Aschool club needs 350 feet of rope for a project. they have the amounts of rope listed below.
4 pieces of rope that are each 14 yards in length
1 piece of rope that is 10.5 yards in length
1 piece of rope that is 101.25 feet in length. how much additional rope , in feet, does the school club need in order to have enough rope for their project?

49.25 feet

Step-by-step explanation:

1 yard = 3 feet

A school club needs 350 feet of rope for a project.

They have 4 pieces of rope that are each 14 yards in length.

14 yards = 14 × 3 = 42 feet

4 ropes of 42 feet = 42 × 4 = 168 feet

1 piece of rope that is 10.5 yards in length = 10.5 × 3 = 31.5 feet

1 piece of rope that is 101.25 feet in length = 101.25 feet

Total rope in length = 168 + 31.5 + 101.25 = 300.75 feet

They need additional rope = 350 - 300.75 = 49.25 feet.

They need additional 49.25 feet rope for their project.

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

i believe it's a.

i'm not sure on this one, most likely correct.