Using the substitution method, Nelly is solving the following system of equations algebraically. 2x + y = 11
x-3y = -5

What equivalent equation could Nelly use?
1) Зу - 5 - Зу = -5
2) -3y - 5 - 3y = -5
3) 2(3y - 5) + y = 11
4) 2(-3y – 5) + y = 11

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.

Steve had 48 chocolates but he decided to give 8 chocolats to each of his f coworkers. how many chocolates does steve have left

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.