Well if I did the right calculations... Kim is 24. The sister is age twelve! Hope I helped.
A. K+S=36
B. Well Simple Addition and Subtraction solves this easily. If you Add 12+12 it equals 24. It still needs to be larger so that Kim is twice as old as her little sister. So you Add another 12 which gives you 36. Or you can easily subtract 12 from it and that will also bring you to 24.
-.1666667
You can use khan academy or Socratic if you still not sure.
The cost of zero bags of candy .
You are not going to pay for no bags of candy lol!!
Answer:
0.2
Step-by-step explanation:
Convert the walking to percent

Add both skateboarding and walking

Now, subtract that from a whole percent

Convert it to a decimal

Therefore, in decimal, 0.2 is the number that shows the portion of the distance Sandy skips.
Answer:
(d).
Step-by-step explanation:
sin² β + cos² β = 1
cos (α + β) = cos α cos β - sin α sin β
cos α = √(1 -
) = 21 / 29
cos β = 12 / 13
sin β = √(1 -
) = 5 / 13
sin α = 20 / 29
cos (α + β) =
×
-
×
=