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vichka [17]
3 years ago
11

A square pyramid is shown. What is the surface area?

Mathematics
2 answers:
Blizzard [7]3 years ago
4 0

Answer:

  • C. 31.25 cm²

Step-by-step explanation:

<u>Surface area comprises of:</u>

  • A = Area of square base + 4(area of triangle faces)
  • A = 2.5² + 4*1/2*2.5*5= 31.25 cm²

Correct option is C

Leya [2.2K]3 years ago
4 0

Answer:

its 31.25 i took the test and got it right

Step-by-step explanation:

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Find the value of x.
Gnoma [55]

Answer:

x = 10

Step-by-step explanation:

Since the triangle is right use the sine ratio to find x

sin30° = \frac{opposite}{hypotenuse} = \frac{5}{x}

cross- multiply

x × sin30° = 5 ( sin30° = 0.5 )

0.5x = 5 ( divide both sides by 0.5 )

x = 10

5 0
3 years ago
Read 2 more answers
1<br> The coefficient of x2 in the expansion of 2x +1 by 3 whole square
posledela

Answer:

1 +6 x + 12 x 2 + 8x 3

Explanation:

We must use our knowledge of the binomial expansion:

Method 1:

We can use:

(

x

+

1

)

n

=

1

+

n

x

+

n

(

n

−

1

)

2

!

x

2

+

n

(

n

−

1

)

(

n

−

2

)

3

!

x

3

+

...

Substituting  

n

=

3

and  

x

for  

2

x

 

⇒

(

2

x

+

1

)

3

=

1

+

(

3

⋅

2

x

)

+

3

⋅

2

2

!

⋅

(

2

x

)

2

+

3

⋅

2

⋅

1

3

!

⋅

(

2

x

)

3

 

=

1

+

6

x

+

12

x

2

+

8

x

3

Method 2:

We can use:

(

A

+

B

)

n

=

A

n

+

(

n

1

)

A

n

−

1

B

1

+

(

n

2

)

A

n

−

2

B

2

+

...

Letting  

A

=

2

x

and

B

=

1

for this circumstance:

(

2

x

+

1

)

3

=

(

2

x

)

3

+

(

3

1

)

(

2

x

)

2

(

1

)

+

(

3

2

)

(

2

x

)

1

(

1

)

2

+

(

3

3

)

(

2

x

)

0

(

1

)

3

=

8

x

3

+

12

x

2

+

6

x

+

1

Step-by-step explanation:

6 0
3 years ago
Part two out of six plz
podryga [215]
Factors of 24:
1,2,3,4,6,8,12,24

factors of 84:
1,2,3,4,6,7,12,14,21,28,42

highest common factor of 24 and 84:
12

Hope this helps!
6 0
3 years ago
Select all the situations that describe adding or subtracting opposites to make zero.
jeka94
It would be option number 3 and option number 4
4 0
3 years ago
Read 2 more answers
jason stands on s scale with two 2,5kg hand weights, on in each hand. The scale shiws 98kg. Calculate Jason's weight​
Inessa05 [86]

Answer:

93 KG

Step-by-step explanation:

2.5 + 2.5 = 5 KG

98 - 5 KG = 93 KG IS JASON'S WEIGHT

8 0
3 years ago
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