Bro i did the same test [i picked c. for my answer]
Answer:
Step-by-step explanation:
<u>The volume is:</u>
- V = Bl = 1/2(ah)l
- V = 1/2(7*8)*11 = 308 cm³
its 14n+21. 7×2n is 14n, and 3×7 is 21
Answer: x = 8, y = 2, coordinates (8,2)
Step-by-step explanation:
2x = 4y + 8 (divide by 2 to get value of x)
x = 2y + 4
(now substitute x into the second equation to find value of y)
2y + 4 - 2y = 4
2y - 2y = 4 - 4 (divide by 2 to get value of y)
y - y = 2 - 2
y = 2
Now plug in value of "y" to get value of "x".
x - 2(2) = 4
x - 4 = 4
x = 8
Coordinates (8,2)