Which of the following is a true statement about a rectangle? Question 17 options: A) The diagonals are perpendicular. B) All four angles are congruent. C) The opposite angles are complementary. D) All four sides are congruent.

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.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?