This is the concept of algebra. from the given equation;
y-9+9=-17+9
The original equation was y-9=-17
The subtraction was undone by applying inverse operation of adding 9 to get;
y-9+9=-17+9
y=-8
The aim of doing this was to obtain the value of the unknown which is y
Answer:
A gallon of diesel weighs 7 pounds.
Step-by-step explanation:
Answer:
80 oz
Step-by-step explanation:
There are 16 ounces in a pound, so:
5 lbs (16 oz/1 lbs)
Multiply the 2 and you get 80 oz.
Multiply each of "2x" and "-1" by 3 in turn: 6x - 3 (answer)
<h3>
Answer: y = 12/(x^2)</h3>
============================================================
Explanation:
"y varies inversely as x^2" means y = k/(x^2) for some constant k.
Plug in (x,y) = (2,3) and solve for k
y = k/(x^2)
3 = k/(2^2)
3 = k/4
3*4 = k
12 = k
k = 12
The original equation updates to y = 12/(x^2)
As a check, plugging in x = 2 should lead to y = 3
y = 12/(x^2)
y = 12/(2^2)
y = 12/4
y = 3 ... we get the proper y value, so the answer is confirmed.
