Which of the following is not a function? a(3,1), (-3, 2), (4, 5), (-4, 5), (0, 0)
b(1, 2), (3, 4), (1, 5), (5, 7), (2, 4)
c(-4, 1), (-2, 3), (-1, 5), (0, 6), (-3, 5)
d(1, 3), (2, 3), (4, 5), (6, 4), (8, 9)
please help I'm timed.

Match each expression with its simplified form.

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.

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem