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-BARSIC- [3]
4 years ago
15

4. Which relation is a function?

Mathematics
2 answers:
Sunny_sXe [5.5K]4 years ago
8 0
B ,because a function is where x values do not repeat therefore why it is B
Lorico [155]4 years ago
4 0

Answer:

It's B.

Step-by-step explanation:

That is B because there are no duplicate x-values in the ordered pairs.

D is a set of numbers, not a function.

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Step-by-step explanation

-2x+7y=16 x=-8,0 y=0,16/7

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Sam wrote these four expressions. Sam believes that some of these expressions are equivalent. Which expressions are the ones tha
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4 years ago
Stephon has a square brick patio. He wants to reduce the width by 4 feet and increase the length by 4 feet.
alekssr [168]

Answer:  The expressions for the length and width of the new patio are

\ell=x+4,~~w=x-4.

And the area of the new patio is 384 sq. feet.

Step-by-step explanation:  Given that Stephen has a square brick patio. He wants to reduce the width by 4 feet and increase the length by 4 feet.

The length of one side of the square patio is represented by x.

We are to write the expressions for the length and width of the new patio and then to find the area of the new patio if the original patio measures 20 feet by 20 feet.

Since Stephen wants to reduce width of the patio by 4 feet, so the width of the new patio will be

w=(x-4)~\textup{feet}.

The length of the patio is increased by 4 feet, so the length of the new patio will be

\ell=(x+4)~\textup{feet}.

Now, if the original patio measures 20 feet by 20 feet, then we must have

w=x-4=20-4=16~\textup{feet}

and

\ell=x+4=20+4=24~\textup{feet}.

Therefore, the area of the new patio is given by

A_n=\ell \times w=24\times16=384~\textup{sq. feet}.

Thus, the expressions for the length and width of the new patio are

\ell=x+4,~~w=x-4.

And the area of the new patio is 384 sq. feet.

4 0
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