Answer:
39.60
Step-by-step explanation:
9.90 x 4 = 39.60
Eight less than the product of 2 and a number x is: 2x-8
Answer: Choice C

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Explanation:
There are four marked points on the line.
Each point is of the form (x,y)
- The first or left most point is (0,1)
- The second point is (2,2)
- The third is (4,3)
- The fourth is (6,4)
Each of these points is then listed in the table format as shown above.
There are infinitely many other points on the line; however, we only select a few of them to make the table (or else we'd be here all day).
Extra side notes:
- The slope of this line is m = 1/2 = 0.5
- The y intercept is 1 located at (0,1)
- The equation of this line is y = 0.5x+1
100 seconds. The numbers on the left are seconds.
By order of operation
5+1x10
5+10
15
By normal solving
5+1x10
6x10
60