X+5+2x-2+90=180. combine like terms and solve like a normal algebra problem to find x. if you need to find the answer for a certain angle, plug in the value you got for x into one of the angle equations
Answer:
35%
Step-by-step explanation:
9+11=20
3+4=7
20*5=100
7*5=35
Add the two speeds together, then divide the two, this gives the average speed. Hope this was helpful!
Answer:
3: 
4: 
Step-by-step explanation:
Question 3 can be re-written as:

which equals:

Question 4 can be re-written as:

Doing the first 2 brackets gives us:

Expanding these two:

Simplifying it:
