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cupoosta [38]
3 years ago
11

GUYSSSSSSS I NEED HELP

Mathematics
1 answer:
Arada [10]3 years ago
6 0

Answer:

3 is the answer pls like me it is the correct one ty

Step-by-step explanation:

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A rectangular storage container with an open top is to have avolume
IRINA_888 [86]

Answer:

Dimensions of the container:

x = 3 m

y = 6 m

h = 1.1 m

C(min) = 270 $

Step-by-step explanation:

Volume of storage container

V = 20 m³

Let  "y" be the length    and  "x" the width   then y = 2*x

V = x*y*h    ⇒  V = 2*x²*h      ⇒   20 = 2*x²+h      ⇒  h  =  10/ x²

Costs:

Total cost = cost of base  ( 5*2*x² )  + cost of side with base x  ( 2*9*x*h) +

cost of side witn base y =2x   (2*9*2x*h)

C(t)  = 10*x²  +  18*x*h  +  36*x*h

C(x)  = 10x²  + 54*x*10/x²      ⇒  C(x)  10*x²   +  540 /x

Taking derivatives on both sides of the equation we get:

C´(x)  =  20*x  -  540/x²

C´(x)  =  0        ⇒  20*x  -  540/x²  =  0   ⇒  2x  - 54/x²   = 0

2x³ - 54  = 0

x³  = 27       x  =  3 m

Then  y  =  2*x    ⇒ y = 2*3   y = 6     and  h  =  10 / x²       h  = 1.1 m

And the minimum cost is

C (min)  =  10*x²  +  540/x     ⇒      C (min)  =  90 + 180

C(min) = 270 $

5 0
4 years ago
SM=3x−4, and RN=9x−20. Find the value of x
Rudik [331]

Answer:

Option (A).

Step-by-step explanation:

Given question is incomplete; find the complete question with the attachment.

In the triangle NRL,

Points P, S and M are the midpoints of the sides NR, RL and LN respectively.

Sides SM = (3x - 4), NR = (9x - 20)

By the theorem of midpoints in a triangle,

SM = \frac{1}{2}\text{NR}

(3x - 4) = \frac{1}{2}(9x-20)

6x - 8 = 9x - 20

9x - 6x = 20 - 8

3x = 12

x = 4

Therefore, Option (A) will be the answer.

8 0
3 years ago
What is the area of the irregular pentagon
V125BC [204]

Answer:

Answer  is 105 in^2

Step-by-step explanation:   Area of rectangle= length X breadth

= 8X12

=96in^ 2

Area of triangle= 1/2 X  base X height

= 1/2 X 3 X 6

= 9 in^2

Area of irregular pentagon = area of triangle + area of rectangle

= 96+9

=105 in ^2


8 0
4 years ago
Read 2 more answers
The value of x is ...?
Semenov [28]

Answer:

X = 64

Step-by-step explanation:

Comparing the two triangle put the right angle into consideration.

(17 + X)/(X + 8) = (X + 8)/X

Cross multiplying

X(17 + X) = (X + 8)(X + 8)

17X + X^2 = X^2 + 8X + 8X + 64

Collecting like terms

X^2 - X^2 + 17X - 8X - 8X = 64

X = 64

5 0
4 years ago
What is the graph for y=-3x-2
Korolek [52]

Answer:

Below is the graph which answers your question. Hopefully this helps :)

Mark me the brainliest ♤♤

4 0
4 years ago
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