All categories

3 years ago

Please answer this correctly

Mathematics

2 answers:

kicyunya [14]3 years ago

7 0

Answer: 593.46 mm²

Step-by-step explanation:

The diameter of the big circle is 2(7) + 20 = 34

divide the diameter by 2 to get the radius (r) = 17

Area = π·r²

= π(17)²

= 289 π

The diameter of the big circle is 20

divide the diameter by 2 to get the radius (r) = 10

Area = π·r²

= π(10)²

= 100 π

The area of the shaded region is the difference between the area of the big circle and the area of the small circle.

$Area_{shaded}=Area_{big}-Area_{small}$

= 289 π - 100 π

= 189 π

= 189(3.14)

= 593.46

g100num [7]3 years ago

4 0

Answer:

593 $mm^{2}$

Step-by-step explanation:

3.14 × $17^{2}$ = 907.46

3.14 × $10^{2}$ = 314

907.46 - 314 = 593.46

You might be interested in

Hira is rollerblading at 9 m/s. Danni is climbing at 7 m/s. Amelia is cartwheeling at 2 m/s.

anyanavicka [17]

Answer:

Hira

Step-by-step explanation:

They are going at the fastest speed as 9 is the most

5 0

2 years ago

Read 2 more answers

The circumference of a circle is equal to n times its diameter. Estimate the circumference of a round swimming pool that has a d

sdas [7]

Answer: An estimate done quickly: The circumference is about 75 ft.

Step-by-step explanation:

Round π to 3, and 24 to 25. 3 times 25 is 75

A more exact value would be 75.36

3.14 × 24 = 75.36

5 0

2 years ago

The results are shown in the circle graph. Find arc mAB

Ainat [17]

If you show me a picture of the problem I could help you, but I can’t see the circle sooo I can’t help u unless I see it

8 0

3 years ago

Apply Crammer's Rule to find the solution to the following quations .2x + 3y = 1, 3x + y = 5

Bond [772]

Answer:

The solution to the equation system given is:

x = 2
y = -1

Step-by-step explanation:

First, we must know the equations given:

2x + 3y = 1
3x + y = 5

Following Crammer's Rule, we have the matrix form:

$\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] =\left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]$

Now we solve using the determinants:

$x=\frac{\left[\begin{array}{ccc}1&3\\5&1\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(1*1)-(5*3)}{(2*1)-(3*3)} = \frac{1-15}{2-9} =\frac{-14}{-7} = 2$

$y=\frac{\left[\begin{array}{ccc}2&1\\3&5\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(2*5)-(3*1)}{(2*1)-(3*3)}=\frac{10-3}{2-9} =\frac{7}{-7}=-1$

Now, we can find the answer which is x= 2 and y= -1, we can replace these values in the equation to confirm the results are right, with the first equation:

2x + 3y = 1
2(2) + 3(-1)= 1
4 - 3 = 1
1 = 1

And, with the second equation:

3x + y = 5
3(2) + (-1) = 5
6 - 1 = 5
5 = 5

4 0

2 years ago

An oblique prism with a square base of edge length x units has a volume of One-halfx3 cubic units. Which expression represents t

Marysya12 [62]

Answer:

1/2x units

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers