable charge

C = 40 + 20h

where, h is number hours and C is total changes.

Hence, The equation which shows total charge is C= 40 + 20h

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

20%

step-by-step explanation: