MATHEMATICS MIDDLE SCHOOL

In determining the quality of the hats in a used-hat bin, a grandmother selects the first four hats she can reach. Which sampling technique did she use?Select one:
a. systematic sampling
b. convenience sampling
c. stratified random sampling
d. voluntary response sampling

Answers

Answer 1
Answer: b convenience sampling because if it looks bad then she should throw it away but if it looks good then she should keep it 

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Is 7 x (6 x t) equivalent to (7 x 6) x t
What is -7/9 in a decimal
Would you measure the length of a bench in centimeters or in meters
I really need this ASAP! what is 14 2/7 as a fraction
Help me with this question someone.

Is 1.625 greater than, less than, or equal to 1.7

Answers

1.625 is less than 1.7 
If the 5 were to round the 2 it would be 1.63 and the 3 cannot be rounded up so if we looked at this this way: 1.6  and 1.7 we know that 1.7 would be greater. 
I believe the answer is less than

The perimeter of a rectangular picture frame is 30 inches. The length of the frame is three less than twice the width. What are the dimensions of the frame?

Answers

The dimensions are length equal to 9 inches and width equal to 6 inches.

It is given that length of rectangularframe is three less than twice the width and its perimeter is 30 inches.

We have to find out the dimensions of the frame.

What is the perimeter of a rectangle ?

The perimeter of a rectangle is 2 ( b + l ) , where b is width and l is the length of the rectangle.

As per the question ;

Length of rectangularframe is three less than twice the width.

Let's assume width be x.

So ;

Length will be ;

= 2x - 3

We know that ;

Perimeter of a rectangle is given by ;

P = 2 ( b + l )

⇒ 30 = 2 ( x + 2x - 3 )

⇒ 30 = 2 × ( 3x - 3 )

⇒ 30 = 6x - 6

⇒ 6x = 36

⇒ x = 6 inches

So ;

width will be 6 inches and length will be ;

l = 2x - 3

l = 2 × 6 - 3

l = 12 - 3

length = 9 inches

Thus , the dimensions are length equal to 9 inches and width equal to 6 inches.

To learn more about algebra click here ;

https://brainly.in/question/6577457

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Perimeter-30 in
Length-2x-3
Width-x

P=2[l+w]
30=2[2x-3+x]
30=2[3x-3]
30=6x-6
Add 6 to both sides
36=6x
Divide both sides by 6
x=6

Length:9
Width:6

What is the value of 8 in 8,644.58 plz
thx if anyone helps

Answers

the first 8 in 8,644.58 is ten thousand and the second 8 is hundreth!
The answer is 8,000
I think... Lol

One-third of the results of three times a number that is increased by 12.

Answers

1/3 (3x+12)
1/3×3x+1/3×12
x+4

Larissa asked 40 students to name their favorite food. 10 students said their favorite food was pizza. What percent of the students Larissa surveyed said their favorite food was pizza?

Answers

25% percent 
10/40 is also 1/4 simplified.
1/4 as a fraction is 25%, 25 times 4 equals 100.

OR

Use 1/4, but divide 1 by 4(fraction is also division)
You get 0.25
Turn  this into a percent by moving the decimal point to the right 2 times. 
The answer is 25%
4% i think im not completely sure but i did alot of work and i pretty sure thats correct

Simplify the expression 2x+3(x-2)-3(x-6)

A. 2x + 12
B. 2x - 8
C. 8x - 24
D. 2x - 24

Answers

2x+3(x-2)-3(x-6) \n \n 2x + 3x - 6 - 3x + 18 \ / \ expand \n \n (2x + 3x - 3x) - 6 + 18 \ / \ gather \ the \ like \ terms \n \n 2x - 6 + 18 \ / \ simplify \n \n 2x + 12 \ / \ simplify \n \n

The final result is A) 2x + 12.
2x+3(x-2)-3(x-6)You would first distribute.So:2x+3x-6-3x+18Then you would combine like terms, like so:2x+3x-3x= 2x-6+18= 12So it'd be:2x + 12Which is answer choice AHOPE THIS HELPS!!(:
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