Two times a number plus four is 22. What is the number? 2 6 9 11
2 answers:
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Answer:
Step-by-step explanation:
<u><em>The complete question is</em></u>
The table shows how far a distance runner has traveled since the race began. What is her average speed, in miles per hour, during the interval 0.75 to 1.00 hours?
Time Elapsed (Hours) Miles Traveled (Miles)
0.50 2.00
0.75 3.50
1.00 4.75
Let
x ----> the time in hours
f(x) ----> the distance traveled in miles
so
we have
x (Hours) 0.50 0.75 1.00
f(x) (Miles) 2.00 3.50 4.75
we know that
To find the average speed, we divide the change in the output value by the change in the input value
the average speed is equal to
In this problem we have
Substitute
keeping in mind that parallel lines have the same exact slope, hmmm what's the slope of 4x - 2y = 3 anyway? well, let's put it in slope-intercept form firstly.
a)
so we're looking for a line whose slope is 2 and passes through 2,1.
b)