The measures of an angle and its supplement differ by 40. what are the measures of the angles? hint: an angle and its supplement have degree measures whose sum is 180. a. ; 70, 30 b. ; 40, 140 c. ; 70, 110 d. ; 60, 120

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

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.

i am not sure :

step-by-step explanation: