PLEASE HELP What is the equation of this line in standard form?
O 82 - 9y=-23
9x - 8y = 23
O 80 - 9y=23
O 82 – 7y= -25

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 a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters