Question

Please explain all work and will get brainiest


1. Which ordered pair is a solution of the equation
y = −11x + 4?
a. (0, -7)
b. (-1, -7)
c. (1, -7)
d. (2, 26)


2. A plumber charges $65 per hour to fix a leak. What
is an equation that relates the total cost of a leak
repair c to the number of hours, h, it takes the
plumber to fix the leak?



3. Solve for x:
3(2 − 5) = 4 + 33



4. Solve for x (literal equations):
c = b – bx

Answer 1

1) You need to graph this one in order to find out the ordered pair. Your y-intercept is positive 4, so that's where you should start. From there, your slope is negative 11 so you'll go down 11 times and move one over. The line should go across the ordered pair of (1, -7). So, your answer is C (1, -7).

2) c = 65h
In this equation, c represents the total cost. 65 is the price charged per hour to fix a leak. So, if I were to say it took a plumber two hours to fix a leak then my equation would be:

c = 65(2)
c = 130

Thus, the cost is $130.

3) The problem says solve for x, however, I don't see the input of x anywhere.

4) c = b - bx

c = b(1-x)

c/b = 1 - x

c/b - 1 = -x

-c/b + 1 = x

This equation is read as: negative c over b plus 1 equals x