Now consider a subset of the polynomials, the quadratics (polynomials with a degree of 2). Which operations would the set of quadratics be closed under? For each operation explain why it is closed or provide a counterexample showing why it is not closed. (Hint: Use quadratic expressions to test each operation, such as x2-1 or 3x2+x.)

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11-1 > 1-1+a

-12 > a