Answer:
+ 25
Step-by-step explanation:
To complete the square
add ( half the coefficient of the x- term )²
the coefficient of the x- term is 5 and 5² = 25, hence
x² + 10x + 25 = (x + 5)² ← perfect square
Answer:
Step-by-step explanation:
For the first one, in any triangle, we have the sum of two sides is greater than the third side. Hence, we have 3 inequalities: 
, which give us 
. We conclude that 
.
For the second question, we have 
, and similarly we can show that 
. Hence, 
.
The third question is not very clear.
The sum of the interior angles of a triangle is 180 so to find x your equation would be (x+15)+(2x-20)+(2x)=180...once you solve this equation x should be 37...and now you just plug in 37 for x and solve for the angle measurments....(37+15)=52....(2(37)-20)=54....2(37)=74
Answer:
3,702,856
Step-by-step explanation:
add the three million and then look at the second number you need to add to it and it is seven hundred and two thousand so it should be 702 instead of 720.
Answer:
c= 66
Step-by-step explanation:
2c/15(15)=8.8(15)
2\2c=132/2
c= 66
