Answer:A system of linear equations usually has a single solution, but sometimes it can have no solution, or infinite solutions.One solution. A system of linear equations has one solution when the graphs intersect at a point.
Step-by-step explanation:
Answer:
75 minutes or 1 hr and 15 minutes
Step-by-step explanation:
for history, he studied 2 hrs and 40 minutes....thats a total of 160 minutes
this is 10 minutes more then twice the time he spent on his last exam.
let x represent the time spent on last exam
160 = 2x + 10
160 - 10 = 2x
150 = 2x
150/2 = x
75 = x.......so he spent 75 minutes (or 1 hr and 15 minutes) on his last exam
Answer:
40
Step-by-step explanation:
52= 1/2(64 + x)
52 = 32 + 0.5x
52-32= 32-32 + .5x
20=.5x
Divide both sides by .5x
X = 40.
To find the equation of the line, we are going to use the point-slope form, which is listed below:
is a point on the line
is the slope of the line
You may notice that we have a point, but no slope is given to us. However, the problem states that the line is parallel to the equation 
, which means that it has the same slope as this line, which is 3. (Remember that this line is set up in 
form, where is the slope)
Thus, we can now insert our values into the point-slope formula to find the equation of our line.
The problem made it clear that it didn't want the form , so let's put it in standard form:
The equation of our line is 
.
Answer:
Now that his car is 5 years old, he would like to know whether the variability of gas mileage has changed. He recorded the gas mileage from his last eight fill-ups; these are listed here. Conduct a test at a 10% significance level to infer whether the variability has changed.
Step-by-step explanation:
