Afamily is traveling in a car at a constant average speed during a road trip. the function d(t)=70t+620 models the distance d, in miles, the family is from their house t hours after starting to drive on the second day of the road trip.
a) at what average speed is the family's car traveling?
-explain
b) what is the distance between the family's house and the point where they started driving on the second day
-explain

A.  70 miles per hour B.  620 miles from home

Step-by-step explanation:

This function is a linear equation, following the slope-intercept form of a line.  This standard form is y = mx + b, where m is the slope and b is the y-intercept.  The slope of a line is the rate at which the steepness of the line is changing.  The y-intercept is where the function is "starting".

In our case, the number in the rate of change position is 70.  It is being multiplied by t.  If t = 1, that means that after 1 hour, we have gone 70 miles.  If t = 2, that means after 2 hours we have gone 140 miles.  If t = 3, that means that after 3 hours, we have gone 210 miles; etc.  That number in the slope position represents the rate at which you are traveling PER HOUR; the slope.

The "starting" position of day 2 is found in the y-intercept.  Replacing x with 0, meaning NO time has gone by at all, at the beginning of the second day, we are starting 620 miles from home.

x is greater than 5

step-by-step explanation:

2x+7 is greater than 17

    -7                           -7

2x is greater than 10

divide by 2 each side

x is greater than 5

6. 104

7. 52/37

8. 2704

9. 140608

10. -52

11. |52|=52

12. 1/52

13. 156

14. 26

15. 40

16. 37

17. -364

18. 53 1/3

19. 50.96

20. 43 2/3

21. 78

22. 50.75

23. 47.63

24. 163.28

25. 10400

26. 338

27. 208

28. 2704 square inches

29. 312 square meters

30. don't know what its asking, tell me so i can tell you

31. 8490.56

32. 52 degrees would be an acute angle

33. 128 degrees

34. 20.8

35. 39

36. 208