Use the number line​ below, where RS=7y+2​, ST=5y+7​, and RT=14y−3. a. What is the value of​ y? b. Find​ RS, ST, and RT.

The question is missing. Here is the complete question.

Let y = [tex]\left[\begin{array}{ccc}2\\6\end{array}\right][/tex] and u = [tex]\left[\begin{array}{ccc}7\\1\end{array}\right][/tex]. Write y as the sum of a vector in Span(u) and a vector orthogonal to u.

Answer: y = [tex]\left[\begin{array}{ccc}\frac{21}{10} \\ \frac{3}{10} \end{array}\right] + \left[\begin{array}{ccc}\frac{-1}{10}\\ \frac{57}{10} \end{array}\right][/tex]

Step-by-step explanation: The sum of vectors is given by

y =  [tex]y_{1}[/tex] + z

where  [tex]y_{1}[/tex] is in Span(u);

vector z is orthogonal to it;

First you have to compute the orthogonal projection [tex]y_{1}[/tex] of y:

[tex]y_{1}[/tex] = proj y = [tex]\frac{y.u}{u.u}.u[/tex]

Calculating orthogonal projection:

[tex]\left[\begin{array}{c}2\\6\end{array}\right][/tex].[tex]\left[\begin{array}{c}7\\1\end{array}\right][/tex] = [tex]\left[\begin{array}{c}9\\6\end{array}\right][/tex]

[tex]\left[\begin{array}{c}7\\1\end{array}\right][/tex].[tex]\left[\begin{array}{c}7\\1\end{array}\right][/tex] = [tex]\left[\begin{array}{c}49\\1\end{array}\right][/tex]

[tex]y_{1} = \frac{9+6}{49+1}.u[/tex]

[tex]y_{1} = \frac{15}{50}.u[/tex]

[tex]y_{1} = \frac{3}{10}.u[/tex]

[tex]y_{1} = \frac{3}{10}.\left[\begin{array}{c}7\\1\end{array}\right][/tex]

[tex]y_{1} = \left[\begin{array}{c}\frac{21}{10} \\\frac{3}{10} \end{array}\right][/tex]

Calculating vector z:

z = y - [tex]y_{1}[/tex]

z = [tex]\left[\begin{array}{c}2\\6\end{array}\right] - \left[\begin{array}{c}\frac{21}{10} \\\frac{3}{10} \end{array}\right][/tex]

z = [tex]\left[\begin{array}{c}\frac{-1}{10} \\\frac{57}{10} \end{array}\right][/tex]

Writing y as the sum:

[tex]y = \left[\begin{array}{c}\frac{21}{10} \\\frac{3}{10} \end{array}\right] + \left[\begin{array}{c}\frac{-1}{10} \\\frac{57}{10} \end{array}\right][/tex]

Answer:

16/33

Step-by-step explanation:

The probability that the first ball is red and the second ball is black is:

8/12 × 4/11 = 8/33

The probability that the first ball is black and the second ball is red is:

4/12 × 8/11 = 8/33

So the total probability of drawing one ball of each color is 8/33 + 8/33 = 16/33.

2 terms

Step-by-step explanation:

4[8+2x]

=4*8+4*2x

=32+8x

therefore there are 2 terms

hope it helps u if yes pls mark brainliest

Answer:

The first factor (4) consists of one (1) term, "4".

The second factor (8 +3x) consists of two (2) terms, "8" and "3x".

Answer & Step-by-step explanation:

For this problem, we have to find the equations that have a value of 10 for the variable y. Immediately, we can eliminate some answers. We can eliminate A, D, and E because they all have a different value for the variable y. So, that leaves us with answer choices B and C.

In order to check to see if we are correct, let's plug in 10 for the y in answer choices B and C.

B:

8 = 18 - y

8 = 18 - 10

8 = 8

C:

60 = 6y

60 = 6(10)

60 = 60

So, as you can see, we are correct and we have successfully found the correct answer to the given problem.

Answer:

B and C

Step-by-step explanation:

We want to find the equations where y=10 is a solution. Let's plug 10 into each equation and solve.

A. y+11=22

10 +11 =22

Add 10 and 11.

21 ≠ 22

21 does not equal 22. This choice is incorrect.

B. 8= 18-y

8=18-10

Subtract 10 from 18.

8=8

8 equals 8. This choice is correct.

C. 60=6y

60=6(10)

Multiply 6 and 10.

60=60

60 equals 60. This choice is correct.

D. y/5=4

10/5=4

Divide 10 by 5.

2≠4

2 does not equal 4. This choice is incorrect.

E. 10y=20

10(10)=20

Multiply 10 and 10.

100≠20

100 does not equal 20. This choice is incorrect.

The equations where y=10 is a solution are B. 8=18-y and C. 60=6y

Answer:

  maybe

Step-by-step explanation:

It depends on your strategy for determining ordered pairs.

A straightforward interpretation of the problem would say 1 roll gives an x-value, and the next roll gives the corresponding y-value. If that is the strategy, in 10 rolls, there will be repeats of the x-value. So, the pairs cannot represent a function.

__

If you adopt a different strategy, such as using the rolled number as the tens digit of the x-value, and sequentially assigning the numbers 0 to 9 to the units digit of the x-value, then all of the x-values will be different. Regardless of how you arrive at the y-values, the result will always be a function when graphed.

__

Basically, any strategy that makes it likely that the x-values will be different makes it likely that the relation will be a function. Otherwise, it is unlikely (or impossible) that the relation will be a function.

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Hi my lil bunny!

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Answer =   [tex]\boxed {x - 2}[/tex]

[tex]3x +1(2x-1)2-1(6x)[/tex]

= [tex]\boxed {3x + 1 . ( 2x - 1 ) . 2 - 1 (6x) = x - 2}[/tex]

Steps :

[tex]3x + 1 . (2x - 1) . 2 - 1 . (6x)[/tex]

Remove the parentheses : [tex](a) = a[/tex]

[tex]= 3x + 1 * (2x- 1) * 2 - 1 * 6x[/tex]

Multiply the numbers : [tex]1 * 2 = 2[/tex]

[tex]= 3x + 2 ( 2x - 1 ) * 6x[/tex]

Multiply the numbers : [tex]1 * 6 = 6[/tex]

[tex]= 3x + 2 ( 2x - 1 ) -6x[/tex]

Expand: [tex]2 (2x - 1) : 4x - 2[/tex]

[tex]2 ( 2x - 1 )[/tex]

Apply the distributive law : [tex]a (b - c) = ab - ac[/tex]

[tex]a = 2, b = 2x, c = 1 \\= 2 * 2x - 2 * 1[/tex]

Simplify [tex]2 * 2x - 2 * 1 : 4x - 2[/tex]

= [tex]= 4x - 2[/tex]

[tex]= 3x + 4x - 2 - 6x[/tex]

Simplify [tex]3x + 4x - 2 - 6x : x - 2[/tex]

= [tex]x - 2[/tex]

❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙

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Have a great day/night!

❀*May*❀

Answer:

X=5 Y=-4

Step-by-step explanation:

Answer:

30000

Step-by-step explanation:

3000 / (1/10) = w

3000*10/1 = w

30000 = w

probe:

30000*1/10 = 3000

then:

30000

is 1/10

of

30000

Answer:

A. The digit 8 is in the place one million position

B. The digit 3 is in the place tens position

Step-by-step explanation:

Given:

98,045,132.706

9 is in the ten million position

8 is in the one million position

0 is in the hundred-thousand position

4 is in the ten-thousand position

5 is in the one-thousand position

1 is in the hundred position

3 is in the tens position

2 is in the one position

. Decimal

7 is in the tenth position

0 is in the hundredth position

6 is in the thousandth position

Therefore,

A. The digit 8 is in the place one million position

B. The digit 3 is in the place tens position

Answer:

2.75 L

Step-by-step explanation:

This is the problem of subtraction.

Total Milk sumana has = 7.5 l

Milk used in the morning = 4.75 L

Milk left for evening = Total Milk sumana has - Milk used in the morning

Milk left for evening = 7.5 l - 4.75 l = 2.75 L

Answer:

The angle of elevation of the sun is 38°

Step-by-step explanation:

We can set up the diagram for the the question by interpreting it, you can check the diagram at the attached file.

We can see that after the interpretation of the question we arrived at a triangle,. Where the vertical side represent the 92-ft. which is the height of the tree and the horizontal side represent the 120 ft. which is the shadow's lenght. Then the angle of elevation of the sun can ba calculated using tangent ratio, from our knowledge of trigonometry

Tan(θ )= opposite/adjacent

Where our opposite =92ft

Adjacent= 120ft

Tan(θ ) =92/120

θ =tan-1( 92/120)

θ = 37.48°

Therefore, the angle of elevation of the sun If we round up our decimal value to the nearest 10th, we have θ = 38°

Answer:

[tex]m=\frac{3}{2}[/tex]

Step-by-step explanation:

When two lines are perpendicular, their slopes will be opposite reciprocals:

[tex]-3[/tex] → [tex]\frac{1}{3}[/tex]

[tex]\frac{1}{4}[/tex] → [tex]-4[/tex]

Solve the first equation for y to rewrite in slope-intercept form:

[tex]y=mx+b\\\\3y+2x=7\\\\3y+2x-2x=7-2x\\\\3y=-2x+7\\\\\frac{3y}{3}=\frac{-2x}{3} +\frac{7}{3} \\\\y=-\frac{2}{3}x+\frac{7}{3}[/tex]

m is the slope, so the slope of this line is [tex]-\frac{2}{3}[/tex]. The opposite reciprocal is [tex]\frac{3}{2}[/tex], therefore, m is [tex]\frac{3}{2}[/tex]

Answer: 6 m is greater

Step-by-step explanation:

Cm is less than m

Hope it helps

Answer:

25. <

26. <

27. >

28. <

29. <

30. >

Hope it helps!

lovelymoonlight ✨

Answer:

Step-by-step explanation:

8 3/5 on a number line is between 8 and nine

idk how to draw a number line on a computer so ill just tell you how

1. divided the spaces between 8 and 9 into 5 sections ( 3/5 )

2. then mark 3 of those 5 spaces and put a dot or a line at where the 3rd space ends

Answer:

change f(x) to y, switch x and y, and solve for y

y = √(x -4)

x = √(y - 4)

x² = y - 4

x² + 4 = y

y = x² + 4

f⁽⁻¹⁾ = x² + 4, where x ≥ 4

Answer:

E

Step-by-step explanation:

So we already know that:

[tex]\lim_{x \to 5} f(x)=2 \text{ and } \lim_{x \to 5} g(x)=-6[/tex]

So, go through each of the choices and see which ones are correct.

I)

We have:

[tex]\lim_{x \to 5} (f(x)+g(x))[/tex]

This is the same as saying:

[tex]\lim_{x \to 5} f(x)+ \lim_{x \to 5} g(x)[/tex]

And since we already know the values:

[tex]=(2)+(-6)\\=-4[/tex]

So, the limit does indeed exist.

II)

We have:

[tex]\lim_{x \to 5} \frac{f(x)}{g(x)+6}[/tex]

This is the same as:

[tex]\frac{ \lim_{x \to 5} f(x)}{ \lim_{x \to 5} g(x)+ \lim_{x \to 5} 6 }[/tex]

The bottom right one is just 6. Simplify:

[tex]\frac{ \lim_{x \to 5} f(x)}{ \lim_{x \to 5} g(x)+6}[/tex]

Substitute the values we know:

[tex]=\frac{(2)}{(-6)+6} \\=2/0[/tex]

This is a value over zero. Unlike the indeterminate form 0/0, this limit does not exist.

III)

We have:

[tex]\lim_{x \to 5} \frac{f(x)-2}{g(x)}[/tex]

Again, this is the same as:

[tex]\frac{ (\lim_{x \to 5} f(x))-2}{ \lim_{x \to 5} g(x)}[/tex]

Substitute in the values we know:

[tex]=\frac{(2)-2}{(-6)}\\ =0/-6=0[/tex]

The limit does exist and it is 0.

So, the limits of only I and III exist.

The correct answer is E.

Answer: He bought 4 cupcakes and 12 donuts

Step-by-step explanation:

He bought three times as many donuts as cupcakes so we could represent that by the equation  d= 3c  where d is donuts and c is the cupcakes.

If cupcakes also cost 50 cent and donuts cost a dollar each and he spent a total of 10 dollars then we could also represent that by the equation  

0.50d + 1c = 10    

Now combine use the two equations and solve for d and c

d= 3c

0.50d + 1c =10    substitute d in the first equation into the second equation.

0.50(3c) + 1c =10

1.5c + 1c =10

2.5c = 10

  c=  4  

In this case he bought a total of 4 cupcakes and to find the total of donuts that he bought we multiply that by 3 because he bought three times as much as that.

d= 3 * 4

d = 12

Answer:

Kindly check explanation

Step-by-step explanation:

Given the Coefficient of correlation (r) = 0.864

The Coefficient of determination (R^2) :

0.864^2 = 0.747 ( 3 decimal places)

B) the Coefficient of determinationR^2 tells about the proportion of variation in the dependent variable that is predicted by the independent variable, Hence, a proportion of about 0.75 should fall within the regression line.

C) percentage variation explained :

Coefficient of determination * 100%

0.747 * 100% = 74.7%

D) unexplained variation due to other factors or sampling error :

(total variation - explained variation) = (100 - 74.7)% = 25.3%

Answer:

Step-by-step explanation:

7 3/24   + 4/24

7 7/24

Answer:

The  value is  [tex]Z_{\alpha } = 1.439[/tex]

Step-by-step explanation:

From the question we are told that

   The  confidence level is  C  =  85%  

Generally the level of significance is mathematically represented as

         [tex]\alpha = (100 - 85 )\%[/tex]

        [tex]\alpha = 0.15[/tex]

Now from the normal distribution table  the critical value  of [tex]\alpha[/tex] is  

     [tex]Z_{\alpha } = 1.439[/tex]

Answer:

The correct answer is:

It is a discrete random variable. (A)

Step-by-step explanation:

Discrete Random Variables are variables that have distinct values. The number of variables that can be taken on can be counted. in this example, the variables to the question Did you smoke in the last week? is one of two possibilities; yes or no. Apart from these two values, there is no other possibility for the variables, hence it is a discrete random variable

Continuous Random Variables are values that can take on any value between distinct values, even up to infinity. The number of values that the variables can take on cannot be counted or listed. For example, is there are variables for the possible temperature that a particular city can take on in a day, the values are continuous random variables because the values do not have any distinct value, and the possibilities cannot be counted. the possibilities can be; anywhere between 20°C to 50°C. between these two, temperatures, you can have infinite possibilities; 20.1, 30.5, 40.8, etc. Hence the values cannot be counted, it is thus a continuous random variable.

Answer:

c not random variable

Step-by-step explanation:

Answer:

5m/s;

6 seconds

Step-by-step explanation:

Given the following :

Initial position = 30 m below

He climbed at a constant rate, and was 7.5 m below after 4.5 s.

Distance climbed or covered in 4.5 seconds :

(Initial position - current position)

(30 - 7. 5)m = 22.5 meters

Using the relation:

Speed = distance covered / time taken

Therefore,

Shota's speed = 22.5m / 4.5s = 5m/s

Time taken to reach edge of volcano :

Distance left to cover = 7.5m

Speed = 5m/s

Time required to cover remaining distance :

= distance / speed

= (7.5m ÷ 5m/s) = 1.5s

Total time to reach edge :

(4.5 + 1.5)s = 6 seconds

Answer:

5m/s

6 seconds

Step-by-step explanation:

did it on khan

Answer:

Cluster sampling

Step-by-step explanation:

The sampling technique used by Home Depot to select randomly 60 check out lines during a certain week in order to determine customers opinion of their pricing is called cluster sampling.

Cluster sampling is a sampling technique which is obtained by dividing the population into groups and selecting all individuals from within a random sample of the groups.

I think you omitted some options from the question which should include cluster sampling as the answer is not included in the options you gave in the question.

Answer:

last row equals 333

Step-by-step explanation:

The clock showing time 9:00 should be worth 9 points, and the clock showing 3:00 should be worth 3 points, giving for the first row:

9 + 9 + 3 = 21

the three equal calculators showing 1234 are worth 10 points each:

1+2+3+4 = 10

and 10 + 10 + 10 = 30

the light bulbs should be 15 points each then giving 15 + 15 - 15 = 130 - 15 = 15 Notice also that they all have 5 rays of light coming out (so a 3 points per ray)

Now for the bottom line we have:

9 + (1+2+2+4) times 3 * 12 (only four rays on each bulb thus 4 * 3 = 12)

Notice we added the figures that appear in the calculator.

9 + 9 * 36 = 333

Answer:

y = 9

Step-by-step explanation:

So if x = 3, we can sub that into the equation.

This gives us:

6.4 (* 3) + 2.8y = 44.4

so:

19.2 + 2.8y = 44.4

25.2 = 2.8y

so

y = 9

Answer: 9

Step-by-step explanation: plug 3 into the x, then use the order of operations/ pemdas to solve. first multiply 6.4 and 3 (=19.2) then subtract the answer from 44.4 (now the equation is 2.8y=25.2) then divide 2.8 from 25.2 to get x alone and you are left with x=9

Answer:

  see below

Step-by-step explanation:

The ordered pairs of the inverse function are the reverse of the ordered pairs of the function.

You are given the function has ordered pairs (-3, -2), (3, -1) and so on. The inverse function will have ordered pairs (-2, -3), (-1, 3), and so on. This matches choice A.

Complete Question

The complete question is shown on the first uploaded image

Answer:

The decision is to reject the null hypothesis at a significant level of significance [tex]\alpha = 0.05[/tex] There is sufficient evidence to conclude that at least one of the population mean  is different from  at least of the population  

Step-by-step explanation:

From the question we are told that the claim is

     The mean growth rates of all four species are equal.

The  null hypothesis is  

             [tex]H_o : \mu _1 = \mu_2 = \mu_3 = \mu_4[/tex]

Th alternative hypothesis is    

             [tex]H_a: at \ least \ one \ of \ the \ means \ is \not\ equal[/tex]

From question the p-value is [tex]p-value = 0.015[/tex]

  And since the [tex]p-value < \alpha[/tex] so the null hypothesis will be rejected

So  

   The decision is to reject the null hypothesis at a significant level of significance [tex]\alpha = 0.05[/tex] There is sufficient evidence to conclude that at least one of the population mean  is different from  at least of the population  

Answer:

total books in library = 39

books bought from yard sale = ??

Total book in library now = 84

Now,

books bought from yard sale= 39-84

= 45

Answer:

4

Step-by-step explanation:

The factors of 8 are 1, 2, 4, and 8.

60 is not divisible by 8, but it is divisible by 4:  4 * 15 = 60. So the GCF of 60 and 8 is 4.