Y = 8x + 12
Now, plug in the 60.
60 = 8x + 12
Subtract 12 from both sides.
48 = 8x
Divide both sides by 8.
6 = x
Swap sides.
x = 6
It would take 6 hours for the pool to have 60 inches of water inside it.
The answer for 9 and 10 is B
Part A is correct. We have x+15 as the length and x+3 as the width. Convention usually has the width be the smaller of the two.
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Part B will have you replace x with 8 and simplify
length = x+15 = 8+15 = 23
width = x+3 = 8+3 = 11
the rectangle is 23 yards by 11 yards, so the area is 23*11 = 253 square yards
8500:78=
100times 7800 that it is less than 8500
So 8500-7800=700
Again you think how many 78 are in 700 it is enough you guess
8 times 78 is 624
Good job
700-624=76 that it is less than 78
So, 100+8=108
And reminder is 76
8500= 108.78+76
