10x3 + 3x2 – 20x – 6 (10x3 + 3x2) + (–20x – 6) x2(10x + 3) + + 3) teresa is factoring this polynomial by grouping. which number goes in the blank to complete the step?

Given expression : .

We need to factor it by grouping.

Teresa did first grouping it :

We get

We got another factor in shown factors (10x + 3) .

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,