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lisabon 2012 [21]
3 years ago
5

Wilbur bought eight shirts for a total of $56. T-shirts cost four dollars and long sleeve shirts cost 12. how many of each type

of shirt did he buy?
Mathematics
2 answers:
Zarrin [17]3 years ago
8 0
It’s 56$ t shirts cost 4 dollars long sleeves are 12
NeX [460]3 years ago
7 0

Answer:

3 long sleeve ,5 t shirt

Step-by-step explanation:

4x+12y=56

x+y=8

multiply bottom equation by four

4x+12y=56

4x+4y=32

subtract the two equations

8y+24

divide both sides by eight

y=3

plug into original equation

x+3=8

simplify

x=5  

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Can someone please answer. There is one problem. There's a picture. Thank you!
swat32

what are they asking you for?


8 0
3 years ago
Which is the equation of a parabola with a directrix at y = −3 and a focus at (5, 3)?
kramer

Answer:

y = 1/12 (x − 5)²

Step-by-step explanation:

We can solve this graphically without doing calculations.

The y component of the focus is y = 3.  Since this is above the directrix, we know this is an upward facing parabola, so it must have a positive coefficient.  That narrows the possible answers to A and C.

The x component of the focus is x = 5.  Since this is above the vertex, we know the x component of the vertex is also x = 5.

So the answer is A. y = 1/12 (x−5)².

But let's say this wasn't a multiple choice question and we needed to do calculations.  The equation of a parabola is:

y = 1/(4p) (x − h)² + k

where (h, k) is the vertex and p is the distance from the vertex to the focus.

The vertex is halfway between the focus and the directrix.  So p is half the difference of the y components:

p = (3 − (-3)) / 2

p = 3

k, the y component of the vertex, is the average:

k = (3 + (-3)) / 2

k = 0

And h, the x component of the vertex, is the same as the focus:

h = 5

So:

y = 1/(4×3) (x − 5)² + 0

y = 1/12 (x − 5)²

3 0
3 years ago
Tina kept a record of the amount of rainfall at her house each month. January had 3.331 February had 3.133 March had 3.313 and A
yawa3891 [41]

Answer:

3.331 , 3.313 , 3.133 , 1.333

Step-by-step explanation:

because it just is that way

4 0
3 years ago
Juan is making t-shirts to sell at a concert.
o-na [289]

Answer:

7 shirts

Step-by-step explanation:

The function for producing shirts is

f($) = 50 + 7.5(x), where x is the number of shirt

The function for selling shirts is

f($) = 15(x)

For there to be a profit, he must make more money selling the shirts than he spent on making the shirts

Therefore, 15(x) > 50 + 7.5(x)

15x > 50 + 7.5x

15x - 7.5x > 50

7.5x > 50

x > 6.67 shirts

To make a profit, Juan must sell at least 7 shirts

7 0
2 years ago
Need help with number 2 please
miss Akunina [59]
A the answer is 9.76
B: he paid with 10 dollar bill you have to subtract 10.00-9.76 he received 24 cents back!
7 0
3 years ago
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