Answer:
The first one is
5x * 10
(x is the variable) TIMES 10
Step-by-step explanation:
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Ok so we have a ratio of 1:3 here. (1 is for the hour of tv and 3 is for hours of homework)
3 can go into 15 (hours of homework last week) 5 times. That means we must multiply 3 by 5 to get 15 so that we can fit the ratio to last week. Because we did that, we have to multiply 1 by 5 as well.
1 × 5 = 5 hours of homework!
Has a height of 12, because 12*9*5=180