Hattie purchased 12a pounds of apples and 4b pounds of bananas from the grocery store. She then used 2b pounds of bananas and 7a pounds of apples making pies. If a is the cost per apple and b is the cost per banana, which expression represents the total amount Hattie spent?

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.

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?