The relationship between rate of speed (r), distance traveled (d), and time
traveled (t) is given by the following
equation.
d
r =
t
If rate remains constant, which of the
following must be true?
A When t remains constant, d increases.
B When t decreases, d remains constant.
С When t decreases, d increases.
D When t increases, d decreases.
E When t decreases, d decreases.

college

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

b