court3138
14.04.2020 •
Mathematics
When a number is decreased by 4.5%, the result is 90. What is the original number to
the nearest tenth?
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Ответ:
x = 94.2
Step-by-step explanation:
Let x represent the number
x - 4.5%x = 90
x - 4.5/100x = 90
x - 0.045x = 90
0.955x = 90
Divide both sides by 0.955(the coefficient of )
x = 90/0.955
x = 94.2
Ответ:
25 divided by 5 = 5, so the unit rate is 5 circuit boards every minute.