Answer:
Option A.
Step-by-step explanation:
We know that we have:
220 students in grade 6.
170 students in grade 7.
100 students in grade 8.
Now we want to make a sample, to have the sample in the most representative way, so we should select the same percentage of students for each grade.
Let's analyze option A (this is the one that makes sense because has the larger number for 6th grade, then 7th grade and last for 8th grade)
Here we need to look at the quotient between the number of students selected for each grade, and the total number of students in the grade:
for 6th grade:
45/220 = 0.2
for 7th grade:
35/170 = 0.21
for 8th grade:
20/100 = 0.2
In the 3 cases we can see that we have almost the same ratio, which means that for the sample we selected around the 20% of each grade.
This is the most representative way of sampling in this case, then the correct option is A.
Piper signed up for a streaming music service where there's a fixed cost for monthly
membership and a cost per song downloaded. Her total cost per month is given by
the equation c =
0.5x + 2.99, where x represents the number of songs she
downloads and c represents the total cost, in dollars and cents. What could the
number 0.5 represent in the equation?
Answer:
I think the answer is 0.5 rate/number of songs she downloads. Sorry if I am wrong
Step-by-step explanation:
0.5x means that 0.5 is our rate and the question states that x represents the number of songs she downloads
I was in the hospital and missed a whole lesson in math HELP ME PLZZZ
Answer:
1.5 inches
Step-by-step explanation:
Area of a square:
A = a²
Given:
A = 2.25
Find a:
A = a²
2.25 = a²
[tex]\sqrt{a^2} =\sqrt{2.25}[/tex]
a = 1.5
No Explanation Please Don't Answer
Answer:
A) [tex]\frac{1}{2}(9+15)w[/tex]
Step-by-step explanation:
Area of a trapezoid is [tex]\frac{1}{2}(base1+base2) *h[/tex]
[tex]A=\frac{1}{2}(9+15)*w[/tex]
in a race, a man covers 5km in 20 min. how much distance will he cover in 100 min
Step-by-step explanation:
men is covers by 25km in 100min
PLSSSSSSSSSS HHHELP MEE ITS A TESTTT
Answer:
The answer is C
Step-by-step explanation:
Matt and Mark went to El Rodeo to have some dinner. Matt ordered 3 tacos and 2 enchiladas, which cost him $4.93. Mark ordered 2 tacos and 4 enchiladas, which cost him $6.38. What is the cost of one taco and what is the cost of one enchilada?
Answer:
The cost of one taco is $0.87 and the cost of one enchilada is $1.16
Step-by-step explanation:
Let the cost of tacos be X
and cost of enchiladas be y
So, by using given data, we have following equations
3X + 2Y = 4.93 (1)
2X + 4Y = 6.38 (2)
So, first multiply 1st equation by 2 and 2nd equation by 3, then subtracting 1st equation by 2nd.
= 2 × ( 3X + 2Y = 4.93) (1)
= 3 × (2X + 4Y = 6.38) (2)
= - (6X + 4Y = 9.86) (1)
= 6X + 12y = 19.14 (2)
= 8Y = 9.28
Y = 9.28 ÷ 8 = 1.16
By putting the value of Y in equation 1, we get
3X + 2(1.16) = 4.93
3X + 2.32 = 4.93
X = 2.61 ÷ 3 = 0.87
Hence, the cost of one taco is $0.87 and the cost of one enchilada is $1.16.
Find the area of a regular decagon with a perimeter of 60 ft.
Answer:
Area of a regular decagon with a perimeter of 60 ft. = 277 squared ft
Step-by-step explanation:
Decagon has 10 sides So 60/10 = 6 (each side = 6ft )
The sum of the interior angles of a decagon is 1 440 degrees.
There are 10 equal isosceles triangles of base angles 72 degrees in a decagon
Each isosceles triangle can subdivided into 2 right-angled triangles with height h and base length = (6/2) = 3 cm and base angle 72 degrees.
Height of right-angled triangle h = 3 tan 72 ft.
Area of 1 right-angled triangle = (1/2)(3)(3 tan 72) = 13.85 squared ft
Area of decagon = 20 right-angled triangles = 277 squared ft
Calculate each value for ⊙P. Use 3.14 for π and round to the nearest tenth.
mJKL = 230
area of shaded sector =
area of unshaded sector =
Answer:
Area of the unshaded sector = 113.4 sq units
Area of the shaded sector = 200.6 sq units
Step-by-step explanation:
First let us calculate the area of the circle
Area of the circle = πr²
radius r = 10units
Area of the circle = π(10)²
Area of the circle = π(100)
Area of the circle = 3.14(100)
Area of the circle = 314 sq. units
Area of a sector = theta/360 * πr²
Area of the unshaded sector = 130/360 * 314
Area of the unshaded sector = 13/36 * 314
Area of the unshaded sector = 113.389 sq units
Area of the unshaded sector = 113.4 sq units
Area of the shaded sector = Area of circle - Area of the unshaded sector
Area of the shaded sector = 314 - 113.89
Area of the shaded sector = 200.6sq. units
A baker used 4 cups of flour to make 5
batches of cookies. He used _?_ of a
cup of flour to make lbatch of
cookies.
Answer:0.84
Step-by-step explanation:
Here,5 cups = 6 batches divided both side by 65/6 cups = 1 batches1 batch = 0.84 cupThus, 0.84 cups is required to make 1 batch of cookies.
pls help me i am stuck on this question
Answer:
a. 25*17.5=437.5
b. 488
Step-by-step explanation:
a. If we put the two figures together they equal a square. so we do 25*17.5=437.5 if I'm wrong then try 875! Hope this helps
b. Lets add the rectangle and triangle together!!
32*10 +(8*32)/2
=320+256/2
=320+128
=488
I don't have a question just look at the picture
Answer:
I looked at the picture and it looks nice
Step-by-step explanation:
I dont know the answer?
(BRAINLYEST) Apply the markdown and find the sale price. Round to two decimal places when necessary.
A soft blanket originally cost $18.99. It is marked down 20%. What is the new price, not including sales tax?
Answer:
Got to quizlet it has the answer.
Step-by-step explanation:
Hope it helps
find the volume of a cone with a height 7 and radius 7
Answer:
359.19
Step-by-step explanation:
Using the formula V=(πr^2) * h/3 and plugging in the given values we get 359.19.
I estimated pi at about 3.14
Need help ASAP please
Answer:
because the length is 4 feet more than the width
=> the length is x + 4 (feet)
because the base has an area of 21 square feet
=> x(x + 4) = 21
<=> x² + 4x = 21
PLSS HELP THE TEACHER IS ASKING FOR MY ANSWERS CUZ I WAS SUPPOSED TO DO IT AND I NEVER WAS PREPARED PLSSS HELP IM NEXT
How many 4 1/2 are in 6 3/4
Which quantity is proportional to 35⁄80?
Answer:
7/16
Step-by-step explanation:
Answer:
7/16
Step-by-step explanation:
Simplify
Aaaaaaaaaaaaaaa a aaaaaaaaaaaaaaaaaaa khan academy
Hi again
Answer:
7t=105
Mu walked 15 laps
`$7 * l = $105`
`l = $105 : $7`
`l = 15 (laps)`
Question 8: A bicycle shop sold 8 tires for $298.75. What was the cost of 1 tire to the nearest hundredth?
Answer:
Unitary cost= $37.34 = $37
Step-by-step explanation:
Giving the following information:
Number of tires= 8
Total cost= $298.75
To calculate the unitary value of each tire, we need to use the following formula:
Unitary cost= total cost / number of tires
Unitary cost= 298.75 / 8
Unitary cost= $37.34 = $37
946 x 1/3
Please help!!
Answer:
Sure! Your answer is about 315.33.
Step-by-step explanation:
If you want to figure this out by yourself, just open a calculator and do 946 * 0.33. You could also find this by dividing 946 by 3.
Please like and mark brainliest!
Hope it helps!
What is the slope-intercept form of the equation of the line with a slope of 1/4 that passes through (-4, -8)
Answer:
y=1/4x-7
Step-by-step explanation:
y-y1=m(x-x1)
y-(-8)=1/4(x-(-4))
y+8=1/4(x+4)
y=1/4x+4/4-8
y=1/4x+1-8
y=1/4x-7
gina drew three small congruent circles beside one large circle. based on the diagram which answer choice is the closest to the area of the large circle?
Answer:28.3 cm2
Step-by-step explanation:
A boat is heading due north at 15 mph. The current is flowing southeast at 5 mph. Find the actual bearing and speed of the ship
Answer:
3 Mph
Step-by-step explanation:
Have a nice day!
Find the sum of the first 48 terms of the following series, to the nearest integer.
6, 9,12,...
6,9,12
Answer:
3,672
Step-by-step explanation:
Given the sequence 6, 9, 12...
The sequence is an arithmetic sequence
first term a = 6
common difference d = 9 - 6 = 12 - 9 = 3
number of terms n = 48
Sn = n/2[2a+(n-1)d]
Substitute the given values
S48 = 48/2[2(6)+(48-1)(3)]
S48 = 24(12+(3*47))
S48 = 24(12+141)
S48 = 24(153)
S48 = 3,672
Hence the sum of the first 48terms is 3,672
Can someone please help me for 4a. i know that answer and the answer is 15d+20 but what is the answer for the second part which is 4b.??
Answer:
I answered Part A here in your last question
https://brainly.com/question/23124193
B. No, you will not get a different amount because their expressions were the same, so they make the same ammount of money which is 1.3333 dollars per walk.
Step-by-step explanation:
If you have any quesitions feel free to ask in the comments
prove this that the lll
Answer:
hmm pray you will fine the answer.
Step-by-step explanation:
dunno can you please say details
Find the volume of the prism. Round to the nearest tenth if necessary
Answer:
63cm³
Step-by-step explanation:
The shape above is a rectangular prism
The formula for a rectangular prism is given as:
= Length × Width × Height
Length = 3cm
Width = 3cm
Height = 7cm
= 3cm × 3cm × 7cm
= 63 cm³
The volume of the rectangular prism = 63cm³
Which of the following is a solution to the system of
equations?
4 + y = -x
y = 2x - 10
Answer:
x=3, y= -6
Step-by-step explanation:
make 4+y= -x as equation (1) and make y=2x-10 as equation (2, then you must find a third equation either from equation (1)or (2). If you choose to find equation (3) from (2) it will be y=2x-10 , then substitute equation (3) from (1) because you can't choose (2) , then it will be 4+(2x-10)= -x
the answer will be x =2
substitute x from equation (3)
y=2x-10
y=2 (2)-10
y= -6
Please help me with this
Answer:
55.56 Units
Step-by-step explanation:
6+10+13+6= 35.
PLEASE HELP PLEASE HELP
NO EXPLANATION
Answer:
A hope it helped im a junior in college i dont take science
Step-by-step explanation: