Answer:
ratio of boys to girls= 4:7
number of girls=21
now,
[tex] \frac{boys}{girls} \times \frac{no.of \: boys}{no.of \: girs} [/tex]
[tex] \frac{4}{7} \times \frac{boys}{21} [/tex]
[tex]4 \times 21 = 7boys\: \\ \: ({cross multiplication})[/tex]
[tex]84 = 7boys[/tex]
[tex] \frac{84}{7 \: } = boys \: \: \: (dividing \: 84 \: by \: 7)[/tex]
[tex]12 = boys[/tex]
[tex]no.of \: boys = 12[/tex]
68=u-11
need help lololo
Answer:
79
Step-by-step explanation:
79-11=68
i hope this helps
Answer:
U=79
68+11=79
79=U
U=79
A college administrator wants to survey 250 students that attend her college to see if students are satisfied with the course offerings. Match the strategies to their corresponding sampling techniques.
a. 12345 The administrator gets the complete list of students at the college and then uses a computer to randomly select 250 students. She then surveys these 250 students.
b. -12345 The administrator gets the complete list of students at the college and surveys every 50th students on the list.
c. -12345The administrator researches the ethnic make-up of the college and makes sure that the proportion of each ethnic group represented in the sample is the same as the corresponding proportion of that ethnic group at the college.
d. -12345 The administrator goes into 9 classes from many subject areas and asks all the students in each of these 9 classes.
e. -12345 The administrator stands by the front door of the admissions department and asks the first 250 students who walk in.
1. Stratified Sampling
2. Systematic Sampling
3. Simple Random Sampling
4. Cluster Sampling
5. Convenience Sampling
Answer:
A3 b2 c1 d4 e5 that's the answer
Using sampling techniques, the matched pairs are:
a - 3b - 2c - 1d - 4e - 5------------------------
Samples techniques are:
Convenient: The easiest way to sample, according to convenience, for example, all people at a place.Random: A number of options from a set of all, taken randomly.Systematic: One option is sampled from every k elements.Cluster: Division into groups, and all elements of each group are surveyed.Stratified: Division into groups, and a proportion of each group is surveyed.------------------------
Item a:
Students are randomly chosen, thus, simple random sampling.a matches 3.------------------------
Item b:
Every kth, in this case, every 50th student, thus, systematic sampling.b matches 2.------------------------
Item c:
Divided into groups, a proportion of each group is sampled. Thus, stratified sampling.c matches 1.------------------------
Item d:
Divided into groups(classes), all elements of each group is sampled, thus, cluster sampling.d matches 4.------------------------
Item e:
Number of people at a place, thus, convenience sampling.e matches 5.A similar problem is given at https://brainly.com/question/24188753
Mrs. Gonzales spent $58 on groceries.
She had $13 left after paying for the food.
How much money did she have before she
bought the groceries?
Answer:
71
Step-by-step explanation:
13 plus 58 equals 71
Answer
71
Step-by-step explanation:
58 plus 13 is 71
Зm — 2n = 12
can someone help me on khan
Answer:
[tex]n=3m/2-6[/tex]
Step-by-step explanation:
solving for m
3m-2n=12
+2n +2n
3m=2n+12 (divide 3 by all numbers)
[tex]m=2n/3+4[/tex]
solving for n
3m-2n=12
-3m -3m
-2n=-3m+12 (divide all numbers by -2)
[tex]n=3m/2-6[/tex]
What equation shows the inverse variation represented in the table?
Plz help with this geometry !
Answer:
∠CBD = 50°
Step-by-step explanation:
Step 1:
x + 130° = 180° Supplementary ∠'s
Step 2:
x = 180° - 130° Subtract 130° on both sides
Answer:
∠CBD = 50°
Hope This Helps :)
Calculate the speed of a wave with a frequency of 2 Hz, amplitude of 3m, and a wavelength of 10m
The speed of a wave is the product of the wavelength and its frequency.
The speed of the wave is 20m/s
Given
[tex]\lambda = 10m[/tex] --- the wave length
[tex]f =2Hz[/tex] --- the frequency
[tex]A = 3m[/tex] --- the amplitude
The speed of wave (v) is calculated as follows:
[tex]v =f\lambda[/tex]
Substitute values for f and [tex]\ambda[/tex][tex]\lambda[/tex]
[tex]v = 2Hz \times 10m[/tex]
[tex]v = 20ms^{-1}[/tex]
Hence, the speed of the wave is 20m/s
Read more about waves at:
https://brainly.com/question/10715783
You spin a spinner that is equally divided into 9 parts. 3 parts are pink,
3 parts are speckled, and 3 parts are black.
What is the probability of the spinner stopping at a speckled section?
Write your answer as a percent rounded to the nearest whole number.
Answer:
33%
Step-by-step explanation:
9 parts divided by 3 categories is 3. 100 divided by 3 is 33.3%, which is 33% when rounded to the nearest whole number
I need to get rid of the parenthesis and match like terms of
-5(2x-3y)+2(x+2y)
Answer:
-8x+19y
Step-by-step explanation:
Answer:
-8x + 19y
Step-by-step explanation:
distribute the -5
-10x + 15y + 2(x + 2y)
distribute the 2
-10x +15y + 2x + 4y
arange the terms
-10x + 2x + 15y + 4y
combine
-8x + 19y
Find the value of X?
how many cups of red paint would there if there was 1 cup of white paint
Answer:
Um.....there isnt enough information for anybody to really figure this out.
Step-by-step explanation:
two buses leave the terminal at 12 noon. bus #86 takes 45 minutes to complete its route. bus #79 takes 60 minutes when is the next time the two buses will arrive together at the terminal
Answer:
3 hours from noon, or 3 pm.
Step-by-step explanation:
As of 12 noon, the frequencies are 45 and 60 minutes.
To find out when they leave at the same time again, we need the LCM (least common multiple) of the two frequencies, i.e.
LCM (45, 60) = common time from {45,90,135,180,225,270,315,360....} and{60,120,180,240,300,360,...}
We see that they leave at the same time again at 180 and 360, ... minutes. Since 180 minutes is the least common multiple, 180 is the next time they leave together again, or 3 hours after noon, i.e. 3pm.
Happy New Year, ... en quelques minutes! :)
Answer:
3 PM
Step-by-step explanation:
{Picture attached} I WILL MARK BRAINLIEST TO THE ANSWER WITH THE GOOD EXPLANATION :)
Help for brainliest
(will mark as brainliest)
Describe the process of graphing a quadratic equation without using graphing technology. How many solutions can a quadratic equation have and why does it vary? How would the corresponding graphs look like?
Find the x and y-intercepts of the equation. Then calculate the points at constant intervals and plot and connect those points on a makeshift graph. A quadratic equation can have 2 solutions, 1 solution, or none. The corresponding graphs(if two solutions) would most probably cross over the x-axis twice.
Hope this helps.
pls help right answer will get brainlest!!
Answer:
2 2/5
Step-by-step explanation:
Keep, Change, Flip!!!
3/4 x 16/5
Use The Butterfly Method!!!
3/1 x 4/5
Multiply!!!
12/5
Simplify!!!
motorcycle cover 210 kilometre distance with 5 l of petrol how many kilometre does it cover with 8 litre of petrol? how much petrol is needed to cover 588 kilometre
Answer:
A: 336 km
B: 14 L
Step-by-step explanation:
Use a proportion
210 km / 5 L = x / 8L Cross multiply
8*210 = 5 x
1680 = 5x
x = 1680 / 5
x = 336 km
===============
210 /5 = 588/x Cross multiply
210x = 588 * 5
210x = 2940 Divide by 210
x = 2940/210
x = 14 L
a triangle has a base of 16 inches and a height of 1/8 inches what is the area
Answer:
the area is 2
Step-by-step explanation:
The area of the triangle will be 1 inch².
What is a triangle?
A triangle is a three-edged polygon with three vertices. It is a fundamental form in geometry. The sum of all the angle of a triangle is always equal to 180°.
Given that the height of the triangle is 1/8 inches and the base of the triangle is 16 inches. Therefore, the area of the triangle will be,
Area of the triangle = 0.5 × Height × Base
= 0.5 × (1/8) inches × 16 inches
= 1 inch²
Hence, the area of the triangle will be 1 inch².
Learn more about Triangle here:
https://brainly.com/question/2773823
#SPJ5
Find the missing angle value A for triangle ABC if B=45 and C=45 degrees.
Answer:
A would be 90
Step-by-step explanation:
Triangles always calculate to 180 degrees so with the 45+45 being 90 you would subtract that to 180 and it'd give you 90.
Regina went out for breakfast. The bill came to $7.12. If Regina has a discount coupon for 20%, how much will be taken off the bill
A student bought 15 stamps, some were 50 yen stamps and some were 80 yen stamps. She paid 960 yen.
Answer:
I think it's a..... I think it's a carrot
Select each equation that the number 103 makes true.
A. 6.01 x __ = 601
B. 0.305 x __ = 305
C. 0.54 x __ = 540
D. 0.097 x __ = 970
E. 0.97 x __ = 97
Answer:
x by 10
Step-by-step explanation:
the decimal will have to move by one digit
. Leslie is blowing up one of her favorite photographs to hang on her wall. If the photo's original length and height were 8 inches and 15 inches, and the new height is 4 feet, how many feet must the new picture be
Answer:
[tex]L_2 = 2\frac{2}{15}\ ft[/tex]
Step-by-step explanation:
Given
Original
[tex]Length(L_1) = 8\ in[/tex]
[tex]Height (H_1) = 15\ in[/tex]
New
[tex]Height (H_2) = 4\ ft[/tex]
Required
Determine the new length (L2)
Since the original photographs was blown up; the original and the new photographs would have the same ratio
i.e.
[tex]Ratio = L_1 : H_1[/tex]
and
[tex]Ratio = L_2 : H_2[/tex]
Equate both ratios
[tex]L_1 : H_1 = L_2 : H_2[/tex]
Rewrite as fraction
[tex]\frac{L_1}{H_1} = \frac{L_2}{H_2}[/tex]
Substitute values for L1, H1 and H2
[tex]\frac{8}{15} = \frac{L_2}{4}[/tex]
Multiply both sides by 4
[tex]4 * \frac{8}{15} = \frac{L_2}{4} * 4[/tex]
[tex]4 * \frac{8}{15} = L_2[/tex]
[tex]\frac{4 * 8}{15} = L_2[/tex]
[tex]\frac{32}{15} = L_2[/tex]
[tex]2\frac{2}{15} = L_2[/tex]
[tex]L_2 = 2\frac{2}{15}\ ft[/tex]
The new length must be [tex]2\frac{2}{15}\ ft[/tex]
The new picture must be [tex]2\frac{2}{15}[/tex] feet or 2.1334 feet in length.
We know, [tex]1\ inch= \frac{1}{12}\ feet[/tex]
Given to us:
Initial length, [tex]L_i =8 inches[/tex];
Initial height, [tex]H_i =15\ inches[/tex];
Final height, [tex]H_f = 4\ feet[/tex];
We know that a when a picture is blown up(enlarged), it is always done in a specific ratio, therefore
Ratio, [tex]r=\dfrac{Length}{Height}[/tex]
So,
[tex]\dfrac{Initial\ Length}{Initial\ Height} =\dfrac{Final\ Length}{Final\ Height}[/tex],
[tex]\dfrac{8}{15} =\dfrac{Final\ Length}{4}\\\\{Final\ Length}=\dfrac{8}{15} \times 4 \\\\{Final\ Length}=\dfrac{32}{15}\\\\{Final\ Length}=2\frac{2}{15}\ feet[/tex]
Hence, the new picture must be [tex]2\frac{2}{15}[/tex] feet or 2.1334 feet in length.
To know more visit:
https://brainly.com/question/8552546
Multiply (x-7) (x^2+2x+3)
Answer:
x^3 - 5x^2 - 11x - 21
Step-by-step explanation:
(x - 7) (x^2 + 2x + 3)
use distributive property, basically means multiply
x^3 + 2x^2 + 3x - 7x^2 - 14x - 21
add like terms
x^3 - 5x^2 - 11x - 21
Consider the sequence 60, 53, 46, 39, 32, 25, ...
The tenth term of this sequence is?
Answer:
-3
Step-by-step explanation:
Answer: -3
Step-by-step explanation:
You already have 6 terms. And you can find that it has a constant difference of 7. 4 more terms. -7x4 is 28. 25-28 is -3.
Hurry
A matrix contains 48 elements. Which of the following cannot equal the number of rows of the matrix?
A.18
b. 16
c. 8
d. 24
ОА
OB
Ос
OD
A. 18
A matrix is a rectangular array of numbers arranged in rows and columns. The array of numbers below is an example of a matrix. The number of rows and columns that a matrix has is called its dimension or its order. By convention, rows are listed first; and columns, second.Here the matrix contains 48 elements and the factors of 48 are
48×1,1×48
24×2,2×24
12×4,4×12
6×8,8×6
3×16,16×3
So, 18 is not the factor of 48.
16, 8, and 24 can go into 48 but not 18.
Therefore option A is correct.
Learn more:https://brainly.com/question/14950654
Simplify:-3(x-4)+7(4-x)-2(8x-10)
Answer:
[tex]-26x+60[/tex]
Step-by-step explanation:
First I like to write the whole equation.
[tex]-3(x-4)+7(4-x)-2(8x-10)[/tex]
Now we should distribute where ever we see it's needed.
[tex]-3x+12+28-7x-16x+20[/tex]
Next we combine the like terms.
[tex]-26x+60[/tex]
That's it there's nothing else we can do now, it's in simplest form.
I'm putting all my savings into stocks because stocks always outperform other types of investments over the long term
Incomplete question. The full question read;
Decide whether the following statement makes sense (or is clearly true) or does not make sense (or is clearly false). Explain your reasoning.
I'm putting all my savings into stocks because stocks always outperform other types of investments over the long term.
Choose the correct answer below.
A. The statement does make sense because stocks historically outperform bonds and cash over the long term and investing in stocks is high-risk, which offers higher returns.
B. The statement does not make sense because although stocks historically outperform bonds and cash over the long term, investing in stocks is high-risk and there is no guarantee that the investment will yield a high return.
C. The statement does make sense because stocks are a low-risk investment, offering predictable low returns.
D. The statement does not make sense because stocks never outperform bonds and cash over the long term.
Answer:
B. The statement does not make sense because although stocks historically outperform bonds and cash over the long term, investing in stocks is high-risk and there is no guarantee that the investment will yield a high return.
Step-by-step explanation:
Of course, the statement does not make sense because it does clearly say the reality about stocks. By saying "stocks always outperform" other investment types it hides the possibility of losses from stock investments.
For example, a company's stock may be negatively affected as a result of employee layoffs or unexpected company scandals. Hence, there is no guarantee that the investment will yield a high return.
Solve: 7|x| = 42
36
–6 or 6
no solution
6
Answer:
6
Step-by-step explanation:
7×6=42 so 6 is x so this is your answer
Answer:
-6 or 6
Step-by-step explanation:
7x|x|=42 (divide both sides)
|x|=6 (separate into possible cases)
x=6
x=-6 (the equation has two solutions)
hope this helps!
what is the answer? and can you do it step by step
Answer:
I'm not 100% sure but.... I think it would be the last choice?
Step-by-step explanation:
