Answer:
x = 10
Step-by-step explanation:
Answer:




Step-by-step explanation:
We have that:

When we substitute n=1, we get:

When we substitute n=2 we get:

When we substitute n=3, we get:

When we substitute n=n+1, we get:

Now

We expand and simplify to obtain:


Answer:
There are 45 2-point questions and 5 4-point questions
Step-by-step explanation:
Answer:
a+b
Step-by-step explanation:
math
+3
The elevator went up 7 floors, making the current integer +7. The elevator then went down 4 floors, so 7 - 4 is 3. The final answer representing the change in floor level is +3 (positive three.)