Suppose that 19 inches of wire costs 57 cents. at the same, rate how many inches of wire can be brought for 36 cents?

  12 inches

Step-by-step explanation:

Since you know your multiplication tables, you know that 57 = 3·19, so the wire is 3 cents for each inch. Then you also know that 36 = 3·12, so 12 inches of wire will cost 36 cents.

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You can also write the proportion ...

  19 in/(57 cents) = x/(36 cents)

Multiplying by 36 gives

  x = (19 in)·36/57 = 12 in

rectangular prism would best match the box of cards

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40