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butalik [34]
2 years ago
14

The track-and-field coach wants to know whether the students in the entire school prefer track races or field events. The coach

draws a random sample from the following groups:
All students in each grade
All teachers in the school
All boys in each grade in the school
All students on the track-and-field team
Which group best represents the population she should take a random sample from to get the best results for her survey?
Mathematics
1 answer:
strojnjashka [21]2 years ago
8 0

All students in each grade

audience: <u>students</u> - counts for both boys and girls.

option (B) for teachers is irrevelant.

option (C) doesn't include girls.

option (D) doesn't include the entire school

Hence, option A is correct.

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The temperature was 54° at 7:00 a.M. At 3:00 p.M. On the same day, the temperature was 82°. What is the rate of change in temper
frutty [35]

Answer:

3.5°/hour

Step-by-step explanation:

Rate of change of temperature=change in temperature/Change in time

Change in temperature

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Change in time=3:00pm - 7:00am

=8:00 hours

Rate of change of temperature=28°/8 hours

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7 0
3 years ago
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What is the product?
ZanzabumX [31]
To get the answer to this equation you first cancel out the 6! ;)

(x^2-1)(6x-1) / (x+1)

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Then use the difference of squares!

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6 0
3 years ago
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How are rigid transformations used to justify the sas congruence theorem?
scZoUnD [109]

Answer:Rigid transformations preserve segment lengths and angle measures.

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Step-by-step explanation:

Sample Response: Rigid transformations preserve segment lengths and angle measures. If you can find a rigid transformation, or a combination of rigid transformations, to map one triangle onto the other, then the triangles are congruent. To prove SAS, we started with two distinct triangles that had a pair of congruent corresponding sides and a congruent corresponding included angle. Then we performed a translation, followed by a rotation, followed by a reflection, to map one triangle onto the other, proving the SAS congruence theorem.

6 0
3 years ago
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White raven [17]

Answer:

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Step-by-step explanation:

-8w+(-4z)+2+6w+9z-7

Step 1: Group the terms together

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Step 2: Add like terms

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Thats as simplified as it can get :)

5 0
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