Answer:
39°
Step-by-step explanation:
3x+15+1+10x+60=180
13x+76=180
13x=180-76
13x=104
x=8
A=3x+15
A=3(8)+15
A=24+15
A=39
Two fractions where the LCD between them is 20 can be 7/20 and 20/40.
I chose these 2 fractions because 7/20 cannot be reduced anymore, but 15/40 can be reduced into 10/20.
102.444444444 is the answer
There are six digits to choose from, but you're only taking three at a time, so the number of such numbers is

The first and last digits can only be even if the number takes the one of the forms "2 _ 8" or "8 _ 2". The middle number can be any of the remaining four, so there is a total of eight such numbers.
This means the probability of getting a number beginning and ending with an even digits is

.
The answer is to the question is y=-2x+11