Step-by-step explanation:
SA=ph+2A, that is, perimeter × height+ twice area
p=21+20+29=70cm
h=22cm
70×22=1540cm
A=1/2 ×20×21=210×2=420
1540+420=1960cm2
Answer:
185 minutes.
Step-by-step explanation:
It is possible to model an equation for this, such that

where x represents the number of minutes.
Then, you solve for x:

Answer:
simplified is
x
^5
y
^15
z
^10
Step-by-step explanation:
Answer:you divide 90 by 4
Step-by-step explanation:
7 because 7•3=21 and if he has as twice much as you 7•2=14 & 14+7=21 books together