-3x-4y=12 solve for Y

Answer:

Step-by-step explanation:

What are you supposed to do

Answer: 5:17

Step-by-step explanation: Add both ratios together to get the complete amount of days.

Answer:

5:17

the rainy days amount is 5 and the total amount of days is 17 (12+5) so 5:17

The probability that a student will take no more than 40 minutes to complete tee examination is 0.00.

What is probability?

The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. An event's probability is a number between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty.

Given:

The length of time it takes students to complete a statistics examination is uniformly distributed and varies between 40 and 60 minutes.

We have to find the probability that a student will take no more than 40 minutes to complete the examination.

As the time required to complete the statistics examination is uniformly distributed and varies between 40 and 60 minutes so no any student will take less than 40 minutes to complete the examination.

P(X ≤ 40) = 0   where 40 ≤ x ≤ 60

Hence, the probability that a student will take no more than 40 minutes to complete tee examination is 0.00.

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Increase the likelihood of rejecting the null hypothesis and increase measures of effect size.

What is the t - test?

When the population standard deviation is unknown, the student's t-test in statistics is a method for testing assumptions about the mean of a small sample taken from a population with a normally distributed sample size.

The independent samples t-test examines whether the two distinct values are different from one another when comparing two means, one of which is calculated from one set of scores and the other of which is calculated from another set of scores.

A two-sample t-test should be used to compare two independent means. The variances for both samples must be equal according to the test's premise.

Welch's test for unequal variances should be used if they are not.

Increase the probability of rejecting the null hypothesis and the size of the effect measurements.

Hence, Increase the likelihood of rejecting the null hypothesis and increase measures of effect size.

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Answer:

When you combine like terms, you look for the same variable or look for constants. In this case, the same variable if 'k'. Now you add the coefficients 7 and 3, which is 10. So the expression simplifies to 10k + 11.

Hope this helps!

Answer:

10k + 11

Step-by-step explanation:

Like terms are terms that have the same amount of the same variables.

In this case, note that two of the terms have the variable "k" attached:

7k & 3k, respectively.

In this case, the question asks you to combine like terms, or to simplify the given expression:

7k + 3k + 11

(7k + 3k) + 11

10k + 11

10k + 11 is your answer.

~

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Answer:

Step-by-step explanation:

a^2 +b^2 =c^2

8^2 +14^2=y^2

64+196 =y^2

260=y^2

(260)^1/2 =y

Simplified: 4^1/2  * 65^1/2= 2(65^1/2)

By evaluating the piecewise function we will see that the difference is:

f(1) - f(-7) = 3

Here we have a piecewise function defined on the image, and we want to find the difference:

f(1) - f(-7).

First, let's find these values.

f(1) means that we need to evaluate the function in x = 1.

Notice that the second piece can be used on the domain 4 < x ≤ 1, so we need to use that part.

f(1) = -(1)^2 - 3*1

f(1) =-1 - 3 = -4

To evaluate in x = -7 we need to use the first piece of the function:

f(-7) = |-7 + 5| - 9

f(-7) = |-2| - 9 = -7

Then the difference is:

f(1) - f(-7) = -4 - (-7) = -4 + 7 = 3

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The linear equations has one solution which is and the solution at (3, −1)

The slope of the points (-3, -3) and (0, -2) is solved to get

m = (-2 - -3) / ( 0 - -3)

m = 1 /3

using point slope formula

y - -2 = 1/3(x - 0)

y + 2 = x/3

y = x/3 - 2

The slope of the points (0, 5) and (1,  3) is solved to get

m = (3 - 5) / (1 - 0)

m = -2

using point slope formula

y - 5 = -2(x - 0)

y - 5 = -2x

y = -2x + 5

solving simultaneously

y = -2x + 5

y = x/3 - 2

subtraction gives

0 = -7x/3 + 7

7x/3 = 7

x = 3 and y = -1

(3, -1) is the only solution

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Answer: You can watch 14 vines.

Step-by-step explanation: 1 2/5 is equal to 1 4/10

1 4/10 is equal to 14/10

So the amount of vines you could watch is 14 in 1 minute and 24 seconds.

Answer:

D. (-3, 4)

Step-by-step explanation:

Hope it helps!

Answer:

about 15/16

Step-by-step explanation:

The distance between the rock and the surface is 827.20 cm.

Given data,

There is a robot on Mars' surface. 13.33 degrees of depression can be seen between a camera in the robot and a boulder on the surface of Mars. 196.0 cm is how high the camera is from the ground.

How far is the rock from the camera?

From the given data,

tan c = AB/BC

tan 13.33° = 196/BC

BC = 196/tan 13.33°

BC = 827.20 cm

Hence, the distance between the rock and the surface is 827.20 cm.

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The equation of the circle with endpoints of a diameter at the points (3, 8) and (-5, 6) is x² + y² + 2x - 14y + 33 = 0.

These are the specified parameters:

Endpoints of a diameter at the points (3, 8) and (-5, 6).

Determine the center point of the circle (a, b).

(a, b) = ((x₁ + x₂)/2 , (y₁ + y₂)/2)

        = ((3 + (-5))/2 , (8 + 6)/2)

        = (-2/2 , 14/2)

        = (-1, 7)

The center point is (-1, 7).

Determine the radius of the circle (r).

[tex]\begin{aligned} r & = \frac{1}{2} \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2} \\r & = \frac{1}{2} \sqrt{(-5-3)^2 + (6-8)^2} \\ r& = \frac{1}{2} \sqrt{(-8)^2 + (-2)^2} \\ r& = \frac{1}{2} \sqrt{64 + 4} \\ r & = \frac{1}{2} \sqrt{68} \end{aligned}[/tex]

Determine of the equation of the circle

(x - a)² + (y - b)² = r²

(x - (-1))² + (y - 7)² = (1/2 √68)²

x² + 2x + 1 + y² - 14y + 49 = 1/4 × 68

x² + y² + 2x - 14y + 50 = 17

x² + y² + 2x - 14y + 50 - 17 = 0

x² + y² + 2x - 14y + 33 = 0

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Answer: $1.25.

Step-by-step explanation: The unit price of the oatmeal is calculated by dividing the total cost by the weight of the carton. In this case, the unit price is $6.25 / 5 pounds = $1.25 per pound. This means that for every pound of oatmeal, the cost is $1.25.

Answer:

dang he beat me to it

Step-by-step explanation:

6.25/5 is 1.25 per pound

The answer to the following algebra is;

b² at b = 4 is 16

y /5 at y = 15 is 3

27/s at s = 9 is 3

q/3 + 4 at q = 3 is 5

Algebra is the system for computation using letters or other symbols to represent numbers, with rules for manipulating these symbols.

Given the following:

b² at b = 4

substitute b = 4

= 4²

= 4 × 4

= 16

y /5 at y = 15

substitute y = 15

= 15/5

= 3

27/s at s = 9

substitute s = 9

= 27/9

= 3

q/3 + 4 at q = 3

substitute q = 3

= 3/3 + 4

= 1 + 4

= 5

In conclusion, the algebraic expression is solved by substituting the value of the variables.

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$600 is the original price of the article if the  price of an article is 20% and new price is $150

percentage, a relative value indicating hundredth parts of any quantity.

Given,

The increase in price of an article is 20%

The new price is $150

We need to find the original price of the article.

Let 20% of x=150

20/100x=150

0.2x=150

Divide both side by 0.2

x=750

Now subtract 750 and 150 we get original price

750-150

600

Hence, $600 is the original price of the article if the  price of an article is 20% and new price is $150

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The number of days would be 10 and the maximum percent of the population infected would be 25.752%.

What are exponential functions?

The exponential function, denoted by [tex]e^x[/tex], is a mathematical function. Unless otherwise specified, the term refers to a positive-valued function of a real variable, though it can be extended to complex numbers or generalized to other mathematical objects such as matrices or Lie algebras.

[tex]p(t) = 7te^{-\frac{t}{10}}[/tex]

percentage of infected people a maximum when p '(t) = 0

                    [tex]p '(t) = 7(1)e^\frac{-1}{10} +7te^\frac{-t}{10}(\frac{-1}{10})\\\\p'(t)=e^{-\frac{t}{10}}(7 -\frac{7t}{10})\\\\e^{-\frac{t}{10}}(7 -\frac{7t}{10})=0\\\\7 -\frac{7t}{10}=0\\\\t = 10[/tex]

Hence percentage of infected people reaches a maximum after 10 days

maximum percent of the population infected = p(10)

    [tex]p(10) = 7(10)e^{-\frac{10}{10}}\\\\p(10)=\frac{70}{e}\\\\P(10)=25.752\%[/tex]

Hence, the number of days would be 10 and the maximum percent of the population infected would be 25.752%.

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Answer:

Step-by-step explanation:

if you do 65.12 * 15% you will get 9.768

subtract that from 65.12 you will get 55.352

round that to the nearest hundredth it is 55.35

The ways in which a kindergarten teacher distributes the books are (a) 20 ways (b) 100 ways (c) 3,628,800 ways.

(a) There are 20 ways for her to distribute the books if they are all the same and no child gets more than one. Each of the 20 children can receive one of the five books.

(b) There are 100 ways for her to distribute the books if they are different and no child gets more than one. Each of the 20 children can receive one of the five different books, so there are 5x4x3x2x1 = 100 possible ways for her to distribute the books.

(c) There are 3,628,800 ways for her to distribute the books if they are all the same and there is no restriction on the number of books that can be given to any child. This is because each child can receive any number of books from 0 to 5. Therefore, there are 6x6x6x6x6 = 6^5 = 3,628,800 possible ways for her to distribute the books.

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The complete question is:

A kindergarten teacher has five books to distribute to 20 children in her class.

(a) How many ways are there for her to distribute the books if they are all the same and no child gets more than one?

(b) How many ways are there for her to distribute the books if they are different and no child gets more than one? If Charlie gets Green Eggs and Ham and Amanda gets The Cat in the Hat, that is a different distribution from the one in which Amanda gets Green Eggs and Ham and Charlie gets The Cat in the Hat.

(c) How many ways are there for her to distribute the books if they are all the same and there is no restriction on the number of books that can be given to any child?

1) The system of equations to solve the given problem are:

2l-3=3b

2(l+ b)=48

2) The variables l and w stands for length and width, respectively.

3) Length l=15 and Width w=9

4) The graph of the solution is shown below:

A perimeter is a closed path that covers, surrounds, or outlines a two-dimensional shape or a one-dimensional length.

The perimeter calculation has various practical uses. A calculated perimeter is the length of fencing required to encircle a yard or garden. The circumference of a wheel/circle specifies how far it will roll in one revolution. Similarly, the amount of string coiled around a spool is proportional to the spool's perimeter; if the length of the string were precise, it would equal the perimeter.

1) The system of equations to solve the given problem are:

2l-3=3b

2(l+ b)=48

2) Here the variables are l, w

The variables l and w stands for length and width, respectively.

3) Given, perimeter of the triangle=48 inches

2l-3=3b

l=(3(b+1))/2

So, 2(l+ b)=48

3b+3+2b=48

5b=45

b=9

l=(3(10))/2

l=15

Therefore, length l=15 and width w=9

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If the top slips down the wall at a rate of 2 ft/s, then 3.476 ft/s fast the foot will be moving away from the wall when the top is 10 feet above the ground.

In the given question, a 15 foot ladder is leaning against a wall. if the top slips down the wall at a rate of 2 ft/s.

We have to find how fast will the foot be moving away from the wall when the top is 10 feet above the ground.

As given, 15ft ladder dy/dt= -2y=13ft

Let the length be x and height be y

So from the Pythagorean theorem

x^2+y^2=h^2

Now apply the above formula to get the value

x^2+y^2=15^2

Take the derivative with respect to time

2x * dx/dt+2y*dy/dt=0

dx/dt= -y/x *dy/dt

When y = 13

then x^2+13^2=15^2

x = 7.48

dx/dt= -13/748 * (- 2)

dx/dt= 3.476 ft/s

Hence, if the top slips down the wall at a rate of 2 ft/s, 3.476 ft/s fast will the foot be moving away from the wall when the top is 10 feet above the ground.

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Answer: 10 months

Step-by-step explanation:

432 + 40x >505 + 32x

40x >32x + 73

8x > 73

8x/8 > 73/8

x > 73/8 = 9.125

Round 9.125 to 10

The number of months that will take Lola to have more trading cards is obtained as 8.

Linear inequality refers to the relation between a linear algebraic expression to some known value that contains inequality sign.

Unlike a linear equation it can have a range of values inside an interval.

The number of cards with Lola and Joel are 432 and 505 respectively.

Suppose the number of required month be x.

Then, the inequality expression can be written for the given case as,

432 + 40x > 505 + 32x

⇒ 40x - 32x > 505 - 432

⇒ 8x > 63

⇒ x > 63/8

The number of months should be an integer value.

And, the nearest integer value of the greater than 63/8 is 8.

Hence, the number of months required for the given case is 8.

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The probability of getting 5 black chips and 6 white chips is [tex]\frac{7}{22}[/tex].

What do you mean by probability?

Mathematical explanations of the likelihood that an event will occur or that a statement is true are referred to as probabilities. A number between 0 and 1 represents the likelihood of an event, with 0 generally denoting impossibility and 1 denoting certainty.

According to data in the given question,

We have the given information:

Total number of different colored chips = 35

Number of black chips = 20

Number of white chips = 15

And you draw 11 chips at random.

Now, we will calculate the probability of getting 5 black chips and 6 white chips,

[tex]P(B) = \frac{5}{20} =\frac{1}{4} \\P(W) = \frac{6}{15} =\frac{2}{5} \\P( black and white ) = \frac{\frac{1}{4}*\frac{2}{5}}{\frac{11}{35} } \\=\frac{\frac{1}{2}*\frac{1}{5}}{\frac{11}{35} }\\=\frac{1}{10}*\frac{35}{11}=\frac{7}{22}[/tex]

Therefore, the probability of getting 5 black chips and 6 white chips is 7/22.

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We reject the null hypothesis and come to the conclusion that their argument is adequately supported.

Given that,

z = 2.14 and p value = 0.0162

a) Hypotheses are

H₀ : p≤  0.40

H₀ : p > 0.40  (claim)

This is right tailed test.

b) p value = 0.0162

c) Test statistic Z =2.14

P(Z>2.14) = 1 - P(Z≤2.14)

               = 1 - 0.98382

               = 0.01618

P value ≈  0.01618

d) P value is less than α = 5% = 0.05

So, we reject the null hypothesis and conclude that they have enough evidence in support of their claim

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Answer: 5.072

Step-by-step explanation: -0.8-2.14=-6.2

                                                     +2.14 |  +2.14

-----------------------------------------------------------------------------------------------

                                                              -4.06/-0.8=5.072

Answer: 6.25%

Step-by-step explanation:

To find what percent 61 is of 976, we divide 61/976. This comes out to be 0.0625. Multiply by 100 to get your percentage, and it's 6.25%.

The arrangements are there with no pair of consecutive letters the same is ∑ₐⁿ(−1)^k2^k(2n−k)!C(n,k).

Given 2n letters, two of every one of n types. What number of courses of action of these letters are there without any sets of sequential letters something similar? Kindly look at my answer and let me know where my mix-up is!

So such plans where the sets of indistinguishable letters are discernible. Then, at that point, ∑ₐⁿ(−1)^k2^k(2n−k)!C(n,k) gives the quantity of such plans by incorporation avoidance (there are (2n−k)! ways for k given matches to be together (by combining the those sets into single components) and the rest randomly requested, 2k ways of requesting inside those given matches, and C(n,k) ways of picking those k pairs).So we can acquire the recipe

∑ₐⁿ(−1)^k2^k(2n−k)!C(n,k)

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The number of ways the letters of the word DANCER can be arranged if D and A remain together is 120 ways .

In the question ,

it is given that the word is DANGER ,

the number of letters in the given word is = 6

it is given that the letters D and A are together ,

that means they are a single unit ,

So , the number of letters become = 5 letters

and  5 letters can be arranged in 5! ways ,

which can be simplified  as

5! [tex]=[/tex] 5 * 4 * 3 * 2 * 1 [tex]=[/tex] 120 ways

Therefore , the number of ways of arrangement is 120 ways .

The given question is incomplete , the complete question is

How many ways can the letters of the word DANCER be arranged in a row if D and A must remain together (in order) as a unit ?

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Answer:

c = s - (8×18)

Step-by-step explanation:

S = 8×18+6 = 150

c = s - (8×18)

As described in probability Null hypothesis is 0.64

what is probability?

Probability is a synonym for potential. It is a field of mathematics that examines how random events happen. From zero to one, the value is expressed. To forecast the likelihood of events, probability has been introduced in mathematics.

Solution:

Null hypothesis H0 : p =  0.64

Alternate hypothesis Ha : p ≠ 0.64

therefore  Null hypothesis is 0.64

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