Aworker at a snack stand opened a new box of cups. the first day he used 30 cups , the second day the worker used 15 percent of the remaining cups. a total of 90 cups were used the second day. what was the original amount of cups in the box before any were used?

plz asap will give u brainliest : )

Step-by-step explanation:

the first day he used 30 cups

the second day he used 15% of the remaining cups...a total of 90 cups were used on second day.

so 15%of the remaining cups = 90so if u let x be the total cups, then the remaining cups would be x - 30

15% of (x - 30) = 90turn ur percent to a decimal..." of " means multiply

0.15(x - 30) = 90

0.15x - 4.5 = 90

0.15x = 90 + 4.5

0.15x = 94.5

x = 94.5 / 0.15

x = 630 total cups <==

lets check..

start with 630 cupsused 30 the first dayleaving u with 600 cups15% of the remaining cups = 90so 15% of 600 = 90lets check it

15%of 600 = 0.15(600) = 90...yep, thats correctthere were 630 cups in the new un-opened box

oof

step-by-step explanation:

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap