The mean is 12.5
5+10+10+15+15+20= 75
75/6 = 12.5
For the square its 18x12 which is 216
For tge triangle its 18x7 which is 126 divided by 2 because its a triangle so 63
216+63=279yds^2
6 pencils = 2 rulers
1ruler= 2 eraser
12 pencil = 4 rulers
4rulers=8 eraser
so 8 erasers are equal to 12 pencils
Answer:
1. 11
2. D: 90
Step-by-step explanation:
Hope I helped and can I have brainliest please? :)
Steps:
1. if you put this in a calculator this is how you would get the answer:
(2*3)^(2) -5^(2) and you get 11.
2. same with this one: 3^(4)+9
so 3x3x3x3+9=90