1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stellarik [79]
3 years ago
13

Maths help please!!!!!!!!!!!

Mathematics
1 answer:
Vanyuwa [196]3 years ago
6 0

Answer:

Step-by-step explanation:

Remark

Assume all of the sheet of plywood is to be used.

Front and back = 2 * 2x *h

Top and Bottom = 2 * 2x * x

Left/Right side = 2 * x * h

Total area = 4xh + 4x^2 + 2xh

Total area = 6xh + 4x^2

Total area = 600

6xh + 4x^2 = 600

h = (600 - 4x^2)/6x

h = 100/x - 2/3 x

Volume = x * 2x * h

Volume = 2x^2 * (100/x - 2/3 x)

Volume = 200x - 4/3  x^3

I can do this without calculus (I think), but it is much easier to use it.

dV/dx = 200 - 4x^2

This is a maximum when dV/dx = 0

dV/dx = 200 - 4x^2 = 0

4x^2 = 200

x^2 = 50

x = 5√2

You might be interested in
You have a can that is in the shape of a cylinder. It has a volume of about 1,728 cubic centimeters. The height of the can is 22
MakcuM [25]
V=πr^2h 

V= volume, r=radius, and h=height

Plug in what you know. 

1,728= 3.14*r^2*22 

Combine like terms. 

1,728= 69.08*r^2

Divide both sides by 69.08. 

25. 0144759.... Round down to 25. 

25=r^2

The square root of 25. 

r=5

The radius is about 5 centimeters. 

I hope this helps!
~kaikers
7 0
3 years ago
Read 2 more answers
Sheree drew this model of a tent. It is in the shape of a triangular prism. How many square inches of fabric are needed to make
Gwar [14]

Answer:

Step-by-step explanation:

144

4 0
3 years ago
Keaton wrote the following paragraph proof for the Vertical Angles Theorem: The sum of angle 1 and angle 4 and the sum of angle
Stella [2.4K]
<span>For the Vertical Angle theorem, if a slant line is intersected by a horizontal, the opposite angles must be equal. In here, he stated that the sum of angle 1 and angle 4 and the sum of angle 3 and angle 4 are each equal to 180 degrees. It means that the sum of angle 1 and angle 4 is equal to the sum of angle 3 and angle 4 by the transitive property of equality. </span>
5 0
3 years ago
Read 2 more answers
Convert the following systems of equations to an augmented matrix and use Gauss-Jordan reduction to convert to an equilivalent m
Rasek [7]

Answer:

System of equations:

x_1+2x_2+2x_3=6\\2x_1+x_2+x_3=6\\x_1+x_2+3x_3=6

Augmented matrix:

\left[\begin{array}{cccc}1&2&2&6\\2&1&1&6\\1&1&3&6\end{array}\right]

Reduced Row Echelon matrix:

\left[\begin{array}{cccc}1&2&2&6\\0&1&1&2\\0&0&1&1\end{array}\right]

Step-by-step explanation:

Convert the system into an augmented matrix:

\left[\begin{array}{cccc}1&2&2&6\\2&1&1&6\\1&1&3&6\end{array}\right]

For notation, R_n is the new nth row and r_n the unchanged one.

1. Operations:

R_2=-2r_1+r_2\\R_3=-r_1+r_3

Resulting matrix:

\left[\begin{array}{cccc}1&2&2&6\\0&-3&-3&-6\\0&-1&1&0\end{array}\right]

2. Operations:

R_2=-\frac{1}{3}r_2

Resulting matrix:

\left[\begin{array}{cccc}1&2&2&6\\0&1&1&2\\0&-1&1&0\end{array}\right]

3. Operations:

R_3=r_2+r_3

Resulting matrix:

\left[\begin{array}{cccc}1&2&2&6\\0&1&1&2\\0&0&2&2\end{array}\right]

4. Operations:

R_3=\frac{1}{2}r_3

Resulting matrix:

\left[\begin{array}{cccc}1&2&2&6\\0&1&1&2\\0&0&1&1\end{array}\right]

4 0
3 years ago
Ava, Kate, and Jin bring all the food to a picnic. Ava brings 34, Kate brings 16, and Jin brings 112. Enter a numerical expressi
juin [17]

Answer:

Step-by-step explanation:

Given that:

Ava bring 34 food to the picnic

Kate bring 16 food to the picnic

JIn brings 112 food to the picnic

To enter these digits by applying equivalent fractions with a denominator of 12;

Their respective numerical expression is:

Ava = \dfrac{34}{12}

Ava brought 2 \dfrac{5}{6} food to the picnic

Kate = \dfrac{16}{12}

Kate brought 1 \dfrac{1}{3} food to the picnic

Jin = \dfrac{112}{12}

Jin brought 9 \dfrac{1}{3} food to the picnic

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the sum of 1 minus 7\12
    11·2 answers
  • plz help its urgent i will rate brainliest Your actual height: ___154.cm__________ Your height in the picture: 10cm The height o
    10·1 answer
  • If ​$450 is invested for one year at 12.1​%simple​ interest, how much interest is​ earned?
    13·1 answer
  • In a_____ tax system, the tax rate gets higher as the taxable income gets larger
    14·1 answer
  • Jonas is planning out his route for an upcoming race. He uses negative numbers to represent points beforethe finish line and pos
    5·2 answers
  • How do i construct congruent segments using tools like a compass and straight edge?
    11·1 answer
  • Drag the tiles to the correct boxes to complete the pairs. Match each expression to the correct verbal description. 8 added to t
    9·1 answer
  • Does anyone know how to solve this?
    13·1 answer
  • Will mark brainliest for having the steps.<br> prove tan(2x) = tan(x+x)
    11·2 answers
  • A pizza company offers a 5-topping large pizza for $22. They also offer a 3-topping large pizza for $18. Write a linear equation
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!