Solve this Answer PLZ

C. 3r + 7/ 7

Step-by-step explanation:

First, we need to factor, the top value.

3r² + 10r + 7/ 7r + 7

3r² + 10r + 7

= (r + 1) (3r + 7)

= (r + 1) (3r + 7)/ 7r + 7

7r + 7 = 7( r + 1)

(r + 1) (3r + 7) / 7( r + 1)

The ( r + 1) cancel out with each other and we're left with

3r + 7/ 7

C. 3r + 7/ 7

Step-by-step explanation:

Because it is the "Correct Answer"

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

1 is c

2 is a

3 is a

step-by-step explanation: