Math Is Fun Forum

I need help, I have the answers to every one of the questions but my teacher is asking for the work as well, My dad helped me with everything but he is out of town, so i have no idea how to do the work and I need it done soon, could someone please help show the work for the problems I have answered. I would greatly appreciate it

What is the area of the circle if the radius is:

1.  4
16*pi
 
2. SQRT(3)
3*pi
 
3. 7
49*pi
 
4. 6x
36 x^2 * pi
 
5. 10
100*pi
 
What is the radius if the area of the circle is:

6. 9(PI)
3
 
7. 4x^2(PI)
2x
 
8. 25(PI)
5
 
9. 81(PI)
9
 
10. 5(PI)
sqrt 5
 
11. (9/16)PI
3/4
 
12. 25y^2(PI)
5y
 
13. 16z^2(PI)
4z
 
14. t^2(PI)
t
 
15. t^2(PI)
1
 
 
What is the area of the sector if the radius is 6 and the degree measure is:

16. 26
2.68*pi = 9.523
 
17. 30
3*pi
 
18. 50
5*pi
 
19. 90
9*pi
 
20. 120
12*pi

Here is how i answers these questions. Apparently I got them wrong and I need help getting the right answers, Ive been stuck forever. Ill post what the teacher comments were on my work down below. And the link to the diagram.
1.     Robin knows that if he hits the white part of the target, he just slightly win, therefore not embarrassing John. What is the probability that Robin will hit the white part of the target (not the red and not the bull’s-eye)? Show your work.
3.14(2)2
= 12.56
3.14(6)2
= 113.04
3.14(9)2
= 254.34
2.     After Robin shoots into the white area, John knows he cannot win, so he decides to set his sites on second place. To get second place, he needs to hit either the white circle or the bull’s-eye. What is the probability that he can do that? Show your work.
3.14(2)2 =
12.56 / /
3.14(6)2 =
113.04 / /
3.14(9)2 =
254.34
The table is 30 inches wide and 180 inches long. The width of the 2 and 3 rectangles is 12 inches. The sides of the 4 rectangle are 15 inches and the top and bottom are 12 inches. The 1 rectangle is twice as wide as the 2
3. What are the dimensions of the 1 rectangle?
4. What are the measurements of one of the 5 rectangles?
5. You are playing shuffleboard in P.E. class. To score points, your disc must land in a box on the other side of the table and you are awarded the number of points that is in that box. What is the probability of scoring 1 point? 1 out of 5
6. What is the probability of scoring 2 points? 1 out of 5
7. What is the probability of scoring 3 points?1 out of 5
8. What is the probability of scoring 4 point?1 out of 5
9. What is the probability of scoring 5 point?1 out of 5
10. What is the probability of scoring at all (any number of points)? 5 out of 5
Teacher Comments on my work :
1-2   you need to find the PROBABILITY... take the specific area asked for and divide by area of entire target!
#3-4   where are these?  Use the info given to LABEL the diagram
$5-10   find the area of each rectangle and then use those too find probability!
Link to diagram :removed by administrator

I have posted my homework down below with the answers. The teachers comment are at the bottom and I will also post a link to the diagram down below. Please help I have been stuck for a couple days and it has to be done asap.
0QznckB.gif

1. Refer to the image at the right. If angle 1 is 30 degrees, and angle 5 is 70 degrees, are the two lines
parallel?
answer : No it is not parallel
2. Refer to the image at right. If angle 2 is 30 degrees and angle 4 is 60 degrees, are the lines parallel?
answer : No it is not parallel
3.  Refer to the image at right. If angle 2 and angle 6 are both 70 degrees, are the lines parallel?
answer : No it is not parallel

Teacher comments :

#1, 2, 3    you need to state the angle relationship.... corresponding, alternate interior, same side interior.. etc.

Here is my homework I have been stuck for a couple days and need help. I listed below the teachers comments along with the diagram. Thank you <3

1.     Robin knows that if he hits the white part of the target, he just slightly win, therefore not embarrassing John. What is the probability that Robin will hit the white part of the target (not the red and not the bull’s-eye)? Show your work.

3.14(2)2

= 12.56

3.14(6)2

= 113.04

3.14(9)2

= 254.34

2.     After Robin shoots into the white area, John knows he cannot win, so he decides to set his sites on second place. To get second place, he needs to hit either the white circle or the bull’s-eye. What is the probability that he can do that? Show your work.

3.14(2)2 =

12.56 / /

3.14(6)2 =

113.04 / /

3.14(9)2 =

254.34

Problem B. The following is a diagram of a shuffleboard table

The table is 30 inches wide and 180 inches long. The width of the 2 and 3 rectangles is 12 inches. The sides of the 4 rectangle are 15 inches and the top and bottom are 12 inches. The 1 rectangle is twice as wide as the 2

3. What are the dimensions of the 1 rectangle?

4. What are the measurements of one of the 5 rectangles?

5. You are playing shuffleboard in P.E. class. To score points, your disc must land in a box on the other side of the table and you are awarded the number of points that is in that box. What is the probability of scoring 1 point? 1 out of 5

6. What is the probability of scoring 2 points? 1 out of 5

7. What is the probability of scoring 3 points?1 out of 5

8. What is the probability of scoring 4 point?1 out of 5

9. What is the probability of scoring 5 point?1 out of 5

10. What is the probability of scoring at all (any number of points)? 5 out of 5

Teacher Comments :

#1-2   you need to find the PROBABILITY... take the specific area asked for and divide by area of entire target!

#3-4   where are these?  Use the info given to LABEL the diagram

$5-10   find the area of each rectangle and then use those too find probability!

I am going to list my answers to my geometry homework. The ones I have already answered I need to take the sqrt if there are any perfect squares. The three i left blank I did not know how to answer. I will put the teachers comment down below. Help please I've been stuck for awhile and it needs to be done fast.
11. √108

12. √576

13. question : a=7 and c=SQRT 85

(don't know the answer)

14. √24

15. question :  a=1 and c=SQRT 2

(don't know the answer)

16. √44

17. √784

18. √306

19. question :  a=6 and c=6(SQRT 2)

(don't know the answer)

20. √23

teacher comments :

The ones you have completed look good... just make sure that if the numbers you get are PERFECT SQUARES... go ahead and take the SQRT.

For #13, 15 and 19... see my previous feedback!!!

previous feedback :

Make sure that you always STATE the final answer... if you end up wth c2 = 4... then c=2  which is the SQRT of 4.  Since 4 is a perfect square, you can give it's actual sqrt.  IF you were to get something like c2 = 5... your answer would just be c=√5.  Since 5 is NOT a perfect square, just leave the answer as a sqrt

Also... make sure that you understand when you SQUARE a SQRT... the operations CANCEL each other out and leave ONLY the number from under the radical!

Ex... √5 2 = √5 * √5 = 5

ex 2.... (2√5)2 = 2*2*√5*√5 = 4*5 = 20

Here is how i answers these questions. Apparently I got them wrong and I need help getting the right answers, Ive been stuck forever. Ill post what the teacher comments were on my work down below. And the link to the diagram.

1.     Robin knows that if he hits the white part of the target, he just slightly win, therefore not embarrassing John. What is the probability that Robin will hit the white part of the target (not the red and not the bull’s-eye)? Show your work.
3.14(2)2
= 12.56
3.14(6)2
= 113.04
3.14(9)2
= 254.34

2.     After Robin shoots into the white area, John knows he cannot win, so he decides to set his sites on second place. To get second place, he needs to hit either the white circle or the bull’s-eye. What is the probability that he can do that? Show your work.
3.14(2)2 =
12.56 / /
3.14(6)2 =
113.04 / /
3.14(9)2 =
254.34

The table is 30 inches wide and 180 inches long. The width of the 2 and 3 rectangles is 12 inches. The sides of the 4 rectangle are 15 inches and the top and bottom are 12 inches. The 1 rectangle is twice as wide as the 2

3. What are the dimensions of the 1 rectangle?
4. What are the measurements of one of the 5 rectangles?

5. You are playing shuffleboard in P.E. class. To score points, your disc must land in a box on the other side of the table and you are awarded the number of points that is in that box. What is the probability of scoring 1 point? 1 out of 5
6. What is the probability of scoring 2 points? 1 out of 5
7. What is the probability of scoring 3 points?1 out of 5
8. What is the probability of scoring 4 point?1 out of 5
9. What is the probability of scoring 5 point?1 out of 5
10. What is the probability of scoring at all (any number of points)? 5 out of 5

Teacher Comments on my work :
1-2   you need to find the PROBABILITY... take the specific area asked for and divide by area of entire target!
#3-4   where are these?  Use the info given to LABEL the diagram
$5-10   find the area of each rectangle and then use those too find probability!

Link to diagram : link removed by administrator

These 6 questions I completed but I got wrong. Could someone please help me get the correct answers? Ill post what my teacher had to comment about my answers down below.

1. Refer to the image at the right. If angle 1 is 30 degrees, and angle 5 is 70 degrees, are the two lines
parallel? Explain.

1 should = 5 if they are parallel and had a transversel through them.

2. Refer to the image at right. If angle 2 is 30 degrees and angle 4 is 60 degrees, are the lines parallel?
Explain.

co-interior angles are supplementary and thus 6+4 should = 180. 30 and 60 obviously are
complementary, not supplementary.

3. Refer to the image at right. If angle 2 and angle 6 are both 70 degrees, are the lines parallel? Explain.
I have no clue what the answer is for this one.

5. What is the measure of the inner angle of a regular hexagon? Show your work (and be sure to explain
anything you deem necessary to make sure your work is clear.)

A. A hexagon has 6 sides.
180 x 6 = 1080
The sum of the angles of deviation is 360
SO
1080 360 = 720
The final answer is 720

6. What is the measure of the inner angle of a regular decagon? Show your work (and be sure to explain
anything you deem necessary to make sure your work is clear.)

A. A decagon has 10 sides.
180 x 10 = 1800
The sum of the angles of deviation is 360
SO
1800 360 = 1440

7. Polygon A has sides of 4, 3, 5, and 3. Polygon B has sides of 8, 6, 10, and 6. What are the two possible
scale factors here? Explain.

To get my scale factor, I will need to divide the two polygons. This is how I
will do it along with the answers for each number:
4 / 8 = 1/2
3 / 6 = 1/2
5 / 10 = 1/2
3 / 6 = 1/2
So now we know the scale factor is 1:2.

10. A right triangle has a 90 degree angle, and an angle x. What will the measure of the third angle be?
I believe the answer for this would be 90 x.

Teachers comments on my work :
#1-3    Now state whether or not the lines are parallel
#5-6    What is the measure of ONE angle?
#7    and what is the OTHER possible scale factor for these measurements?
#10    90x means 90*x...  that is incorrect... is there another relationship between 90 and x?

THE LINK TO THE DIAGRAM IS
https://postimg.org/image/7zi8v9g2hn/