Linear Function practice (need help)

50, 75

Step-by-step explanation:

y=mx+b

when x=0 y=75 ⇒ 75=0*m+b ⇒ b=75

when x=1 y=125 ⇒ 125=m+b ⇒ m=125-b=125-75=50

{3 + i, 3 - i, 3, -1}

step-by-step explanation:

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