Which of the following is a factor of 9x2 + 21x + 10?

3x + 5
9x + 2
9x + 5
none of the above

 The correct option is (A) 3x + 5.

Step-by-step explanation:  We are given to select the correct factor of the following quadratic expression :

To factorize the given expression, we must find two numbers whose sum is 21 and product is 90.

The factorization of the given expression is as follows :

Therefore, the required factors of the given expression are (3x + 2) and (3x + 5).

Thus, the factor (3x + 5) is the correct one.

Hence, option (A) is CORRECT.

a) false; the points do not have to be in a straight line.

step-by-step explanation:

the points could be in the shape of a triangle

b is incorrect

c is incorrect because it is saying the immediately don't form one when they are capable of doing so

d is incorrect