I need help with 1-3 and 5-6 pls

ok plus all all the equation

(note - an equation contains an is equal to sign [=] and if a problem does not have an is equal to sign then it becomes an expression)

just add all of them making an equation like

2n° + 55° + 49° = 180° (angle sum property)

2n° + 104 = 108°

2n° = 108° - 104

i.e., 2n° = 76°

n = 76/2 therefore,

n = 38

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.