I'll help you out with 3 questions.
For #1, you kind of figured it out yourself
That 90 degree angle on paper means that m/1 and m/2 make up 90
If m1 is 50, then just subtract m1 (50) from 90, making it 40. m/2 is 40
If Angle M4 is 45 degrees then angle M3 is 180-45 since they both make up a 180 degree angle.
There are 180 degrees in a triangle
If m 8 = 78
and m 9 = 60
m 10 is 180 - 78 - 60
Answer:
The answer equals -8
Step-by-step explanation:
Order of Operations: BPEMDAS
FOIL - First, Outside, Inside, Last
Step 1: Write out expression

Step 2: Expand

Step 3: FOIL first 2

Step 4: Replace square roots with -2
-2(-2)(-2) = (-2)³ = 8
Answer:
7.8
Step-by-step explanation:
If all the scores of n students are the same, say x, then the average is
x*n/n, which is of course x.
Answer:
12.29
Step-by-step explanation:
1,220,000/15,000,000 is 12.29.