Abox is filled with 12 brown cards, 5yellow cards, and 3 green cards. a card is chosen at random from the box. what is the probability that it is a brown or a green card

probability (brown or green card) = total number of cards of brown and green / total number of cards of all color

so

total number of brown and green card = 12 +3 = 15

total numbers of card = 12+5+3=20

probability (brown or green) = 15/ 20 = 3/4 = 0.75

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

step-by-step explanation: