MATHEMATICS HIGH SCHOOL

Mr. Hou put students names in a hat and selected file names without looking. What type of sample did he preform?A) Simple random sample
B) Systematic random sample
C) Voluntary response sample
D) Convenience sample

Answers

Answer 1
Answer:

Step-by-step explanation:

The answer is A. The answer is A because  the teacher put names in a hat without looking. That narrows down the answer to A and B. Since he didn't do it in a special scientific way the answer is A

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Answers

Answer:

131.086

Step-by-step explanation:

If bc = 8.3 cd = 6.7 and ad = 11.6 find ab to the nearest tenth

Answers

This is going to be tricky to explain over text, so try to bear with me :)

You have the information given above. Let's start with just ad = 11.6 for now. since these are variables, it can also be understood be understood as a times d= 11.6. 
Knowing this, we can figure out that d = 11.6/a, when you divide both sides by a.

You now have d, so plug (11.6/a) into cd=6.7. You have to do the same thing you did last time, except this time you are aiming to get c by itself. So, multiply both sides by a/11.6 and you get c = (6.7a)/ 11.6. 

Guess what, you know c now! so you put (6.7a)/11.6 in for c in the equation given to you earlier, bc =8.3. The math gets a bit messy here, but you basically solve for b here, which, when you crunch the numbers down, ends up being ~14.3705 divided by a. You are looking for ab, so just multiply both sides by a, and round to the nearest tenth so that you have ab= 14.4

K=A+32 solve for Variable A

Answers

K=A+32\n\nA+32=K\ \ \ \ |subtract\ 32\ from\ both\ sides\n\n\boxed{A=K-32}
K=A+32
A=K-32
.........

What is 7.3519 to 1 decimal place?

Answers

Well, the first decimal place is the tenth place, so if you do NOT want to round, then your answer would be 7.3.
If you DO want to round, your answer would be 7.4 because there is a five in the hundredths place.

I hope this helped you!
7.3519\approx7.4

Which of the following ratios is equivalent to 49:35?

Answers


The best way to find it is to reduce each ratio you work with to its
lowest terms,and see which ones are equal. To reduce a ratio to its
lowest terms, divide each number by their greatest common factor.

First, the one that you're trying to match:  49:35 .
The greatest common factor of 49 and 35 is 7 .
Divide each number by 7 . . .  7:5 . . . that's what you have to match.

7:4
Their greatest common factor is ' 1 '.
No help at all, and this one is not it.

14:25
Again, their greatest common factor is '1 '.
No help at all, and this one is not it.

21:15
Their greatest common factor is ' 3 '.
Divide both numbers by 3 . . . 7:5 .
That's it !
49=7*7
35=7*5
so 49:35=7*7:7*5=7:5
7:4 is not 7:5
14:25 also isn't 7:5
21:15=3*7:3*5=7:5
the answer is 21:15

A data set consists of the following data points:(2, 12), (3, 7), (5, 4)

The slope of the best-fit line is -2.5. Find the y-intercept of this line.

A. 14
B. 13
C. 15
D. 16

Answers

Since the slope of the line is already given, by plotting the three points and drawing a best fit line using the given slope and extending the line to hit the x-axis, the y-intercept can be determined. Line-fitting tools can also be used; common scientific calculators have that feature.
So, the answer is D. 16
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