help pls don’t understand this one

Answer:

The optimal volume is 63.1142 in3, with a cut of 1.5767 inches

Step-by-step explanation:

If we make a cut of x inches to create the box, the dimensions of the box will be:

Length = 10 - 2x

Width = 9 - 2x

Height = x

So the volume of the box would be:

Volume = (10 - 2x) * (9 - 2x) * x

Volume = 4x3 - 38x2 + 90x

To find the maximum volume, we need to take the derivative of the volume and find the values of x where it is equal to zero:

dV/dx = 12x2 - 76x + 90 = 0

6x2 - 38x + 45 = 0

Using Bhaskara's formula, we have:

Delta = 38^2 - 4*6*45 = 364

sqrt(Delta) = 19.08

x1 = (38 + 19.08) / 12 = 4.7567

x2 = (38 - 19.08) / 12 = 1.5767

Testing these values in the volume equation, we have:

Volume1 = 4*(4.7567)^3 - 38*(4.7567)^2 + 90*(4.7567) = -1.1883

(Negative value for the volume is not valid)

Volume1 = 4*(1.5767)^3 - 38*(1.5767)^2 + 90*(1.5767) = 63.1142

So the optimal volume is 63.1142 in3, with a cut of 1.5767 inches

Answer:

cool

Step-by-step explanation:

Answer:

it has 3

Step-by-step explanation:

Answer: 5 is the answer

Answer:

its 5x5x5

Step-by-step explanation:

125

Answer:

25

Step-by-step explanation: you have to multiply 5 by 5 because a square has equal sides And the you’ll get 25 hope this helps

Answer:

Step-by-step explanation:

Answer:

She ran more in the afternoon

Step-by-step explanation:

0.06 is less than 0.45

Answer:

Afternoon

Step-by-step explanation:

0.45 miles is greater than 0.06 miles so Neptune ran more in the afternoon

Answer:

r = 4 inches

Step-by-step explanation:

The radius of a circle is 1/2 of the diameter

r = 1/2d

r = 8/2 = 4

Answer:

25 mm < 3 cm

Step-by-step explanation:

Change cm to mm

1 cm = 10 mm

3 cm = 3*10 = 30 mm

25 mm < 30 mm

Answer:

I think it is 9.00113750385

Step-by-step explanation:

Answer:

9 cm

Step-by-step explanation:

The area of a cylinder is V = πr² * h, where V is the volume, r is the radius of the base and h is the height. We want to solve for r. We know the value of V and h, so let's plug those in. We get 3818 = πr² * 15, and when we divide by 15, we get 254.53 = πr². We can approximate 3.14 for π, and when we do so, we get 254.53 = 3.14r². Dividing by 3.14 gets us 81.02 = r², and when we take the square root of the equation, we get r≈9 cm. Hope this helps!

Its a for connexus academy grade 8 test

Step-by-step explanation:

It just is

Answer:

q 1 is 24.5 and q3 is 34  

Step-by-step explanation:

bye my luvvv

Answer:

[tex]x < 2.5[/tex]

Step-by-step explanation:

[tex] - 4x + 5 > - 5 \\ - 4x > - 5 - 5 \\ - 4x > - 10 \\ \frac{ - 4x}{ - 4} > \frac{ - 10}{ - 4} \\ x < \frac{5}{2} \\ x < 2.5[/tex]

hope this helps

brainliest appreciated

good luck! have a nice day!

Answer:

Just write whatever it says so quotient means divide, more means add, and product means multiply

x/4+1

Make your the equation is in order by checking the words after, than, next to see if the equation is in order

Hope this helps

If you have any questions you can ask

Step-by-step explanation:

Answer:

You do in some situations have to break apart a solid figure in a certain way to find it's volume. Everything is made up out of some type of shape. You just have to find the right formula. Some solid figures you might have a cube and a pyramid. Each one of those has it's specail way of finding volume.

Step-by-step explanation:

Losers Club units again my pal

Step-by-step explanation:

sosos

Answer:

4x-3=2x+7

4x-2x=7+3

2x=10

10/2x=5

therefore x=5

....hope this helps

[tex]4x-3=2x+7\\4x-2x=7+3\\2x=10\\x=5[/tex]

Answer: if this is multiple choice It’s

B. A syllogism

Step-by-step explanation:

Answer:

-1.25

Step-by-step explanation:

Your points one the graph are (-4,4) and (0,-1)

Formula for slope is y1-y2/x1-x2

4--1/-4-0

5/-4

-1.25

Answer:

1/3

Step-by-step explanation:

pyramid height = cube height , a = h (GIVEN)

[tex]so, v= \frac{1}{3} * a^{2} * h = \frac{1}{3} * a^{3}\\a = \sqrt[3]{3v} = \sqrt[3]{3*729} = 13 in\\\\cube volume = a^{3} = 13^{3} = 2187 in^{3} \\\\ratio = \frac{729}{2187}= \frac{1}{3} (ANS)[/tex]

Answer:

∠ D = 35°

Step-by-step explanation:

∠ D is formed by a tangent and a secant and is one half the difference of the measure of the intercepted arcs, that is

∠ D = 0.5( arc EH - arc GE )

      = 0.5(95 - 25)° = 0.5 × 70° = 35°

Answer:

(-2,1)

Step-by-step explanation:

The bracket is an opened interval

zero is neutral either positive or Negative

so the range of values in (-2,1) is -1,0 with corresponding values 2 each

hence, they're positive

Answer:

B -2,1

Step-by-step explanation:

Answer:

1. B) 5.7

2. A) 12

3. A) 11.4

4. A) 5.7

5. A) 16.2

6. A) 11.2

7. No, they do not form a right triangle

8. Yes, they do form a right triangle

Step-by-step explanation:

Extra tip: The hypotenuse has to be less than both sides added together, but cannot be more than either of the sides alone.

1.

16² + b² = 17²

256 + b² = 289

256 - 256 + b² = 289 - 256

b² = 33

√b² = √33

b = 5.74 or 5.7

2.

16² + b² = 20²

256 + b² = 400

256 - 256 + b² = 400 - 256

b² = 144

√b² = √144

b = 12

3.

7² + 9² = c²

49 + 81 = c²

130 = c²

√130 = √c²

11.40 or 11.4 = c

4.

7² + b² = 9²

49 + b² = 81

49 - 49 + b² = 81 - 49

b² = 32

√b² = √32

b = 5.65 or 5.7

5.

a² + 5² = 17²

a² + 25 = 289

a² + 25 - 25 = 289 - 25

a² = 264

√a² = √264

a = 16.24 or 16.2

6.

10² + b² = 15²

100 + b² = 225

100 - 100 + b² = 225 - 100

b² = 125

√b² = √125

b = 11.18 or 11.2

7.

15² + 8² = 16²

225 + 64 = 256

289 ≠ 256

8.

5² + 12² = 13²

25 + 144 = 169

169 = 169

Answer:

Volume of composite is 483  [tex]mm^3[/tex]

Step-by-step explanation:

We need to add the volume of a rectangular prism (7 mm x 12 mm x 3 mm) to a semi-cylinder (of radius 3.5 mm and height 12 mm):

Volume of the prism = 7 x 12 x 3 [tex]mm^3[/tex]  = 252 [tex]mm^3[/tex]

Volume of the semi-cylinder =  [tex]\frac{\pi\,\,R^2\,\,H}{2} = \frac{\pi\,\,(3.5)^2\,\,(12)}{2} =230.907 \,\,mm^3[/tex]

Therefore the sum of both volumes gives:

(252 + 230.907) [tex]mm^3[/tex] = 482.907  [tex]mm^3[/tex]

WHich can be rounded to the nearest whole number as: 483 [tex]mm^3[/tex]

Answer:

The first option

Step-by-step explanation:

Answer:

4/27

Step-by-step explanation:

The laws of exponent are used for the simplification of expressions with exponential powers. Considering the given expression, the applicable laws of exponents are

a^-x = (1/a)^x

and

a^(x/b) = b√a^x

Hence

9-3/2 · 82/3

= (1/9)^3/2 . 8^2/3

= √(1/9)³ . ∛8²

= (1/3)³ . 2²

= 1/27 . 4

= 4/27

Answer:

g(x)=0.8x+1.6

Step-by-step explanation:

To do this, you need to isolate the variable y, so that when you input x it will immediately return the value of y.

[tex]-4x-6=-5y+2[/tex]

Subtract 2 from both sides:

[tex]-4x-8=-5y[/tex]

Divide both sides by -5:

[tex]y=0.8x+1.6\\\\g(x)=0.8x+1.6[/tex]

Hope this helps!

Answer:

g (x) = 4/5x + 8/5

Step-by-step explanation:

-4x - 6 = -5y + 2

5y = 4x + 8

y = 4/5x + 8/5

Step-by-step explanation:

middle section= 390

sides=270

total=930 chairs

Answer:

it's most likely 4,000 kilometers because centimeters are a very small rate of measurement and the distance between the 2 landmarks are very far away

Answer:

[tex]y = 2 (x-7)^{2} +6[/tex] is the equation of parabola.

Step-by-step explanation:

Vertex form of a parabola is given as :

[tex]y = a (x-h)^{2} +k ...... (1)[/tex]

(h,k) is the co-ordinate of vertex of parabola.

(x,y) are the points on parabola.

We are given that vertex is at (7,6) and a point on parabola is (6,8).

h = 7

k = 6

x = 6 and

y =8

Putting all the values in equation (1):

[tex]8 = a (6-7)^{2} +6\\\Rightarrow 8 = a + 6\\\Rightarrow a = 2[/tex]

Putting values of (h,k) and a in equation (1) to obtain the equation of parabola:

[tex]y = 2 (x-7)^{2} +6[/tex] is the equation of parabola with vertex at (7,6) and contains the point (6,8).

Answer:

Step-by-step explanation:

y = 2x2 – 28x + 52

wrong its not that

Answer: 100.53

Step-by-step explanation:

Circumference = 2 x pi x r

= 2 x 22/7 x 16