(1).factor the expression: 15n- 18
a: 15n-18
b: 3(5n-6)
c: 5(3n-13)
d: 3(5n-18)

(2).solve for x: -2.3(x-1.2) = -9.66
a: 3.2
b: 9.7
c: 11.6

answer: 21$

step-by-step explanation:

$42 / $14 = 3   (ratio 3: 1)

$7 x 3 = $21

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