Because of a heavy spring runoff, the shoreline of a lake increased from 10.0 miles to 13.8 miles. What was the percent of increase in the shoreline?

The percent of increase in the shoreline was 38%.

Step-by-step explanation:

Given that the shoreline increased from 10 miles to 13.8 miles because of the spring runoff, to determine the percentage by which the shoreline increased, the following calculation must be performed:

10 = 100

13.8 = X

((13.8 x 100) / 10) = X

(1,380 / 10) = X

138 = X

Thus, since 138 - 100 is equal to 38, the percentage by which the shoreline increased was 38%.

associative property of multiplication

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!