your friends show you a coin collection .in it 45/50 of the coins are quarters. what percent of the coins are quarter

90%

Step-by-step explanation:

45 : 50

45 / 50 = 0.9

0.9 x 100 = 90

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

12cm

the answer is d