Answer:
y = {1,2}
Step-by-step explanation:
5y^2 - 4y - 9 = y + 1
5y^2 - 5y - 10 = 0
5(y^2 - y - 2) = 0
5 (y - 2) (y - 1) = 0
y = {1,2}
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The way I figured this one out was saying that if it takes 2lbs to stretch it to 12 inches and 5lbs to stretch to 18 inches that means that 3 additional pounds = 6 inches. Therefore, each additional pound is 2 inches. We know already that with 2 lbs it was 12 inches in length and we can also say that 2 lbs = 4 inches. So subtract 4 from 12 and you end up with the answer of 8 inches.
You have to get a common denominator so
3 x 3 = 9
5 x 3 = 15
So now we have 9/15 + 4/15 which is 13/15.
The answer is 13/15
Answer:
70
Step-by-step explanation:
70 combinations of four books can be made from eight different books.
The time would be 1:24 pm
