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Lunna [17]
3 years ago
11

Select the proper placement for parentheses to speed up the addition for the expression 4 + 6 + 5 

Mathematics
2 answers:
nata0808 [166]3 years ago
6 0
Im guessing that by making 10 it will speed up the addition process so it should be 
B since (6+4) = 10 then +5 =15
vlabodo [156]3 years ago
6 0
The answer is B becuase 6+4=10 10+5=15
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QUESTION 3 [10 MARKS] A bakery finds that the price they can sell cakes is given by the function p = 580 − 10x where x is the nu
Harman [31]

Answer:

(a)Revenue function, R(x)=580x-x^2

Marginal Revenue function, R'(x)=580-2x

(b)Fixed cost =900 .

Marginal Cost Function=300+50x

(c)Profit,P(x)=-35x^2+280x-900

(d)x=4

Step-by-step explanation:

<u>Part A </u>

Price Function= 580 - 10x

The revenue function

R(x)=x\cdot (580-10x)\\R(x)=580x-x^2

The marginal revenue function

\dfrac{dR}{dx}= \dfrac{d}{dx}(R(x))=\dfrac{d}{dx}(580x-x^2)=580-2x\\R'(x)=580-2x

<u>Part B </u>

<u>(Fixed Cost)</u>

The total cost function of the company is given by c=(30+5x)^2

We expand the expression

(30+5x)^2=(30+5x)(30+5x)=900+300x+25x^2

Therefore, the fixed cost is 900 .

<u> Marginal Cost Function</u>

If  c=900+300x+25x^2

Marginal Cost Function, \frac{dc}{dx}= (900+300x+25x^2)'=300+50x

<u>Part C </u>

<u>Profit Function </u>

Profit=Revenue -Total cost

580x-10x^2-(900+300x+25x^2)\\580x-10x^2-900-300x-25x^2\\$Profit,P(x)=-35x^2+280x-900

<u> Part D </u>

To maximize profit, we find the derivative of the profit function, equate it to zero and solve for x.

P(x)=-35x^2+280x-900\\P'(x)=-70x+280\\-70x+280=0\\-70x=-280\\$Divide both sides by -70\\x=4

The number of cakes that maximizes profit is 4.

6 0
3 years ago
The ratio of boys to girls in Coach Sheppard's class is 3 to 5. There are 20 girls in the
kondaur [170]

Answer:

32 Students

Step-by-step explanation:

3/5 = 12/20

This means you add the boys and girls to get 32.

8 0
2 years ago
Read 2 more answers
Ill give brainiest - please help ASAP with WORK FOR IT please and thank you!! :)<br><br> 30 points
pentagon [3]

Answer:

hope this helps .keep on learning

6 0
2 years ago
Please help me with the correct answer !!!
Nataly [62]
The answer would be D
6 0
3 years ago
I need help pls this is to confusing
OleMash [197]

Answer: the value of a is less than b because its to the left

Step-by-step explanation:

3 0
3 years ago
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