For 3. the triangle with 4,4,5 is similar to the one with 8,10 because you can scale it down by 2 or because it is similar in shape
4. X=-3
Answer:
4,589,200
Step-by-step explanation:
X*5
x*<span>1
</span>5*x evaluates to 5x
Multiply 9 and 5x
Multiply 1 and x answer is 15x
Answer: 60 ways.
Explanation: Suppose that we had 5 people, A, B, C, D, and E, and we had to select a P, VP, and S.
For the President, we have 5 different selections.
If we choose a president, then we can only pick 1 from 4 people for the VP.
Using the same logic, we'd have 3 different choices for the S.
Hence, we have 5 · 4 · 3 different ways.
Alternatively, this is:

different ways.