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3 years ago

7

What is a definition of a Line ?

1 answer:

solmaris [256]3 years ago

4 0

Answer:

<u><em>noun</em></u>

1. a length of cord, rope, wire, or other material serving a particular purpose.

2. a long, narrow mark or band.

<u><em>verb</em></u>

1. stand or be positioned at intervals along.

2. mark or cover with lines.

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The formula for the surface area of a circular cylinder is SA = 2πr 2 + 2πrh cubic units. What do 2πr 2 and 2πrh represent?

Molodets [167]

Remember
area=pir^2
circumference=2pir

the surface aera if you thinkg about it is
2 times the tops+area around

the tops are circles so 2*pir^2 is tops

the area around is a rectangle that has been wrapped around the cylinder,
the hieght is the legnth and the circumference is width
so 2hpir is the area around

2pir^2 is the areas of the tops
2hpir is the area around

4 0

4 years ago

2+2. Wwwwwwwwwwwwwwwwwwwewwww

Andrews [41]

Answer:

4

Step-by-step explanation:

2+2+ 4 you have two hands put two fingers up on each of them count them!

6 0

4 years ago

Read 2 more answers

Jeffrey's brother max is 5 years older than twice Jeffrey's age. Write an expression that represents the relationship of Max's a

Illusion [34]

Jeffrey = J
Max = M

M = 2j + 5

4 0

3 years ago

Find one value of x that is a solution to the equation (x^2+3)^2=4x^2+12

Westkost [7]

Answer:

${( {x}^{2} + 3) }^{2} = {4x}^{2} + 12$

$\bf \purple{ {(x + y)}^{2} = {x}^{2} + 2xy + {y}^{2} }$

${( {x}^{2}) }^{2} + 2({x)}^{2} (3) + {(3)}^{2} = {4x}^{2} + 12$

${x}^{4} + {6x}^{2} + 9 = {4x}^{2} + 12$

${x}^{4} = {4x}^{2} - {6x}^{2} + 12 - 9$

${x}^{4} = { - 2x}^{2} + 3$

$( {x}^{2} \times {x}^{2}) = { - 2x}^{2} + 3$

$2 \times {x}^{2} = { - 2x}^{2} + 3$

$= \frac{ { - 2x}^{2} + 3 }{ {2x}^{2} }$

$= 3$

4 0

3 years ago

Solve for x: x^2 + 14x + 49

Kaylis [27]

Answer: -7twice

Step-by-step explanation:

This is a question on root of quadratic equation. The interpretation of the question

x² 14x + 49 is

x² + 14x + 49 = 0.meaning that we are to find two possible values for x that will make the expression equal 0.

We can use any of the methods earlier taught. For the purpose of this class, I am using factorization methods

x² + 14x + 49 = 0

Now, find the product of the first and the last terms, is

x² × 49 = 49×²

Now find two terms such that their productbis 49x² and their sum equals 14x, the one in the middle.

We have several factors of 49x² but only one will give sum of 14x. Because of the time, I will only go straight to the required factors .

49x² = 7x × 7x and the sum gives 14x the middle terms..

Now we now replace the middle one by the factors and then factorize by grouping.

x² + 14x + 49 = 0

x² + 7x + 7x + 49 = 0

x(x + 7) + 7(x + 7) = 0

(x + 7)(x + 7). = 0

Now to find this value of x,

x + 7 = 0

x. = -7twice.

The root of the equation = -7twice.

3 0

3 years ago