Answer:
4 hours
Step-by-step explanation:
Since we know he travels at a rate of 1:7.5 all we have to do is divide 7.5 by 30. Do you use proportions? You can set this up as a proportion and the find answer easily.
1
Now we cross product.
7.5 multipled by x =7.5x
1x30=30
so now we have
7.5x=30
Now we have to divide 7.5 on both sides which gives us
x=4
A)

is false. There is no solution.
B)

is false. There is no solution.
C)

is
true. It has infinite solutions.
D)

is
true. It has infinite solutions.
E)

is false. There is no solution.
Answer:

Step-by-step explanation:
Consinder points (0, 5) and (1, 1):

• From general equation of a line:

- m is the slope
- c is the y-intercept
• Considering point (1, 1)

• Therefore;
