<h2>
c = d/a - b</h2>
Step-by-step explanation:
1. Divide each term by "a," and simplify.
c + b = d/a
2. Subtract "b" from both sides of the equation.
c = d/a - b
Subtract 612 from 8.7 to get 603.3 :)
Answer:
The answer is
<h2>

</h2>
Step-by-step explanation:
The statement
y varies inversely with x is written as

where k is the constant of proportionality
To find k substitute the values of x and y into the equation
From the question
y = 4
x = 6
We have

Cross multiply
k = 4 × 6
k = 24
So the formula for the variation is
<h2>

</h2>
Hope this helps you
I think I can help with a few...
16. They are equal because of distributive property.
18. 12*5 and 3/8 -> 12/1*43/8 -> 516/8 -> 129/2 -> 64.5
19. Everything is right until the last step, where it should be 6 and 2/3.