A banana hoola hooping, ok now can you help me with #2 and 3 with the picture of the pyramid lol

Solve for x and y a x= 13.3 y= 16.7 b x= 23.3 y= 12.5 c x= 7.5 y= 16.7 d x=7.5 y= 12.5

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)