C. 200
They earn $2.50 per box of markers, meaning that to make $500 they have to sell 200. [500/2.5=200]
12%=(3+10%*x)/(20+x)
x=30
add 30 pounds of the second alloy
Answer:
v = 13.5 m/s is the answer
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Answer:
2). The oak tree is 33ft tall.
Step-by-step explanation:
Same process as I explained before
Answer:
3). The building is 30ft tall.
Step-by-step explanation:
Same process as I explained before
Answer:
x=-3
Step-by-step explanation: