Answer:
y = 5
z = 55
Step-by-step explanation:
90 - 35 = 55
z = 55
7y = 35
![\frac{7y}{7} = \frac{35}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B7y%7D%7B7%7D%20%3D%20%5Cfrac%7B35%7D%7B7%7D)
y= 5
Answer:
20) the answer is -43
21) the answer is 25
22)the answer is -5
Step-by-step explanation:
20) ![\frac{p(p+n^{2})}{6}](https://tex.z-dn.net/?f=%5Cfrac%7Bp%28p%2Bn%5E%7B2%7D%29%7D%7B6%7D)
n=-7
p=-6
we have:
![\frac{-6*(-6+(-7)^{2})}{6}\\\\\frac{-6*(-6+49)}{6}\\\\\frac{-6*(43)}{6}\\\\\frac{-258}{6} \\-43](https://tex.z-dn.net/?f=%5Cfrac%7B-6%2A%28-6%2B%28-7%29%5E%7B2%7D%29%7D%7B6%7D%5C%5C%5C%5C%5Cfrac%7B-6%2A%28-6%2B49%29%7D%7B6%7D%5C%5C%5C%5C%5Cfrac%7B-6%2A%2843%29%7D%7B6%7D%5C%5C%5C%5C%5Cfrac%7B-258%7D%7B6%7D%20%5C%5C-43)
21) mp-(p-(m-n))
m= -1 n=-6 p=-10
-1*-10-(-10-(-1-(-6)))
10-(-10-(5))
10-(-15)
10+15=25
22) ![m-\frac{m+m}{2} - n](https://tex.z-dn.net/?f=m-%5Cfrac%7Bm%2Bm%7D%7B2%7D%20-%20n)
m=1 n=5
1- ![\frac{1+1}{2} -5](https://tex.z-dn.net/?f=%5Cfrac%7B1%2B1%7D%7B2%7D%20-5)
1- 2/2 -5
1-1-5 =-5
What problem is it that you need help with?
Answer:
As attached
Step-by-step explanation: