the beach is very crowded today! Everybody got to the beach by driving, biking, or walking. If 30% walked and 45% drove what percent biked to the beach?

25% biked to the beach

Step-by-step explanation:

We know a whole is 100%

We first have to do

30+45=75

then we can do

100-75=25

25%

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

so what is the problem what are they asking you to solve

step-by-step explanation:

so what is the problem what are they asking you to solve