Erin has written three tests for her math class. She calculates the average of hermarks on the first two tests. This average is then averaged with her third testmark to get 80%. She then calculates the average of her marks on the last twotests. This average is then averaged with her first test mark to get 83.5%.Finally, she calculates the average of her marks on the first and third tests. Thisaverage is then averaged with her second test mark to get 84.5%.Her fourth test is coming up and after writing this test she wants her overallaverage for the four tests to be exactly 86%. If all four tests are out of 100 marks, what mark does Erin need to get on her fourth test in order for her overallaverage to be exactly 86%?

2/4 is the answer

step-by-step explanation:

x= total pieces

both ate 9 pieces

mindy ate 3 so troy ate 6

6= (1/4)x

x =24

there were only 2 presidents that were under the age of 45. theodore roosevelt, and jfk, that makes 5%

2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6

answer: 0.11 cents for each egg

find what is a dozen     dozen = 12

you have to divide 1.35 / 12 = 0.1125