3 years ago

25 POINTS!

Mathematics

1 answer:

bekas [8.4K]3 years ago

6 0

Answer:

y-5=4(x+3)

Step-by-step explanation:

y-y1=m(x-x1)

y-5=4(x-(-3))

y-5=4(x+3)

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A jeweler wants to minimize business costs and has found that the average cost in dollars per necklace is given by C(x)=0.5x^2-7

Vika [28.1K]

Answer:

The maximum cost is 41 dollars per necklace.

Step-by-step explanation:

The average cost in dollars/necklace is given by :

$C(x)=0.5x^2-7x+65.5$ .....(1)

Where

x is the number of necklaces that are created

To maximize the cost, find the value of x by putting dC/dx = 0

$\dfrac{d}{dx}(0.5x^2-7x+65.5)=0\\\\x-7=0\\\\x=7$

Now put the value of x = 7 in equation (1).

$C(x)=0.5(7)^2-7(7)+65.5\\\\=41\ \text{dollars per necklace}$

Hence, the maximum cost is 41 dollars per necklace.

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3 years ago

What is the rate of change between (-32,0) and (-31,2)

Brums [2.3K]

2-0/ -31 - -32
= 2-0/ -31 + 32
= 2/1
= 2

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2 years ago

It takes you 45 minutes to clean the fish tank and it takes your sister 30 minutes. how long does it take the two of you working

katen-ka-za [31]

It takes you 45 minutes to clean the fish tank and it takes your sister 30 minutes. how long does it take the two of you working together to clean the fish tank

Answer:

My 1 minute work = $\frac{1}{45}$

My sisters 1 minute work = $\frac{1}{30}$

My and My sister's 1 minute work = $\frac{1}{45}+\frac{1}{30}$

= $\frac{5}{90}$

= $\frac{1}{18}$

$\therefore$ Me and My sister will finish the work in $\frac{18}{1} =18$ minutes

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3 years ago

Steve has $25,000 to invest and wishes to earn an overall annual rate of return of 8%. His financial advisor recommends that he

yulyashka [42]

I hope this helps, let me know if it doesn't make sense

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3 years ago

The price of a watch was increased by 7% to 1350. what was the price before increase?

Ad libitum [116K]

Answer:

The price before increase = 1255.5

Step-by-step explanation:

7% of 1350 = $\frac{7*1350}{100}$

= 94.5

The price before increase = 1350 - 94.5

The price before increase = 1255.5

6 0

3 years ago

Read 2 more answers