I think you should combine like terms
Answer:
b 3x +7y =59
Step-by-step explanation:
x is water balloons at 3 each and y is t-shirts at 7$ each.
The answer is d. 39.
Rectangle: 6*3 = 18
Big Triangle: (5*6)/2 = 15
Smaller Triangle: (4*3)/2 = 6
18+15+6=39.
Hope this helped☺☺
For 8) the answer is 125 because V=a^3=5^3=125
for 9) V=384m i think but I'm not sure about it. I usually skip extra credit, I don't recommend it though. You should aim for above and beyond and not average.