Let x = the unknown number
five more than a number = twice the number
x + 5 = 2x
5 = 2x - x
5 = x
( Balance method is used to solve )
substitution
x + 5 = 2x
5 + 5 = 2 x 5
10 = 10
answer : the unknown number is 5
Answer:
In order top to bottom: perpendicular, parallel, neither
Step-by-step explanation:
For lines to be perpendicular, their slopes must be the opposite reciprocals of each other. That means the fraction is flipped and the sign is flipped. For the first one it's 3/4 and -4/3 which is opposite reciprocals.
For lines to be parallel, the slopes are the same. The second one has both slopes = 1/2.
The last one is neither because it's not equal and they're not opposite reciprocals.
I recommend graphing these if you're still having trouble with the concept. You can try desmos.com, that's a good website to use.
45 minutes x 22= 990, 990 divided by 60 is 16.5 hours or 16 and 1/2 hours
The answer is 128. Sorry I’m really bad at explaining
Answer: See below
Explanation:
8x + 14 = 10x - 10 (alt. exterior angle)
8x - 10x = -10 - 14
-2x = -24
x = -24/-2
x = 12
Now plug x = 12 in 10x - 10 to find the angle:
10(12) - 10 = 120 - 10 = 110 degree
