Answer:
Step-by-step explanation:
to find the original price we will divide the known price by (1-discount)
original price= 84/(1-0.25)=84/0.75=112.00
the lamp was 112

Look at the graph picture I attached

c is the intercept, which is why the graph crosses the y-axis at +3
to find where it crosses the x-axis, we make y = 0

Well theoretically speaking you could but that would take a long time and 15 and 30 have a common factor of 5 and 15. So I think for this one you can't since there are two common factors.
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The ratio of free throws to miss throws = 4/3
Miss throws = 36
So, free throws would be = 36 * 4/3 = 48
So, your final answer is 48
Hope this helps!