Answer:
-7
Step-by-step explanation:
Domain is simply another way of saying input values. Input values are literally just x values (Any place on the x bar. Range is the same but instead of x values it is for y values.
Answer: the rate at which Jerri runs on level ground is 6 mph
Step-by-step explanation:
Let x represent the rate at which Jerri runs on level ground.
Jerri figures that she runs 2 miles per hour faster downhill than she runs on level ground. This means that the speed at which she runs downhill is (x + 2) mph
Time = distance/ speed
Four miles of the course is downhill. This means that the time it takes her to run downhill is
4/(x + 2)
Whereas the other 3 miles is on level ground. This means that the time it takes her to run on level ground is
3/x
Jerri jogs 1 hour each day over the same 7-mile course. This means that
4/(x + 2) + 3/x = 1
Cross multiplying by x(x + 2), it becomes
4x + 3(x + 2) = x(x + 2)
4x + 3x + 6 = x² + 2x
x² + 2x - 4x - 3x - 6 = 0
x² - 5x - 6 = 0
x² + x - 6x - 6 = 0
x(x + 1) - 6(x + 1) = 0
x - 6 = 0 or x + 1 = 0
x = 6 or x = - 1
Since the speed cannot be negative, then x = 6 mph
Answer:
By definition the area of a rectangle is:
A = l * w
Where,
l: long
w: width
So we have to clear the width:
w = A / l
Substituting the values:
w = (234) / (18) = 13
w = 13 feets
answer
the width, in feet, of the room is 13
Step-by-step explanation:
The total cost the movie rental charges for 5 months is $105.
<h3 /><h3 /><h3 /><h3>The explicit function is represented as follows:</h3>
where
n = number of months
The movie rental charges $20 a month plus another $5 just for membership.
The total cost for 5 months can be computed as follows:
n = 5
Therefore,
f(5) = 20(5) + 5
f(5) = 100 + 5
f(5) = 105
The total cost for 5 months is $105.
learn more explicit function here: brainly.com/question/17851098?referrer=searchResults