Write the sum of
5x2+2x−10 and 2x2+6 as a polynomial in standard form.

7x² + 2x - 4

General Formulas and Concepts:

Algebra I

Step-by-step explanation:

Step 1: Define

(5x² + 2x - 10) + (2x² + 6)

Step 2: Simplify

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.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6