Answer:
Joan's older sister weighs 90 pounds
Step-by-step explanation:
x = older sister
x - 10 = Joan
(x + (x-10))/2 = 85
2x - 10 = 170
2x = 180
x = 90
The pattern is that you are dividing by 3.
Therefore, to work out the next three numbers, you need to divide the last number by 3.
So you'd do:
1/9 ÷ 3 = 1/27
1/27 ÷ 3 = 1/81
1/81 ÷ 3 = 1/243
Therefore, the next three numbers are 1/27, 1/81, and 1/243.
Yes, because both triangles are divisible by a certain number to equal to each side of each triangle.
-12(-3)=36
36+7 =43
hope it helps
