Answer:
white to grey is 13:12
Step-by-step explanation:
The grid has 25 squares, shade 12 of them grey
I think the answer is 22mn2+66m2n-64 since there are no more like terms
Jenny is incorrect in her calculation.
For every time that Jenny's brother washed dishes, Jenny washed dishes 4 times. This tells that the the times they washed dishes occur in the ratio 4 :1. If Jenny's brother washed dishes 8 times, Jenny has to have washed dishes
times. The way Jenny's is doing the calculation implies that his brother washed dishes
times. He calculation yields a wrong result.
$580 laptop/ $40 earned a week = about 14.5 weeks to buy the laptop