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Hunter-Best [27]
3 years ago
5

Identify all sets of parallel and perpendicular lines in this image.

Mathematics
1 answer:
uysha [10]3 years ago
6 0

Answer:

All four options are correct.

Step-by-step explanation:

Option 1

m∠DPQ = m∠FQB = 90° [Corresponding angles theorem]

By the converse property of corresponding angles theorem,

CD║EF

Since, angle between AB and CD is 90°,

AB⊥CD

True

Option 2

Since, angles between AB and EF is 90°, both will be perpendicular.

AB ⊥ EF

AB ⊥ CD

True

Option 3

CD║EF and AB ⊥ EF

True

Option 4

CD║EF, AB ⊥ CD and AB ⊥ EF

True

Therefore, all options are correct.

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Discuss how to convert the standard form of the equation of a circle to the general form.
marishachu [46]

Explanation:

The standard form of the equation of a circle is ...

  (x -h)² +(y -k)² = r² . . . . . . <em>circle centered at (h, k) with radius r</em>

The general form of the equation of a circle will be ...

  Ax² +Bxy +Cy² +Dx +Ey +F = 0 . . . . . A = C for a circle

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The former is converted to the latter by eliminating parentheses, subtracting r² and collecting terms.

  x² +y² -2hx -2ky +(h² +k² -r²) = 0

This shows you that ...

  A = C = 1

  B = 0

  D = -2h

  E = -2k

  F = h² +k² -r²

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In general form, we like to have the coefficients be mutually prime integers and the leading coefficient be positive. That is not always possible, depending on the circle being represented.

5 0
3 years ago
What is the solution to the following equation?<br> x^2+2x+7=0
Olin [163]
This equation does not have any solution since determinant <0 i.e.,D=b^2-4ac =2^2-4×1×7 =4-28 =-24 i.e.,is less than 0
8 0
4 years ago
At a college, 7 out of 10 students work either a full-time or a part-time job in addition to their studies. If 4900 students wer
Rina8888 [55]

Answer:

1470 students do not have a full-time or part-time job

Step-by-step explanation:

We have a relationship between students who have a part-time job and those who do not. The ratio is 7 out of 10 students.

Then we use this relationship as a conversion factor.

If of 10 students, 7 of them have a job, then of 4900 students, how many of them have a job?

4900 * \frac{7}{10}=3430 students

Finally, those who do not have a job are:

4900- 3430 = 1470

3 0
3 years ago
PLEASE HELP LOTS OF POINTS
aleksandr82 [10.1K]
Plug in the to X value in
4 0
3 years ago
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Jack's father is 3 times older than jack. 5 years ago the sum of their ages was 34. How old is jack's father now?
Brilliant_brown [7]

Answer:

11 years old

Step-by-step explanation:

Jack's father is 3 times older than jack. ATQ, 5 years ago the sum of their ages was 34. So, the present age of Jack is 11 years.

(Hope this helps!! Btw, I am the first to answer.)

3 0
3 years ago
Read 2 more answers
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