The question can be answered using ratio and proportion.
In 40 minutes, Tracy can rake 4 bags of leaves. In 2 hours (which is equivalent to 120 minutes), how many bag will it be?
Making the equation.
4 : 40 = BAGS : 120
4 x 120 = 40 x BAGS
480 = 40 (BAGS) // Divide both sides by 40
BAGS = 12.
So there will be 12 bags of leaves.
1) 543/1000
2) 54.3
You're welcome ;)
"5 times a sum of 12 and a number is 80" translates to the next equasion:
5 x (12+a) = 80
Now we just have to solve it to find the value of a.

The unknown number is 4.
D is the right answer.
Answer:
yawwwwwwnnn......,....done
Answer:
Choice A.
Step-by-step explanation:
Apply the vertical line test.
If a vertical line intersects 2 or more points on the graph, the relation is not a function.
If all vertical lines intersect at most 1 point on the graph, the relation is a function.
Any vertical line in Choice A. intersects 1 single point. Choice A. is a function.
There are vertical lines that would intersect 2 points of the graph in Choices B., C., and D., so they are not functions.