I need help with polynomials i will mark brainiest if your correct multiply the following polynomials

question: -2r(8r+5)
A: -16r^2+5
B: -16r^2+10
C: -16r^2-10r
D: -16r^2-10

question: 4a(a^2+7a+4)
A: 4a+28a^2+16a
B: 4a^3+28a^2+16a
C: 4a^3+44^a
D: 44a^4

question: (2y-3)(3y-2)
A: 6y^2-13y+6
B: 6y^2-13y-6
C: 6y^2+13y-6
D: 6y^2+13y+6

answer: a and c are correct

step-by-step explanation:

the +5 is the vertical translation

the added negative symbol in front is the reflection over the y-axis

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation: