Answer:
Step-by-step explanation:
=> 
=> 
<u><em>Cancelling (x-1)</em></u>
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=>
Answer:
72x3 or 6x9 sorry if wong
Step-by-step explanation:
I had a question just like this I put 12x plus 18y plus 53 plus 1 and it worked
Answer:
yeah thats a function
Step-by-step explanation:
if you were to draw a vertical line through any point on that graph, you could tell that there would be no point above another, which makes this data set a function. basically, there must be no more than one y-value for every x-value in a data set for it to be considered a function.
9514 1404 393
Answer:
5 miles
Step-by-step explanation:
It may get a bit messy, but we can solve for the desired value directly. Let d = the distance walked (in miles). Then 20-d is the distance traveled in the car. The relevant relation is ...
time = distance / speed
The total travel time is 9:00 -6:50 = 2:10 = 2 1/6 hours = 13/6 hours. Here is the equation for total travel time.
total time = time spent walking + time spent riding
13/6 = (d/3) + (20-d)/30
Multiplying by 30 gives ...
65 = 10d + 20 -d
45 = 9d . . . . . . . . . . subtract 20
5 = d . . . . . . . . . . . . divide by 9
The girl walked 5 miles.
_____
<em>Check</em>
Her walking time was (5 mi)/(3 mph) = 5/3 h = 1:40.
Her riding time was (15 mi)/(30 mph) = 1/2 h = 0:30.
Her total travel time was 1:40 +0:30 = 1:70 = 2:10, as required.
