What are the roots of y = x2 – 3x – 10?
–3 and –10
–2 and 5
2 and –5
3 and 10

B. -2 and 5

Step-by-step explanation:

We are given the quadratic equation

The roots are given when we equate the polynomial to 0 i.e.

The roots of a quadratic equation is given by .

On comparing the equations, we have,

a= 1, b= -3 and c= -10

Substituting the values in the formula gives us,

So, option B is correct.

step-by-step explanation:

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3