Answer:
The selling price of one striped lanyard
Answer:
Associative Property
Step-by-step explanation:
To associate means to connect or join with something. According to the associative property of addition, the sum of three or more numbers remains the same regardless of how the numbers are put together.
Answer:
B. 16 hrs
Step-by-step explanation:
Distance = rate × time
The best way to do this is to make a table with the info. We are concerned with the trip There and the Return trip. Set it up accordingly:
d = r × t
There
Return
The train made a trip from A to B and then back to A again, so the distances are both the same. We don't know what the distance is, but it doesn't matter. Just go with it for now. It'll be important later.
d = r × t
There d
Return d
We are also told the rates. There is 70 km/hr and return is 80 km/hr
d = r × t
There d = 70
Return d = 80
All that's left is the time column now. We don't know how long it took to get there or back, but if it took 2 hours longer to get There than on the Return, the Return trip took t and the There trip took t + 2:
d = r × t
There d = 70 × t+2
Return d = 80 × t
The distances, remember, are the same for both trips, so that means that by the transitive property of equality, their equations can be set equal to each other:
70(t + 2) = 80t
70t + 140 = 80t
140 = 10t
14 = t
That t represents the Return trip's time. Add 2 hours to it since the There trip's time is t+2. So 14 + 2 = 16.
B. 16 hours
The final score in the video game is 67.
Step-by-step explanation:
Points earned = 50 points, 87 points
Points lost = 40 points, 30 points
Let,
Plus sign (+) represent the points earned.
Negative sign (-) represent the points lost.
Therefore,
Points earned = +50, +70
Points lost = -40, -30
Adding all the points to get final score;
Final score = 50+(-40)+87+(-30)
The final score in the video game is 67.
Keywords: integers, subtraction
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