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sergeinik [125]
3 years ago
11

Help the question is in the picture please help help

Mathematics
1 answer:
Reika [66]3 years ago
7 0
I just tried to help someone with the same problems. I hope this helps you

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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.

8 0
3 years ago
Janna jumped 156 inches in the long jump competition at the high school track meeting . how many feet did janna jump?
Fiesta28 [93]
Janna jumped 13 feet. Hope it help!
4 0
3 years ago
Fifteen less than twice a number is less than or equal to -23
lutik1710 [3]
I would think the answer is -16 

but that's is what i think

5 0
3 years ago
PLEASE HELP 20 POINTS
Tanzania [10]

The sinusoid makes a complete oscillation (i.e. 360°) every 3 seconds. So, in one second it makes 1/3 of a turn, leading to 360°/3 = 120°.


So, the correct answer is the last one.

7 0
3 years ago
Ari is setting up a fish tank for his goldfish. The tank holds 15 gallons of water. If each gallon of water weighs 8.3 pounds, h
IrinaVladis [17]

Answer:

124.5

Step-by-step explanation:

All you need to do is multiply.

15*8.3=124.5

This is because The total water in Ari's fish tank has 15 gallons, and each gallon has 8.3, so you multiply.

6 0
2 years ago
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