Answer:
B. 9.9 ft
Step-by-step explanation:
You have a right triangle, so you can use the Pythagorean theorem.
a^2 + b^2 = c^2
15^ + x^2 = 18^2
225 + x^2 = 324
x^2 = 99
x = sqrt(99)
x = 9.9
Answer: B. 9.9 ft
We need to put these equations into y=mx+b format.
5x-3y=-6
-3y=-5x-6. (take 5x from both sides)
y=5/3 x +2 ( divide both sides by -3)
The slope is 5/3
3x+5y=-20
5y= -3x -20 (subtract 3x from both sides)
y=-3/5x -4 (divide both sides by 5)
The slope is -3/5
The slopes of perpendicular lines are the opposite (+/-) reciprocal. We have 5/3 and -3/5. This shows they are perpendicular.
45 + 35x = 40x
45 = 40x - 35x
45 = 5x
45/5 = x
9 = x <=== they are the same cost at 9 nights
Given:
The inequality is:
To find:
The values for x.
Solution:
We have,
Using distributive property, we get
On further simplification, we get
Divide both sides by 7.
Therefore, the required solution is .
Note: All options are incorrect.
