A hobby store prices model train track using a proportional relationship between the length of track (in inches) and the cost in dollars. If 6.4
6
.
4
inches of track costs $16
$
16
, what is the constant of proportionality?

Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 – 4x + 8x^2) + (–6 + 2x – 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x – 5 – 7x^2) – (–2 + 6x^2 – 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by –1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.

Are the corresponding angles congruent? explain why or why not.

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy. how much will she pay after the discount