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3 years ago

Part A

Mathematics

2 answers:

7nadin3 [17]3 years ago

7 0

Answer:

Options A , B and D are fulfilling the requirements.

Step-by-step explanation:

Derek has $80 to spend on used books. Hardcover books cost $10 each, and paperbacks cost $20 each.

Let x be the number of hardcover books and y be the number of paperback books Derek can buy.

The total books he can buy are $10x+20y \leq80$

A. (0, 4) substituting x as 0 and y as 4

$0(10)+4(20)$

= 80

B. (2, 3) substituting x as 2 and y as 3

$2(10)+3(20)$

= $20+60$

= 80

C. (7, 2) substituting x as 7 and y as 2

$7(10)+2(20)$

= $70+40$

= 110

D. (8, 0) substituting x as 8 and y as 0

$8(10)+0(20)$

= 80

Hence, options A , B and D are fulfilling the requirements.

maxonik [38]3 years ago

6 0

The answer is A, B, and D.

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3 years ago

Sara and Geena can both do flips in the air. The ratio of the number of flips Sara can do to the number of flips Geena can do is

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Answer:

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Step-by-step explanation:

Let represent number of Sara flips by S

And number of Geena flips by G

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∴G = S + 120

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The original ratio (G:S) = (72:192)

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And Sara increases her flip by 3

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Answer:

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