Astudents cost for last semester was $2100.she spent $420 of that on books. what percent of last semesters college costs was spent on books?

 The required percent of cost that was spent on books is 20%.

Step-by-step explanation:  Given that a student's cost for last semester was $2100 and she spent $420 of that on books.

We are to find the percent of last semester's college costs that was spent on books.

The total cost of last semester, C = $2100

and

the cost of books in the last semester, S = $420.

Therefore, the percent of last semester's college costs that was spent on books is given by

Thus, the required percent of cost that was spent on books is 20%.

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

u also answered this so i think u would know but i am here to

put in or use mine

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11