What is the sum of the polynomials

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a. 10x^2 - 9

b. 11x^2 - x -9

c. 11x^2 + x - 1

d. 12x^2 - 1

C

Step-by-step explanation:

To add the polynomials you can only add like terms. Like terms are terms that have the same variables and exponents. Only -5 and 4 are like terms. So leave the other terms alone.

The sum is 11x^2 + x - 1.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

c. side angle side. u shares the same sides