The graph to the right shows the relationship between the time, x, and heartbeats, y. Which equation describes the relationship of resting heart rate on this graph? 1)y=2x. 2)y=x. 3)y=1.25x. 4) y=1.5x

oof cheaters cheat because they’re lazy that’s why i cheat xd

: )

step-by-step explanation:

ok then what happened.

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