This is a fraction btw. I need help.

(y^4)^5
= (must simplify also)
(y^7)^6

1 / y^22

Step-by-step explanation:

We multiply bracket powers and add powers if no brackets when multiplying same numbers on same line (denominator with denominator and numerator with numerator, we could cross multiply with (y^7)^6 / (y^7)^6 but workings below show when we simplify then subtract powers last step to reduce the fraction with no action of cross multiply.

(y^4 )^5 = y^20

(y^7)^6 = y^42

= y^20/ y^42

= 1 / y^22

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2

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

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.