Answer:
5.8 miles
Step-by-step explanation:
Remark
The total distance = 162.4
The total time = 28 days
Formula
Daily distance = Total distance / Total time
Solution
Daily distance = 162.4/28
Daily distance = 5.8 miles
A computer discounted at 30% off is less expensive.
First: 1000*.8 = 800
800*.9 = $720
Second: 1000*.7 = $700
Step-by-step explanation:
Use the function to find the coordinates of the endpoints. Find the slope between those points, then use point-slope form to write the equation. If you wish, you can simplify to slope-intercept form.
For example, #66:
f(2) = -4(2) + 1 = -7
f(5) = -4(5) + 1 = -19
So the endpoints of the secant line are (2, -7) and (5, -19). The slope between those lines is:
m = (-19 − (-7)) / (5 − 2)
m = -12 / 3
m = -4
The equation of the line in point-slope form is:
y − (-7) = -4 (x − 2)
y + 7 = -4 (x − 2)
Simplifying:
y + 7 = -4x + 8
y = -4x + 1
f(x) is a line, so unsurprisingly, the secant line connecting two points on that line has the same equation.
Let's try #68:
g(2) = (-1)² + 1 = 2
g(5) = (2)² + 1 = 5
So the endpoints of the secant line are (-1, 2) and (2, 5). The slope between those lines is:
m = (5 − 2) / (2 − (-1))
m = 3 / 3
m = 1
The equation of the line in point-slope form is:
y − 2 = 1 (x − (-1))
y − 2 = x + 1
Simplifying:
y = x + 3
8 Lines = 21.92
So to figure out 1 lane you just divide 21.92 with 8
1 Line = 2.74
9 Lines = 21.96
Divide 21.96 by 9
1 line = 2.44
Now the question asks how much wider is each lane so now just subtract 2.74-2.44
2.74-2.44 = 0.30
0.30 is the answer
C 9 because 18divid by 2 is 9 and 27 divided by 3 is 9