Answer:
1. Since the angles on the both sides are the same
5x = 100
x = 20
The mistake is that it is absolutely unnecessary to use 180.
2. It is a right angle, which means it would be 90 degrees instead of 180.
3x + 39 = 90
3x + 39 - 39 = 90 - 39
3x = 51
3x = 17
3. The process is wrong
It should be
6x + 2x + 8 = 180
8x + 8 = 180
8x = 172
x = 21.5
1=6
17=102
Explanation:
If she drinks 30 gallons in 5 seconds then you would divide 30 by 5 and would get 6 meaning she drinks 6 gallons per second so if you multiply 6 times 17 you get 102
The answer is 90 degrees. Angle x and angle y form vertical angles, therefore x = y. Angle y forms a straight line with the 40° angle and the 50° angle which means that 50° + 40° + y = 180°. 90° + y = 180°. y = 180° - 90°. y = 90°. As mentioned earlier: x = y, so x = y = 90°.
X^2-13x+30
x^2-10x-3x+30
x(x-10)-3(x-10)
(x-3)(x-10)
so two zeors are 3 and 10 !!