128 = 8d, because the product calls for multiplication to be performed.
There are 87 girls and 58 boys!
i divided 5 from 145 and got 29.
i multiplied 29 and 3 and got 87.
87 is the girls total.
then subtracted 87 from 145 and got 58.
58 is the boys total.
hope this helps!
X=-1
-1x2 + 5x-1 +7 = 0
-7+7 =0
0=0
You can use scale to solve. 5185/8.5=610
4845/610= about 8 hours.
