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ElenaW [278]
3 years ago
9

2x - 12 = 18 Algebra amazing huh​

Mathematics
2 answers:
Inessa [10]3 years ago
8 0

Answer:

x=15

Step-by-step explanation:

Vlad1618 [11]3 years ago
7 0

Answer:

x=15

Step-by-step explanation:

2x-12=18

2x-12 + 12= 18 + 12

2x=30

2x/2=30/2

x=15

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We need to notice that SSSS does not exist as a method to prove that parallelograms are congruent

Counterexample

As we can see we have the same measure of the side of the intern angles of the figures are different therefore we can't use SSSS to prove congruence

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a cylinder shaped can needs to be constructed to hold 400 cubic centimeters of soup. the material for the sides of the can costs
fredd [130]

The dimensions of the can are radius of can = 4cm and

height of can = 78.6cm

What is the volume of cylinder?

A cylinder can be seen as a collection of multiple congruent disks, stacked one above the other. In order to calculate the space occupied by a cylinder, we calculate the space occupied by each disk and then add them up.

Thus, the volume of the cylinder can be given by the product of the area of base and height.

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According to the given question:

We have V cylinder = V = 400cc

We will first find the areas involved

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For lateral area we need to get h the height of the cylinder as function of x

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Now the total area of the cylinder is:

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A(x) =  2*π*x² + 800/x

Taking derivatives:

A´(x)  =  4πx  - 800/x²

A´(x) = 0                4πx  - 800/x² =0     ⇒ πx - 200/x² = 0

( πx³  -  200 )/ x²  = 0      

πx³  -  200 = 0      

x = 4 cm

and h = 400/πx²    ⇒  h = 78.6 cm

To know more about volume of cylinder visit

brainly.com/question/24337953

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