Aplumber charges $30 for a house call and $20 per 1/2 of work. how much will the plumber charge for 4 1/2 hours of work at mrs. dimarco's house?

210$

Step-by-step explanation:

30 + (20 * 9) =

30 + 180 = 210

It's 20 * 9 because there is 8 halves in a 4, and an additional half makes it 9 halves.

20 times 9 :)

And, of course, the 30 for the house call to start off with.

Total: 210$

$210

Step-by-step explanation:

How may half hours in 4.5 hours?

4.5/0.5=9

Each half hour is worth $20.

9*20=180

9 half hours plus house call fee.

180+30=210

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3

what are ur choices?