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UkoKoshka [18]
2 years ago
11

A university wants to conduct a sample survey to determine the average number of students who earned a GPA higher than 3.5. Whic

h of the following survey methods is most likely to produce valid results?
A. The university surveys students who earned less than a 3.5 GPA.
B. The university surveys every other student who earned more than a 3.5 GPA.
C. The university surveys 600 randomly selected students who attend the university.
D. The university selects one department and surveys all of its students
Mathematics
1 answer:
tekilochka [14]2 years ago
3 0

Answer:

C. The university surveys 600 randomly selected students who attend the university.

Step-by-step explanation:

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Solve the simultaneous equations <br> 2x+3y=13<br> 4x-y=-2
kherson [118]
From eq1 ,
2x = 13-3y
x = 6.5-1.5y (eq 3)
sub eq 3 into eq2,
4(6.5-1.5y)-y=-2
26-6y-y=-2
-6y-y=-2-26
-7y=-28
7y=28
y=4 ( eq 4 )
sub eq4 into eq3 ,
x=6.5-1.5(4)
x=6.5-6
x=0.5


4 0
2 years ago
In order to solve the system of equations below, Harvey multiplies each equation by a constant to eliminate the x terms.
Karo-lina-s [1.5K]

Answer:

<u>The correct answer is A. 14 x + 6 y = 10. Negative 14 x minus 35 y = 77</u>

Step-by-step explanation:

Let's find out the constants to eliminate the x terms

7 x + 3 y = 5

2 x + 5 y = negative 11

Let's multiply the first equation by 2 and the second one by -7, this way:

2 * (7 x + 3 y = 5)

-7 * (2 x + 5 y = negative 11)

14x + 6y = 10

-14x - 35y = 77

<u>The correct answer is A. 14 x + 6 y = 10. Negative 14 x minus 35 y = 77</u>

5 0
3 years ago
Read 2 more answers
Help please. If correct I’ll mark as brainliest but I rlly need help.
kykrilka [37]

Answer:

46

Step-by-step explanation:

x +3x+5x - 54 = 360

x +3x+5x = 360 + 54

9x = 414

x= 46

4 0
3 years ago
What is the distance ab rounded to the nearest tenth when a=(-1,2) and b=(1,-2). ​
Tom [10]

Answer:

it gives you the formula, so all you have to do is plug in the coordinates

Step-by-step explanation:

7 0
3 years ago
Joshua orders some drinks for himself and some friends. He orders three cappuccinos, two iced teas, two cafe lattes, and an espr
Tju [1.3M]

Answer: 1.23

Explanation: hope this helps

8 0
3 years ago
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