Does this set of ordered pairs represent a function? Why or why not? {(–1, 5), (0, –3), (2, 7), (4, 0), (7, 5)} A. No, because t
iVinArrow [24]
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Answer:
C. Yes, because every x-value corresponds to exactly one y-value.
Step-by-step explanation:
The list of x-values is {-1, 0, 2, 4, 7}. We note that no two are the same, so this is a functional relation.
The set of ordered pairs is a function because each x-value corresponds to exactly one y-value.
You don’t know how many adults were there and how many students were there.
But,
$8(adults) + $5(students) = $19060
And,
Adults + Students = 2570
Let A = adults and S = students
8A + 5S = 19060
A + S = 2570
This is called a system of equations. To solve, you need to rearrange both equations to solve for one of the variables, you can pick any. This makes them cancel out so you can focus on 1 variable. After solving, you can plug the solved variable back into any of the given equations and solve for the second one.
S = 19060/5 - 8A/5
S = 3812 - (8A/5)
This is the first equation rearranged to solve for S
Second:
A + S = 2570
S = 2570 - A
Now, equal each other
3812 - (8A/5) = 2570 - A
Solve for A
3812 + A = 2570 + 8A/5
19060 + 5A = 12850 + 8A
19060 - 12850 = 3A
6210 = 3A
2070 = A
There were 2070 adults
Now, plug A back into any of the 2 equations and solve for S
A + S = 2570
2070 + S = 2570
S = 2570 - 2070
S = 500
2070 adult tickets were sold
500 student tickets were sold
You'll need to graph y = (5/3)x + 3 and y = (1/3)x - 3 on the same set of axes. These two lines will intersect. From the graph, determine the coordinates of the point of intersection. The result is the desired solution (x, y).
First of all, are you able to graph these two lines? Secondly, can you read the coordinates of the point of intersection from the graph?
I urge you to try graphing these lines and determining the point of intersection.
Of course there are other ways in which you could solve this problem (if you were to ignore the requirement that you solve it graphically): elimination by substitution, elimination by addition or subtraction.
Answer:
-40
Step-by-step explanation:
Use PEMDAS
3 – 7 • 5 + 2 • 4
Multiply first:
3-35+8
3-43
-40
Hope this helps! Please mark brainliest :)
Answer: 2) +
Step-by-step explanation:
2) would be the correct answer because when a term is made up of a constant multiplied by a variable or variables, that constant is called a coefficient, so Algebraic terms are separated by a plus sign or +.
Hopefully this helps:)