7x-1+7x+8+5x+2=180
7x+7x+5x+2-1+8=180
19x+9=180
19x=180-9
19x=171
19x\19=171\19
x=9
therefore,7x-1
7(9)-1
=62
therefore, 7x+8
7(9)+8
=71
therefore 5x+2
5(9) +2
=47
Answer: Number one is C I believe
Step-by-step explanation: 4x - 5 =7
4x -5 + 5=7+5
4x=12
4x-4=12 divided by 4
x= 3
Since there are 60 minutes in an hour and 24 hours in a day, we can figure out that there are 60 x 24 = 1440 minutes in a day. Multiplying 1440 by 65 beats per minute results with 93600 beats per day.
Answer: the incline on the graph
Step-by-step explanation:
