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harkovskaia [24]
3 years ago
13

Write an algebraic expression for the situation. Twice a number m plus the quantity n minus 4.

Mathematics
2 answers:
Deffense [45]3 years ago
8 0

Answer:

2m + n - 4 =

I think I’m doing this right not sure though.

Bezzdna [24]3 years ago
7 0

Answer:

2*m+n-4

Step-by-step explanation:

I'm not sure if this is correct

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A rectangular area of 36 f t2 is to be fenced off. Three sides will use fencing costing $1 per foot and the remaining side will
OLga [1]

Answer:

x = 8,49 ft

y  = 4,24  ft  

Step-by-step explanation:

Let  x be the longer side of rectangle   and  y  the shorter

Area of rectangle     =    36 ft²     36  =  x* y   ⇒ y =36/x

Perimeter of rectangle:

P  =  2x   +   2y    for convinience we will write it as    P  = ( 2x + y ) + y

C(x,y)   =  1 * ( 2x  +  y  )  +  3* y

The cost equation as function of x is:

C(x)  =  2x  + 36/x   + 108/x

C(x)  =  2x  + 144/x

Taking derivatives on both sides of the equation

C´(x)  = 2  - 144/x²

C´(x)  = 0         2  - 144/x² = 0       ⇒  2x²  -144 = 0    ⇒  x² =  72

x = 8,49 ft       y  = 36/8.49    y  = 4,24  ft    

How can we be sure that value will give us a minimun

We get second derivative

C´(x)  = 2  - 144/x²      ⇒C´´(x)  = 2x (144)/ x⁴

so C´´(x) > 0

condition for a minimum

7 0
3 years ago
Alondiscoperis building two circuior gardens. The smaller garden hos a sodius of 2 meters. The larger garden has an area that is
Vesnalui [34]

Answer:

4\pi * 7 = 28\pi

28\pi - 4\pi = 24\pi = 75.36

75 square meters

Step-by-step explanation:

7 0
3 years ago
13 - 4x = 1 - x<br><br>Step by step please​
Virty [35]

Answer:

13 - 4x = 1 - x

Subtract 13 from both sides.

-4x = -12 - x

Add x to both sides.

-3x = -12

Divide both sides by -3.

x=4

:)

3 0
2 years ago
Read 2 more answers
Plss help me plsss!!​
grin007 [14]

Answer:

  • 20 units

Step-by-step explanation:

The first part is already solved.

<u>We got the scale factor </u>

  • k = 4

<u>Use this to find the missing side:</u>

  • MN = k*YZ
  • MN = 4*5 = 20
3 0
3 years ago
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AE and DF are parallel. If √ABG = 11x and m_HCF = 10x + 9, what is m√ABG? 102° 99° 81° 9° ​
katrin [286]

Answer:

81

Step-by-step explanation:

6 0
3 years ago
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