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4 years ago

\You want to find out the favorite subjects of students at your school. Which plan describes a good sample?

2 answers:

8 0

I believe the correct answer would be A.

I assume this because compared to the other given options, this method would target the most diverse audience.

Leni [432]4 years ago

4 0

Sample A will be a good choice.

It has students from all classes and all subjects.

All other options don't guarantee that they have students from all possible subjects.

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Please solve these questions for me. i am having a difficult time understanding.

s2008m [1.1K]

Answer:

1) AD=BC(corresponding parts of congruent triangles)

2)The value of x and y are 65 ° and 77.5° respectively

Step-by-step explanation:

Given : AD||BC

AC bisects BD

So, AE=EC and BE=ED

We need to prove AD = BC

In ΔAED and ΔBEC

AE=EC (Given)

$\angle AED = \angel BEC$ ( Vertically opposite angles)

BE=ED (Given)

So, ΔAED ≅ ΔBEC (By SAS)

So, AD=BC(corresponding parts of congruent triangles)

Hence Proved

Refer the attached figure

$\angle ABC = 90^{\circ}$

In ΔDBC

BC=DC (Given)

So, $\angle CDB=\angle DBC$ (Opposite angles of equal sides are equal)

So, $\angle CDB=\angle DBC=x$

So, $\angle CDB+\angle DBC+\angle BCD = 180^{\circ}$ (Angle sum property)

x+x+50=180

2x+50=180

2x=130

x=65

So, $\angle CDB=\angle DBC=x = 65^{\circ}$

Now,

$\angle ABC = 90^{\circ}\\\angle ABC=\angle ABD+\angle DBC=\angle ABD+x=90$

So, $\angle ABD=90-x=90-65=25^{\circ}$

In ΔABD

AB = BD (Given)

So, $\angle BAD=\angle BDA$ (Opposite angles of equal sides are equal)

So, $\angle BAD=\angle BDA=y$

So, $\angle BAD+\angle BDA+\angle ABD = 180^{\circ}$ (Angle Sum property)

y+y+25=180

2y=180-25

2y=155

y=77.5

So, The value of x and y are 65 ° and 77.5° respectively

8 0

4 years ago

2x - 2y = 2 and 7 = -x

Elina [12.6K]

Answer:

y = -6

Step-by-step explanation:

6 0

4 years ago

Read 2 more answers

Please help!

Fittoniya [83]

1.) The answer is Letter A - the credit monitoring service alerts you when there is a change in your credit report.

2.) The answer is Letter D - Financial software can do all of the following except applying for loans.

3.) The answer is 34.78. Use the amount in 11/1 as your balance, then compute by deducting the checks (chk) and debit purchases and adding the deposits. Then get the difference.

Check Register:
Total = 397.45 - 50.32 - 16.32 + 190.67
Total = 521.48

Online Statement:
Total = 486.44 - 84.80 - 19.73 - 16.32 + 190.67
Total = 556.26

Difference = online - check register
Difference = 34.78

4.) The answer is 206.99. On 11/10 and 11/18, check and online have the same transactions (same date, same amount) which are 16.32 and 190.67. Add them together to get 206.99

5 0

3 years ago

Read 2 more answers

Leah ran 5/7 of a lap and Ryan ran 2/3 of a lap. Who ran farther and by how much?

Goryan [66]

Leah, she ran farther by 1/21

How you get the answer:

5/7
Multiply 7x3 to get the denominator and do the same to the numerator 5x3! Which is 15/21
To get 21 from 2/3 is to multiply 3x7 (denominator) and 2x7 (numerator) to get 14/21

15/21 > 14/21 so Leah ran farther by 1/21

7 0

3 years ago

Chase is comparing music subscription prices. A 12-month subscription with All Ears costs $91.80 and a 3-month subscription with

Tom [10]

Answer:

<h2> press play </h2>

Step-by-step explanation:

1 year 91 dollars or three month 13 dollars so press play would end up at 52 a year and all ears ends up at 91 a year

3 0

3 years ago