E=6c^2−2c−1

F=−4c^2+7c+5

E+F=

The answer of given equation is + 5c +4

Step-by-step explanation:

By putting the given values of E and F we get,

E + F

=( ) + (-)

Here we will take the coefficient of same variable together

=() +( -2c +7c) +( -1+5)

= + 5c +4

Hope this helps you.

4

step-by-step explanation:

10 cm

step-by-step explanation:

if the polygon is a rectangle, then the perimeter is x+x+y+y. using the values that you gave, the perimeter is 3+3+2+2=10cm.