Question 1: $43 dinner, 18% gratuity?

Question 2: $46 shoes, 2.9% tax

PLEASE HELP!!

What are the soultion(s) to the quadratic equation 40- x^2=0

Apolynomial has two terms. check all of the factoring methods that should be considered. common factor difference of cubes sum of cubes difference of squares perfect-square trinomial factoring by grouping

Which of these side lengths could form a triangle a) 2 cm , 2 cm , 4 cm b) 3 cm , 5 cm , 10 cm c) 3 cm , 4 cm , 5 cm d) 4 cm , 8 cm , 15 cm