Elliot is riding in 100 mile bike race to raise money for charity so far he has completed 7/10 of the race how far has elliot bike

Elliot biked 70 miles

Explanation:

We are given that the total distance of the race is 100 miles

We are also given that Elliot covered of this distance

To get the number of miles covered by Elliot, we will simply multiply the ratio of the covered distance () by thetotal distance of the race (100 miles)

This is done as follows:

Distance covered = miles

Therefore, Elliot biked for 70 miles

Hope this helps :)

step-by-step explanation:

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