D should be the correct answer :)
Answer:
20 ; $135 ; service charge for 3 hours spent is $135
Step-by-step explanation:
Given that :
Service fee equation model :
C(h)= 75 + 20h
C = total cost of the service call
h = number of hours the plumber spends working on the problem
The charge per hour is the gradient or slope of the linear equation. From the equation, the slope is of the equation is related to bx from. The general form of a linear equation where b = gradient or slope(charge per hour) and x = number of hours
bx = 20h
b = 20
Charge per hour = 20
C(3) = 75 + 20(3)
75 + 60 = 135
This means that total service call charge for a plumber who spends three hours fixing a problem is $135
16:30
16/30
16 to 30
is the ratio of girls to the classmembers
Hope this helps!
Answer:
x=-8, y=76/3
Step-by-step explanation:
I solved for substitution since I didn't know exactly what you're solving for.
Answer:
84 juice bottles
Step-by-step explanation:
Given the ratio of grapefruit juice, pineapple juice, and tomato juice bottles as
3:1:2
Let the total number of bottles available be R
If there are 14 pineapple juice bottles, then
1/(3 + 1 + 2) * R = 14
1/6 * R = 14
multiply both sides by 6
R = 14 * 6
= 84
This means there are 84 bottles in all
