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pav-90 [236]
2 years ago
8

Plz plz plz answer fast and sub to Pewdiepie

Mathematics
2 answers:
Brilliant_brown [7]2 years ago
6 0
C I just took the test
Elodia [21]2 years ago
6 0

Answer:

(C)

Step-by-step explanation:

plz give brainlist

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The surface area of the prism below is 264 square units . Find the missing dimensions of this prism. ( picture is in the picture
nignag [31]

Answer:

The missing dimension is 4 units.

Step-by-step explanation:

In the given prism,

Of all the surfaces,

There are three rectangular surfaces and two triangular surfaces

<h2>Analyzing areas of rectangular surfaces:</h2>

1)The two rectangles with dimensions of 15 units and 5 units:

The area of each rectangle = Length of rectangle \times Breadth of rectangle

From the diagram,

Length of rectangle = 15 units,

Breadth of rectangle = 5 units.

Area of each rectangle = 15\times 5 ;

Area of each rectangle = 75 square units.

Sum of areas of the two rectangles = 2\times 75

Sum of areas of the two rectangles = 150 square units (equation 1)

2) The rectangle with the dimensions 15 units and 6 units:

The area of thus rectangle=  Length of rectangle \times Breadth of rectangle

From the diagram,

Length of rectangle = 15 units,

Breadth of rectangle = 6 units.

Area of the rectangle = 15\times 6 ;

Area of the rectangle = 90 square units. (equation 2)

From equation 1 and equation 2,

Therefore sum of areas of all rectangles in the prism = 150 + 90

Sum of areas of rectangles = 240 square units.

We also know,

Total surface area of the prism = Sum of areas of triangles + Sum areas of rectangles

Given, Total surface area of prism = 264 square units.

Therefore from the formula,

Sum of areas of triangles = Total surface area - sum of areas of reactangles

Sum of areas of triangles = 264 - 240

Sum of areas of triangles = 24 square units. (equation 3)

Let the missing dimension be 'h units'

<h2>Calculating sum of areas of triangles:</h2>

From diagram,both triangles are congruent,hence have the same area

Area of a triangle = \frac{1}{2}\times base\times height

From diagram,

Base = 6 units,

Height = h units.

Area of a triangle =\frac{1}{2}\times 6\times h = 3h square units.

Sum of the areas of both triangles = 3h+3h = 6h square units.

Using equation 3, we get

6h = 24;

h = \frac{24}{6}

Therefore,

h = 4 units.

Therefore,

The missing dimension is 4 units.

4 0
3 years ago
????? HELP ??????? Thank u
makvit [3.9K]

Answer:

b

Step-by-step explanation:

5 0
2 years ago
ABCD is a rectangle. Find the length of each diagonal. AC = 2(x – 3) BD = x + 5
postnew [5]
Diagonals of rectangles are equal. AC = BD, so 2(x-3) = x+5. 2x - 6 = x+5. x = 11. Plug this into x+5 and you get 11 +5 = 16.

3 0
2 years ago
Consider x + 4 = x + 8. What values could be substituted for x to make this a true number sentence? explain how you know
Pachacha [2.7K]

Answer:

There are no values of x that make the equation true

The system has no solution

Step-by-step explanation:

we have

x+4=x+8

Solve for x

Subtract x both sides

x+4-x=x+8-x

4=8 -----> is not true

therefore

Is a inconsistent system

There are no values of x that make the equation true

The system has no solution

4 0
3 years ago
Please help me with this !
baherus [9]

M-N is M-N=2x^2+11x-9

Option B is correct.

Step-by-step explanation:

If M=5x^2+7x-4 and N=3x^2-4x+5 then find M-N

We need to subtract N from M

We will combine like terms (terms having same variable and exponent) and then solve them:

M=5x^2+7x-4

N=3x^2-4x+5

M-N=5x^2+7x-4-(3x^2-4x+5)\\M-N=5x^2+7x-4-3x^2+4x-5\\Combining\,\,like\,\,terms:\\M-N=5x^2-3x^2+7x+4x-4-5\\M-N=2x^2+11x-9

So, M-N is M-N=2x^2+11x-9

Option B is correct.

Keywords: Solving Polynomials

Learn more about Solving Polynomials at:

  • brainly.com/question/11207748
  • brainly.com/question/1332667
  • brainly.com/question/1357167

#learnwithBrainly

6 0
3 years ago
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