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arsen [322]
3 years ago
15

Which of these mappings is a function?

Mathematics
1 answer:
strojnjashka [21]3 years ago
6 0

Answer:

B

Step-by-step explanation:

My power of guesssing :)

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Serial numbers for a product are to be made using 3 letters followed by 4 digits. The letters are to be taken from the first let
Tpy6a [65]

Answer:

30,240 ways,  if I am restricted to using A, B, and C for letters

Step-by-step explanation:

This uses Combinatorics from Discrete Math.

so.

3 letters  and 4 digits.

26 letters from alphabet, but you want to choose first letters.  no repeats...

Does this mean only letters A, B, and C ?

digits from 10 digits...

I imagine  7 empty slots , and the number of ways they occur together is by the product of the number of choices each box has.

3*2*1  *  10*9*8*7 = 6  * 5040  = 30,240 ways

3 0
3 years ago
Wayne is going to send some flowers to his wife. Belmont Florist charges $1 per rose, plus $35 for the vase. Darrell's Flowers,
taurus [48]
I think it would be a yes
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3 years ago
bryce is painting the seats in football stadium. if there are 49 s rows of seats and there are 32 seats in each row, how many se
LenKa [72]
49 times 32= 1,568 so 1,568 is your answer, hope I helped :)
7 0
3 years ago
Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 5p+5x+3px=71. Suppose al
vova2212 [387]

Answer:

decrease of 1.153 sales per day

Step-by-step explanation:

Given:-

- The price of item = p

- The number of sales = x

- The relationship between "p" and "x" is given below:

                             5p+5x+3px=71

Find:-

Find the rate at which x is changing when x=3, p=4, and dp/dt=1.4. The rate at which x is changing is [ ] sales per day

Solution:-

- Take the time derivative (d/dt) of the entire given expression and apply chain rule on d/dt ( 3px ). Since both "p" and "x" are only functions of time "t":

                               d/dt (5p+5x+3px=71)

                               5*dp/dt + 5*dx/dt + 3* ( x*dp/dt + p*dx/dt) = 0

- Use the given values x=3, p=4, and dp/dt=1.4 to determine dx/dt:

                               5*1.4 + 5*dx/dt + 3*3*1.4 + 3*4*dx/dt = 0

                               17dx/dt = -19.6

                               dx/dt = -1.153 sales per day

- There is a decrease of 1.153 sales per day.

6 0
3 years ago
Is (6, –2) a solution to this system of equations? y = –1/6 x − 1 y = 1/6 x − 3
Liula [17]

Answer:

Yes, (6, -2) is a solution to the given system of equations.

Step-by-step explanation:

Please write  y = –1/6 x − 1 y = 1/6 x − 3 as follows, for greater clarity:

y = (–1/6)x − 1

y = (1/6)x − 3

Let's actually solve this system:

y = (–1/6)x − 1

y = (1/6)x − 3

-----------------------

2y = -4, or y = -2

Now find x.  Arbitrarily we choose to use the first equation for this purpose:

y = (-1/6)x - 1.  We set y = -2 and find x:    -2 = (-1/6)x - 1

Combining the constants, we get -1 = (-1/6)x, or 6 = x

Yes, (6, -2) is a solution to the given system of equations.

5 0
3 years ago
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