The number in between 2 and 7 is 4.5.
To find this, find the average of 2 and 7. 2+7 = 9. 9/2 = 4.5.
Hope that helped you.
A line perpendicular to another has a slope that is the negative reciprocal of the slope of the other line. The negative reciprocal of the original line is –2, and is thus the slope of its perpendicular line
Step-by-step explanation:

x varies inversely as y. This means that x is equal to the inverse of y which can be translated as x = 1/y but the problem said that x is <u>n</u><u>o</u><u>t</u><u> </u><u>e</u><u>x</u><u>a</u><u>c</u><u>t</u><u>l</u><u>y</u><u> </u><u>e</u><u>q</u><u>u</u><u>a</u><u>l</u><u> </u>to the inverse of y. Therefore, we need to introduce a factor k. Factor k will represent the word "varies" in the problem.
To illustrate:

Since we don't have the value of k, we have to solve for it by using the first values of x and y which was given as x=2 and y=20.

Now that we have the value of k, we can now solve for the value of x when y=5.

Therefore, when y is 5, the value of x is 8.
Answer:
1/50
Step-by-step explanation:
1 nickel = 5c
1 dollar = 100c
2(5)/5(100) = 2/100 = 1/50
X = 7
1. Combine the terms
2. Subtract 18 from both sides
3. Simplify