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Andrews [41]
3 years ago
10

This is dealing with graphing functions

Mathematics
1 answer:
Mnenie [13.5K]3 years ago
6 0
Can you add the graphs?    EDIT: When I graph it this is what I get.


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A candy box is made from a piece of cardboard that measures 23 by 13 inches. Squares of equal size will be cut out of each corne
wolverine [178]

Answer:

2.67 inches.

Step-by-step explanation:

Assuming that we represent the size of the squares with the letter y, such that after the squares are being cut from each corner, the rectangular length of the box that is formed can now be ( 23 - 2y), the width to be (13 - 2y) and the height be (x).

The formula for a rectangular box = L × B × W

= (23 -2y)(13-2y) (y)

= (299 - 46y - 26y + 4y²)y

= 299y - 72y² + 4y³

Now for the maximum volume:

dV/dy = 0

This implies that:

299y - 72y² + 4y³ = 299 - 144y + 12y² = 0

By using the quadratic formula; we have :

= \dfrac{-b \pm \sqrt{b^2 -4ac}}{2a}

where;

a = 12; b = -144 and c = 299

= \dfrac{-(-144) \pm \sqrt{(-144)^2 -4(12)(299)}}{2(12)}

= \dfrac{144 \pm \sqrt{20736 -14352}}{24}

= \dfrac{144 \pm \sqrt{6384}}{24}

= \dfrac{144 \pm79.90}{24}

= \dfrac{144 + 79.90}{24} \ \  OR  \ \   \dfrac{144 - 79.90}{24}

= 9.33 \ \  OR  \ \ 2.67

Since the width is 13 inches., it can't be possible for the size of the square to be cut to be 9.33

Thus, the size of the square to be cut out from each corner to obtain the maximum volume is 2.67 inches.

3 0
3 years ago
Marc's workout consists of swimming and practicing yoga. While swimming he burns 7 calories per minute, and while practicing yog
Scorpion4ik [409]

Answer:

7x + 5y ≥ 400

Step-by-step explanation:

Given:

Swimming burns = 7 calories per minute

Yoga burns = 5 calories per minute

At least calories burn = 400

Total minutes of swimming = x

Total minutes of yoga = y

Find:

Inequality

Computation:

7 calories per minute(Total minutes of swimming) + 5 (Total minutes of yoga) ≥ 400

7x + 5y ≥ 400

7 0
3 years ago
Jonathan purchases 15 pounds of bananas for $.49 a pound. How much did Jonathan pay
ExtremeBDS [4]

Answer:

$7.35

Step-by-step explanation:

To find the answer to this question, you would need to multiply 15 times .49 which would equal 7.35

5 0
3 years ago
Andy gets 5 out of 15 questions wrong his maths test. What fraction of the answer Correctly. questions does, Andy answer correct
nexus9112 [7]

Answer:

It’s going to be 10/15 he answered correctly.

Step-by-step explanation:

It’s 10/15

If you want to know a easy way to find the answer for some cases, questions you can subtract it the whole number of questions, and you just do 15 - 5 = 10

So he got 10 questions right out of 15.

6 0
2 years ago
Find the solution<br> y = -3x + 4 y = 3x - 2 <br><br> X=<br><br> Y =
liraira [26]

Answer:

The answer is

X=1

Y=1

Step-by-step explanation:

- 3x + 4 = 3x - 2 \\ 6x = 6 \\ x = 1 \\ then \\ y = ( - 3 \times 1) + 4 \\ y = 1

If you need any explanation you can communicate with me on Whats on this number +01557831028, face, instaand email

3 0
3 years ago
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