Answer:
6/9 = 21/x
to 2/3 = 21/x (6/9 equals two thirds)
to 2/3*21 = x (by multiplying both sides by 21)
so x= 14 or 1.50 apple
The equation can be used to find the time in hours, and the time will be 2.5 hours. So the correct answer is option A.
<h3>What is an equation?</h3>
It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
Layna can paint a 350-square-foot room in 4 hours.It takes Bebe 7 hours to paint the same room.
Let t be the total time taken by both to paint.They are completing 1 job so the equation will be :
Further solving it we get;
7 t + 4 t = 28
11t = 28
t = 2.5 hours.
Therefore the equation can be used to find the time in hours, and the time will be 2.5 hours. So the correct answer is option A.
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The center is point C
The line segment that has a radius is CT
A chord is QT
Diameter is RT
She has to do at least 8.6 hours walking (and then 7.5 hours dog walking) for the minimum of $80 earning
Keilantra is working two summer jobs, making $12 per hour lifeguarding and $6 per hour walking dogs. Last week Keilantra worked a total of 11 hours and earned a total of $108.
x = number hours dog walking
y = number hours Lifeguarding
x + y <= 11
12x + 6y >= 80
The solution is the common area below the first line and above the second line.
The first line is above the second line (due to the y-intercept of 11 vs. 8) until the crossing point.
for the crossing point we use the regular equations :
from the first we get
x = 11 - y
using this in the second
12×(11 - y) + 6y = 80
132 - 12y + 6y = 80
6y = 52
y = 52/6 = 26/3 = 8.6
x = 11 - y = 11 - 8.6 = 2.4
So, she has to do at least 8.6 hours lifeguarding (and then 7.5 hours dog walking) for the minimum of $80 earning, all the way up to the maximum of 11 hours lifeguarding (and 0 dog walking).
Hence the answer is she has to do at least 8.6 hours lifeguarding (and then 7.5 hours dog walking) for the minimum of $80 earning.
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