Answer:
sum=2a
diff.=-2b
Step-by-step explanation:
a-b+a+b=
2a
a-b-a-b=-2b
Answer:
Step-by-step explanation:
0.2(x+1)+ 0.5x = - 0.3(x-4)
0.2*x + 0.2*1 + 0.5x = -0.3*x + 0.3*4
0.2x + 0.5x + 0.2 = -0.3x + 1.2
0.2x + 0.5x + 0.3x = 1.2 -0.2
1.0x = 1.0
x = 1
15.5 (Just round 15.49 to the nearest tenth)
To find <ABC, the first thing you would need to do is to find angle DBA and the value of x
As <DBE is a right angle, <DBE is on the same straight line as well,meaning that it would be 90° , a right angle as well.
It also mean that the total sum of the angles unknown would be 90°
To find x,we need to set up an equation:
(2x+14)+ (x+7) = 90
3x+21 = 90
3x = 69
x = 23
Thus,<ABC would be
(23)+7
=30°
Hope it helps!
180 - x = r is true.
Thats the only one which is true.