I'm pretty sure $39.31 was the original sales cost because if you use proportions to find out what is 7.2% of 42.35 ( what you get you you subtract 45 by 2.65). Your equation would be x/42.35 = 7.2/100. 42.35 is the whole because tax is adding money onto your original cost, making that the part. When you cross multiply you get 100x = 304.92. Then you divide by 100 on both sides to isolate the variable, to get x = 3.04. But you don't stop there. Since 3.04 is only the 7.2%, you have to subtract that by 42. 35 to get a sum of 39. 31 as your total.
If it's like the in and out things, I think i can help. So a number goes in and and comes out. What is the rule? What happened from the in to the out?
Answer:
y=h(x)-8
Step-by-step explanation:
it shifted down 8 units
Answer:
20 by 20
Step-by-step explanation:
square root of 400 is 20
20 times 20 = 400
490x + 700y <span>≤ 4000. "No more than" is a rephrase of "less than or equal to".</span>
