C
work:
75 is equal to 2x+15
75-15 = 60
60/2 = 30
x=30
Answer:
x=4.875
y=-0.25
Step-by-step explanation:
4x – 2y = 10
2x-y=10
y=2x-10
4x + 6y = 18
2x+3(2x-10)=9
8x=39
x=4.875
y=2(4.875)-10
y=-0.25
Divide $31.75 by 2 to find out the cost for 1 pack. Then multiply that total times 3 to get the total for 3 packs.
31.75/2 = 15.875
15.875 x 3 = 47.625, rounded to $47.63
35.937 inches cubed
To find volume: <em> length </em><em>x</em><em> width </em><em>x</em><em> height</em>
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