vannah94
30.06.2019 •
Mathematics
If a + b + c = -1 and x + y = 7 what is -9a-7x-9c-9b-7y
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Ответ:
-40
Step-by-step explanation:
-9a-7x-9c-9b-7y
group the terms
-9a-9b-9c -7x-7y
factor out -9 and 7
-9(a+b+c) -7(x+y)
replace a+b+c with -1 and x+y with 7
-9 (-1) -7(7)
9 -49
-40
Ответ:
Volume A= Volume B
Step-by-step explanation:
we know that
The volume of the prism is equal to the area of the cross section multiplied by the length of the prism, because the area of the cross section is equal to the area of the base
step 1
Find the volume of the prism A
The area of the cross section is equal to
The volume is equal to
step 2
Find the volume of the prism B
The area of the cross section is equal to
The volume is equal to
therefore
VA=VB
Volume of the prism A is equal to the volume of the prism B