Question

A swimming pool is being drained. The number of gallons of water in the pool changes with time t according to the equation G = -4t + 100.
Which equation correctly solves the given equation for t?
A. t = 4G - 100
B.t = -4G + 100
C.t = 100 - G/4
D. t = G - 100/4

Answer 1

subtract 100 from G first

Answer 2

G - 100 = -4t

Answer 3

Then you want to divide by -4

Answer 4

OK

Answer 5

what did you get?

Answer 6

-104

Answer 7

(G-100)/-4 = -4t/-4

Answer 8

Youre looking for a formula. Not a number

Answer 9

g=−4t+100

Answer 10

yes, but they want a formula for t. So we have to solve for t.

Answer 11

ok

Answer 12

To isolate t, we need to move 100 to the other side which gives us G-100 = -4T. How can we move -4 to the other side of the equation.

Answer 13

-4*t ?

Answer 14

We want to undo the multiplication -4*t. What undoes multlipication?

Answer 15

Division

Answer 16

ok

Answer 17

Divide both sides by -4. (G-100)/(-4) = -4t/-4t.

-4/-4=?

Answer 18

1

Answer 19

right so you have (G-100)/(-4) = 1*t

Answer 20

Do you see the answer?

Answer 21

a

Answer 22

We've solved the equation for t

Answer 23

d

Answer 24

We can distribute the negative on 4 over G-100 which gives us (100 - G)/4 = t

Answer 25

b

Answer 26

no c

Answer 27

yes c

Answer 28

thanks