Here is an old brainteaser by the central asian scholar biruni (973−1048). if 10 dirhams (a unit of currency) earn 5 dirhams of profit in 2 months, how much profit will 8 dirhams earn in 3 months?

10 units earn a profit of 5 in 2 months

that means

1 unit earns a profit of 0.5 in 2 months

that means

1 unit earns a profit of 0.25 in 1 month

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8 units earn a profit 8*0.25=2 in 1 month

8 units earn a profit of 3*2=6 in 3 months

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

step-by-step explanation:

answer: 7. if the functions had a negative leading coefficient and is of even degree, which statement about the graph is true?

step-by-step explanation: