Im not for sure if i did this right but my calculator says that its 420.
hope i helped.
Answer:
140 inches
Step-by-step explanation:
one decagon has 10 sides
14*10= 140
130÷5=26 20÷5=4+26=30 each payed 30 dollars for the buffet
Answer:
<h2>22 hours and 10 hours </h2>
Step-by-step explanation:
let the jobs be x and y, so that
x+y=32--------1
9x+7y=248----2
x=32-y
substitute x=32-y for x in equation 2 we have
9(32-y)+7y=248
open bracket we have
288-9y+7y=248
-2y=248-288
-2y=-40
2y=40
divide both sides by 2 we have
y=40/2
y= 10 hours
subtitute y=10 for y in equation 1 to find x
x+10=32--------1
x=32-10
x=22
x=22 hours
