Answer:
A
Step-by-step explanation:
The x is the varible connected to the changing number. -2 is getting added to 43 every hour as displayed with -2x+43.
Hello from MrBillDoesMath
Answer: 6.2 feet
Discussion:
The ladder and the wall form a right triangle. The length of the ladder, 20 in this case, is the hypotenuse of the triangle. Let "x" be the distance between the foot of the ladder and the building. Then from trigonometry,
cos (@) = length of adjacent side/ hypotenuse
or in our case
cos(72) = x / 20 => (multiply both sides by 20)
20 * cos(72) = x.
Using a calculator this becomes
20 * ( .3090) = 6.18 feet (approx) or 6.2 feet , rounded to the nearest foot.
Thank you,
Mr. B
Answer:
Step-by-step explanation:
The equation for a line can be written in slope-intercept form:
Where 
is the slope of the line and 
is the y-intercept.
Since we know "
increases by 
when 
increases by 
", that tells us that the slope of the line is .
To figure out the y-intercept, , we can plug in the coordinates given in the problem to the point that the line passes through, 
Therefore, the equation of the line is 
