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klemol [59]
3 years ago
13

the function below shows the revenue for the t-shirts. for every $1 decrease in price, 5 more t-shirts can be sold​

Mathematics
1 answer:
quester [9]3 years ago
7 0

I am not sure what your question is asking, but if you are looking for the ratio of the amount decreased to the number of t-shirts sold it's 1:5.

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The equation of a linear function in point-slope form is y-y1=m(x-x1). Harold correctly wrote the equation y=3(x-7) using a poin
grin007 [14]

Answer:

(7, 0).

Step-by-step explanation:

We have   y =  3(x - 7)

y = 3x - 21

Point-slope form is

y - y1 = 3(x - x1)

y  -  y1 = 3x - 3x1

Comparing this to the equation y = 4x - 21 we see that y1 = 0 and x1 = 7.

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Yanka [14]

Answer:

m=5/3

Step-by-step explanation:

6 0
2 years ago
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G)<br>(Sin 5A - Sin 7A - Sin 4A + Sin 8A)÷<br>(Cos 4A - Cos 5A - Cos 8A + Cos 7A)=<br>Cot 6A​
RoseWind [281]

We use a similar strategy as in your previous question. Rewrite:

sin(5<em>x</em>) = sin(6<em>x</em> - <em>x</em>) = sin(6<em>x</em>) cos(<em>x</em>) - cos(6<em>x</em>) sin(<em>x</em>)

sin(7<em>x</em>) = sin(6<em>x</em> + <em>x</em>) = sin(6<em>x</em>) cos(<em>x</em>) + cos(6<em>x</em>) sin(<em>x</em>)

→ sin(5<em>x</em>) - sin(7<em>x</em>) = -2 cos(6<em>x</em>) sin(<em>x</em>)

sin(4<em>x</em>) = sin(6<em>x</em> - 2<em>x</em>) = sin(6<em>x</em>) cos(2<em>x</em>) - cos(6<em>x</em>) sin(2<em>x</em>)

sin(8<em>x</em>) = sin(6<em>x</em> + 2<em>x</em>) = sin(6<em>x</em>) cos(2<em>x</em>) + cos(6<em>x</em>) sin(2<em>x</em>)

→   sin(8<em>x</em>) - sin(4<em>x</em>) = 2 cos(6<em>x</em>) sin(2<em>x</em>)

cos(5<em>x</em>) = cos(6<em>x</em> - <em>x</em>) = cos(6<em>x</em>) cos(<em>x</em>) + sin(6<em>x</em>) sin(<em>x</em>)

cos(7<em>x</em>) = cos(6<em>x</em> + <em>x</em>) = cos(6<em>x</em>) cos(<em>x</em>) - sin(6<em>x</em>) sin(<em>x</em>)

→   cos(7<em>x</em>) - cos(5<em>x</em>) = -2 sin(6<em>x</em>) sin(<em>x</em>)

cos(4<em>x</em>) = cos(6<em>x</em> - 2<em>x</em>) = cos(6<em>x</em>) cos(2<em>x</em>) + sin(6<em>x</em>) sin(2<em>x</em>)

cos(8<em>x</em>) = cos(6<em>x</em> + 2<em>x</em>) = cos(6<em>x</em>) cos(2<em>x</em>) - sin(6<em>x</em>) sin(2<em>x</em>)

→   cos(4<em>x</em>) - cos(8<em>x</em>) = 2 sin(6<em>x</em>) sin(2<em>x</em>)

Then

(sin(5<em>x</em>) - sin(7<em>x</em>) - sin(4<em>x</em>) + sin(8<em>x</em>)) / (cos(4<em>x</em>) - cos(5<em>x</em>) - cos(8<em>x</em>) + cos(7<em>x</em>))

= (2 cos(6<em>x</em>) sin(2<em>x</em>) - 2 cos(6<em>x</em>) sin(<em>x</em>)) / (2 sin(6<em>x</em>) sin(2<em>x</em>) - 2 sin(6<em>x</em>) sin(<em>x</em>))

= (2 cos(6<em>x</em>) (sin(2<em>x</em>) - sin(<em>x</em>))) / (2 sin(6<em>x</em>) (sin(2<em>x</em>) - sin(<em>x</em>)))

= cos(6<em>x</em>) / sin(6<em>x</em>)

= cot(6<em>x</em>)

QED

5 0
3 years ago
The function y = f(x) is graphed below. What is the average rate of change of the
stepladder [879]

Answer:

Average rate of change = 1

Step-by-step explanation:

Average rate of change of a function between x = a and x = b is defined by,

Average rate of change = \frac{f(b)-f(a)}{b-a}

We have to find the average rate of change of the function in the interval 2 ≤ x ≤ 4

Therefore, average rate of change of the function = \frac{f(4) - f(2)}{4-2}

From the graph attached,

f(4) = 4

f(2) = 2

Average rate of change = \frac{4-2}{4-2}

                                        = 1

Therefore, average rate of change of the function in the given interval is 1.

7 0
2 years ago
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