He has $10 left.
If he takes away $5 from the $30 to give to the animal charity he is left with $25. He then buys 3 books for $5 each, so you will multiply 3x5 giving you 15. So then you subtract $15 from $25 leaving you with $10
Two triangles are similar if they have:
<span>all their angles equalcorresponding sides are in the same ratio</span>
But we don't need to know all three sides and all three angles ...two or three out of the six is usually enough.
There are three ways to find if two triangles are similar: AA, SAS and SSS:
Answer:
Step-by-step explanation:
Let her brother's age be x
Sarah age = 2x + 4
Step 1: Add 3x to both sides to get 4 = 3x - 1
Step 2: Add 1 to both sides to get 5 = 3x
Step 3: Divide by 3 on both sides to get 5/3 = x