Which polynomial correctly combines the like terms and expresses the given polynomial in standard form?

9xy^3 - 4y^4 - 10x^2y^2 + x^3y + 3x^4 + 2x^2y^2 -9y^4

a. -13y^4 + 3x^4 - 8x^2y^2 + x^3y + 9xy^3

b. -13y^4 + x^3y - 8x^2y^2 + 9xy^3 +3x^4

c. 3x^4 - 8x^2y^2 + x^3y + 9xy^3 - 13y^4

d. 3x^4 + x^3y - 8x^2y^2 + 9xy^3 - 13y^4

87%

step-by-step explanation:

apex answer

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh

step-by-step explanation: