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Alja [10]
2 years ago
9

Irina predicted that she would sell 75 books, but she actually sold 95 books. Which expression would find the percent

Mathematics
1 answer:
kolbaska11 [484]2 years ago
6 0

Percent error = |actual error - expected error/ expected error| * 100%

(|75-95|)/95 = 0.21

0.21 * 100% = 21% error

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2x+1

The total number of hours she worked this three days in two more than five the number of hours she worked on monday, this can be express as :

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Now , once we have all the expressions we add the expressions of the days and equate them to the total

x+(x+3)+(2x+1)=5x+2

Now we solve the equation

x+(x+3)+(2x+1)=5x+2\\x+x+3+2x+1=5x+2\\4x+4=5x+2\\5x-4x=4-2\\x=2

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