What is the sum of the polynomials? plzz (9x4−13x3−x−7)+(7x3−2x+1) 9x^4−6x^3−x−8 9x^4−6x^3−3x−6 −6x^6+9x^4−3x^2−6 −6x^6+9x^4−x−8

Enter numbers to write 0.000328 0.000328 in scientific notation. 1 1 0.000328=3.28 × 0 . 000328 = 3 . 28 × =3.28×10 = 3 . 28 × 10

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

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