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vredina [299]
3 years ago
12

A function, f, is defined by the set {(2,3), (4,7),(-1,5)}.

Mathematics
1 answer:
Kitty [74]3 years ago
3 0

Answer:

{(3,2), (7,4),(5,-1)}.

Step-by-step explanation:

To find the points reflected through y=x, you are really being asked to find the inverse relation. That means we are just swapping x and y per point; like (a,b) to (b,a).

So (2,3) when reflected through y=x becomes (3,2).

(4,7) when reflected through y=x becomes (7,4).

(-1,5) when reflected through y=x becomes (5,-1).

So the inverse relation is:

{(3,2), (7,4),(5,-1)}.

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A businessman buys 1,440 dozen pens at $2.50 a dozen and then sells them at a price of 25¢ apiece. What is his total profit on th
LekaFEV [45]
He spend: 1440*2.5=3600 
he earn: 0.25*1440*12=4320
[because he sells 0.25/each and buy 1440 dozen so 1440*12]

4320-3600=720
5 0
3 years ago
If f(x) = 3x + 2 and g(x) = x2 + 1, which expression is equivalent to (fog)(x)?
Vedmedyk [2.9K]

Answer:

3(x² + 1) + 2

Step-by-step explanation:

(f ○ g)(x) = f(g(x))

Substitute x = g(x) into f(x), that is

f(x² + 1) = 3(x² + 1) + 2 ← is the equivalent statement

3 0
3 years ago
How do you solve 26/57= 849/5x
sergeinik [125]
If you would like to solve 26/57 = 849/5x, you can do this using the following steps:

<span>26/57 = 849/5x          /*(5x)
</span>26/57 * (5x) = 849     /*57
26 * 5x = 849 * 57    /26
5x = 48393/26        /5
x = <span>48393/(26*5)
x = 372.25

The correct result would be </span><span>372.25.</span><span>
</span>
8 0
3 years ago
Can anyone please help me with number 17?
sweet-ann [11.9K]

The answer is G. I know because, 1.75 * 3 (slices of pizza) = 5.25.

13.75 - 5.25 = 8.5

8.5 / 4 (hot dogs) = 2.1 (price per hot dog)

We can apply this to Sarah by saying

2 * 1.75 = 3.5

3 * 2.1 = 6.3

Added equals 9.8 or 9.75 (Sarah's total)

Correct me if I am wrong hope this helps:)

7 0
3 years ago
Find the determinant of this matrix:
Margarita [4]

Answer:

-1

Step-by-step explanation:

Formula to the determinant is:

\left[\begin{array}{ccc}a&b\\c&d\end{array}\right] = ad-bc

0(0)–1(1)

0-1

-1

6 0
2 years ago
Read 2 more answers
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