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Svetlanka [38]
3 years ago
7

Will give brainliest answer

Mathematics
2 answers:
vovangra [49]3 years ago
8 0

Answer:

A=50.26548246units^2

Step-by-step explanation:

Radius is 4 because half the diameter (8) is the radius (4)

A=πr^2

A=π(4)^2

A=50.26548246units^2

Papessa [141]3 years ago
3 0

Answer:

16 pi unit^2

Step-by-step explanation:

The diameter is 8 so we can find the radius

r = d/2 =8/2 = 4

The area is given by

A = pi r^2

A = pi ( 4)^2

A = pi *16

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Y=1/2x+3 y=5 i need help
Ilya [14]

Answer:

x=4

Step-by-step explanation:

4 0
3 years ago
A bookcase has a mass of 20 kilograms. A book in the bookcase has a mass of 500 grams.
dimaraw [331]

Answer:

Step-by-step explanation:

Remark

You have to convert one of the numbers. It doesn't matter which one, but you can't simply divide one into the other the way the numbers stand.

Conversion

20 kilograms = 20 * 1000 grams / kg

20 kilograms = 20000 grams

Formula

Number of books = mass of bookcase / mass of 1 book

Givens

number of books = ??

mass of bookcase = 20000 grams

mass of one book = 500 grams

Solution

number of books = 20000 / 500

number of books = 40

Answer: 40 books =  mass of bookcase

6 0
2 years ago
Find b, if a is (5, -3) and m (-4, 2) is the midpoint of ab
Dennis_Churaev [7]
We were given the points, A(5,-3) and the midpoint of AB, M(-4,2).

Let point B have coordinates (c , d).

Then the midpoint of A(5, -3) and B(c,d)


= ( \frac{5 + c}{2}    \:  \:  \:  \frac{ - 3 + d}{2} )
Now let us compare to the given midpoint M(-4, 2).

We can then write the following equations for the corresponding coordinates.

Comparing x coordinates, we have;

\frac{ 5 + c}{2}  =  - 4
Multiplying both sides of the equation by 2 gives,

5+c = 2(-4)

Simplifying the right hand side gives,

5 + c = -8

Grouping like terms, we have,

c = -8 - 5

This simplifies to,
c = -13


Comparing y coordinates we have,

\frac{ - 3 + d}{2}  = 2
Multiplying through by 2 gives,

-3 + d = 2(2)

This means that,

-3 + d = 4

Making the subject we have,

d = 4+3

This implies that,

d = 7

Hence the coordinates of B are (-13,7).
6 0
3 years ago
A square with area 144 has the same perimeter as a rectangle with width 3. What is the length of the rectangle?
zvonat [6]

Answer:

48

Step-by-step explanation:

4 0
3 years ago
Help please, it’s easy
KonstantinChe [14]
5) 11 centimeters of string
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8 0
3 years ago
Read 2 more answers
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