What’s the answer please??

Note that the system of equations matched with their correct descriptions is given as follows:

1) x=y-3

2x - 2y = -6

Infinite Number of Solutions

2)5x + 2y = -7

10x + 4y = - 14

Infinite Number of Solutions

3) 3y - 6x = 3

4x - 3y = - 2

One solution

4)  3y - 6x =-3

4x - 2y = - 2

No solution

1)

Using substitution methods, let's solve for

x=y-3.................. (1)

2x - 2y = -6.........(2)

Let's keep both expressions as the subject of x

x=y-3 (Given)

2x - 2y = -6

Add 2y to both sides to isolate x

2x - 2y + 2y = -6 + 2y

2x = -6 + 2y (divide both sides by 2

x = y - 3  .........................(3)

Notice the similarity with (1)

Subsitite (3) into (2)  2x - 2y = -6

That is:
2(y - 3) - 2y = -6

⇒ -6 = -6  (Add 6 to both sides)

⇒ 0=0

Given the result above, the system of equations has an infinite number of solutions.

2)

Use the elimination method to solve the system of equations:

5x + 2y = - 7

10x + 4y = - 14

Equation 1 is in the correct ax + by format.

Equation 2 is in the correct ax + by format.

Step 1 - Multiply Equation 1 by 10:

10 * (5x+2y=-7) --> 50x + 20y = -70

Step 2 - Multiply Equation 2 by 5:

5 * (10x+4y=-14) --> 50x + 20y = -70

Step 3 - subtract Revised Equation 2 from Revised Equation 1:

50x + 20y = -70

-(50x + 20y = -70)

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

20y - 20y = -70 - -70

Step 4 - simplify and solve for y:

0 = 0

Given the above result, the system of equations has an infinite number of solutions


3)

3y - 6x = 3 .....(1)

4x - 3y = - 2 .....(2)

Solving by elimination, adding both equations will eliminate y
- 6x + 3y = 3

4x - 3y = - 2
-2x = 1

Thus, solving for x: (Divide both sides by -2)
x = -1/2

Put x back into   (1)

- 6(-1/2) + 3y = 3

make Y the subject of the formula
3y  + 3 = 3

3y = 3-3

y = 0/3

y = 0

Since y=0 and x = -1/2, we can state that there is only one solution.

4)

3y - 6x =-3 ......(1)

4x - 2y = - 2  ......(2)

To solve my elimination, multiply the first equation by 2,and multiply the second equation by 3.

Equation 1 is in the correct ax + by format.

Equation 2 is in the correct ax + by format.

Step 1 - Multiply Equation 1 by 2:

2 * (3y-6x=-3) --> 6y - 12x = -6

Step 2 - Multiply Equation 2 by -3:

-3 * (4x-2y=-2) --> 6y - 12x = 6

Thus: Adding the results, we have

6y - 12x = -6

+

6y - 12x = 6

12y = 0

y = 0/12

y = 0

Thus, there is no solution for this system of equations.

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Answer:

AB= 7.45

Anwer C)

Step-by-step explanation:

Cos (angle) = Nearest side / Huypothenuse

Cos(20)      = 7 / AB

Cos(20) * AB = (7 /AB) * AB

Cos (20) * AB = 7

(Cos(20) *AB) / Cos(20) = 7 / Cos(20)

AB = 7 / cos(20)

AB=    7.45

Answer:

Answer: -3/2

Step-by-step explanation:

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Answer:

7 in 1/2 for Y and 6 in 1/2 for X

Step-by-step explanation:

you can not go up nine so split it in half and add them on to X Y

and PS I am in 7th grade I tried my best and do you want to be friends ? my name is Ayden Hickle.

Answer:

None

Step-by-step explanation:

Truly, I'm not sure what type of problem this is, but most people don't favor all the seasons. If there is more to the problem, I would be glad to help further.

Answer:

One possible way to estimate how many people out of 20 would say that they like all seasons is to use a simple random sample. A simple random sample is a subset of a population that is selected in such a way that every member of the population has an equal chance of being included. For example, one could use a random number generator to assign a number from 1 to 20 to each person in the population, and then select the first 20 numbers that appear. The sample would then consist of the people who have those numbers.

Using a simple random sample, one could ask each person in the sample whether they like all seasons or not, and then calculate the proportion of positive responses. This proportion is an estimate of the true proportion of people in the population who like all seasons. However, this estimate is not exact, and it may vary depending on the sample that is selected. To measure the uncertainty of the estimate, one could use a confidence interval. A confidence interval is a range of values that is likely to contain the true proportion with a certain level of confidence. For example, a 95% confidence interval means that if the sampling procedure was repeated many times, 95% of the intervals would contain the true proportion.

One way to construct a confidence interval for a proportion is to use the formula:

p ± z * sqrt(p * (1 - p) / n)

where p is the sample proportion, z is a critical value that depends on the level of confidence, and n is the sample size. For a 95% confidence interval, z is approximately 1.96. For example, if out of 20 people in the sample, 12 said that they like all seasons, then the sample proportion is 0.6, and the confidence interval is:

0.6 ± 1.96 * sqrt(0.6 * (1 - 0.6) / 20)

which simplifies to:

0.6 ± 0.22

or:

(0.38, 0.82)

This means that we are 95% confident that the true proportion of people who like all seasons in the population is between 0.38 and 0.82. Therefore, based on this sample and this confidence interval, we would expect between 8 and 16 people out of 20 to say that they like all seasons in the population.

MARK AS BRAINLIEST!!!

answer:

$0.02

-- let me know if you have any questions regarding this.

Answer:

The probability that at least one of the children get the disease from their mother is 0.7125.

Step-by-step explanation:

We are given that a human gene carries a certain disease from the mother to the child with a probability rate of 34%.

Suppose a female carrier of the gene has three children. Assume that the infections of the three children are independent of one another.

Let Probability that children get the disease from their mother = P(A) = 0.34

SO, Complement of the event "At least one of the children get the disease from their mother"= P(A') = 1 - P(A)

where A' = event that children do not get the disease from mother.

So, P(A') = 1 - P(A) = 1 - 0.34 = 0.66

Now, probability that at least one of the children get the disease from their mother = 1 - Probability that none of the three children get disease from their mother

                     = 1 - P(X = 0)

                     = 1 - (0.66 \(\times\) 0.66 \(\times\) 0.66)

                     = 1 - 0.2875 = 0.7125

The total cost of rents is $180.

In the given table,

The cost of skis per day  = $48

The cost of pole per day = $12

Now since given that,

Alveres rents for 3 days

Therefore,

The cost of skis for 3 days  = $48 x 3

                                             =  $144

The cost of pole for 3 days = $12 x 3

                                             = $36

To find the total cost of rental,

Adding the cost of 3 days of skis and cost of 3 days of poles,

Hence,

Total cost of rents = $144 + $36

                               = $180

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Answer: $200

Step-by-step explanation: $200=100% so then $200-20%=$180=80%

Answer:

9005

Step-by-step explanation:

180$ divided by 20% is 900$  

Answer:

2.83333333333

Step-by-step explanation:

(3 2/5) / (1 1/5) = 2.83333333333

Answer:

85/30 or 2.833333333

Step-by-step explanation:

When dividing fractions, you must find the reciprocal of the second number and multiply it as usual.

It is also much easier to solve after you convert these numbers to improper fractions.

In this case,

3 2/5 = 17/5

1 1/5 = 6/5

17/5 ÷ 6/5

17/5 x 5/6

85/30 (17/6 reduced)

or

2.83333333333333333333

Answer:

3.357 (idk how your teacher wants u to round)

Step-by-step explanation:

I plugged in 51 so the equation looked like this:

\(14x+4=51\)

then solve by subtracting 4 from the equation and from the answer so it changes to:

\(14x=47\)

then divide 14 from both sides and you get:

\(x= 3.35714286\)

the p-value for this alternative hypothesis is 0.054

The p-value is the probability of obtaining a test statistic as extreme or more extreme than the one observed, assuming that the null hypothesis is true. In this case, the null hypothesis is that there is no difference in consumer satisfaction ratings between luxury and economy cars. The alternative hypothesis is that the satisfaction ratings for luxury cars are lower than those for economy cars.

Using the given t-value of 1.99 and degrees of freedom of 37, we can calculate the p-value using the t-distribution calculator. The p-value obtained is 0.0554, which is larger than the commonly used significance level of 0.05. This means that we do not have sufficient evidence to reject the null hypothesis and conclude that there is a significant difference in consumer satisfaction ratings between luxury and economy cars. Therefore, the correct answer is (c) 0.054.

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Answer:

For B thru F these options will vary but here how you do it

B. Step 1 Draw the 4 Quadrants.

Then Draw the Triangle in the lower right quadrant which we call quadrant 4. Label the X axis as Adjacent and positive. Label the Y axis as Opposite and negative. Label the Slanted side as the hypotune and AS POSITVE SINCE HYPOTENUSE IS ALWAYS POSITIVE.

FOR C. IN QUADRANT 2, PLOT A POINT AT 0,12 AND AT (-5,0). CONNECT THE DOTS AND IT FORMS A TRIANGLE. Label the X axis as adjacent and negative and the y axis as positve and opposite and label the slanted side hypotunese and positive.

FOR D Draw a straight line along the x axis then draw a slanted line passing through (5,-1). In between them put the theta symbol in there.

The labeling is the same for C.

For E. Since tan must be positve and secant must be positve, our triangle must be in the 1st Quadrant. Draw any right triangle as long it is in the first quadrant

The x axis is adjacent and positve. The y axis is opposite and positve. The hypotenuse is the slanted side and it is positve.

For F. Since sin is negative and cos is positve the triangle is in the 4th quadrant. Draw any triangle in the 4th quadrant and the labeling is the same for Problem B.

2. We can find the sec of cos by flipping cosine.

\( \cos( \frac{x}{y} ) = \sec( \frac{y}{x} ) \)

\( \cos( \frac{1}{2} ) = \sec(2 ) \)

Sec is 2.

To find the cotangent, first let find the sin then tan.

We can use the identity

\( \cos( {theta}^{2} ) + \sin( {theta}^{2} ) = 1\)

Let plug in the number

\( \cos( \frac{ {1}^{2} }{{2}^{2} } ) + \sin(x {}^{2} ) = 1\)

\( \cos( \frac{1}{4} ) + \sin(x {}^{2} ) = 1\)

\( \sin(x {}^{2} ) = 1 - \frac{1}{4} \)

\( \sin(x {}^{2} ) = \frac{3}{4} \)

\( \sin(x) = \frac{ \sqrt{3} }{ \sqrt{4} } \)

\( \sin(x) = \frac{ \sqrt{3} }{2} \)

Since sin is negative, sin x=

\( - \frac{ \sqrt{3} }{2} \)

Now let apply the formula

\( \frac{ \sin(x) }{ \cos(x) } = \tan(x) \)

\( \frac{ \frac{ - \sqrt{3} }{2} }{ \frac{1}{2} } = \tan(x) \)

\( - \sqrt{3} \)

Now let find cotangent we can the reciprocal of

tan.

\( \tan= - \sqrt{3} \)

\( \cot = - \frac{1}{ \sqrt{3} } \)

Rationalize denominator

\( \frac{ - 1}{ \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{ \sqrt -{ 3} }{3} \)

cotangent equal

\( - \frac{ \sqrt{ 3} }{3} \)

Answer:

7 hours and 15 minutes

Step-by-step explanation:

8 - 3/4 = 7 1/4 hours

Answer:

The answer is 5:6 if you need to simply then it would be 10:12

Step-by-step explanation

Hope this helps!

Answer:

5:6 10:12

Step-by-step explanation:

5:6 10:12

The Division of the sum of (7/8), (15/4), and (1/12) by their multiplication is (2712/168).

To find the division of the sum of (7/8), (15/4), and (1/12) by their multiplication, we first need to calculate the sum and multiplication of the given fractions.

The sum of the fractions is:

(7/8) + (15/4) + (1/12)

To add these fractions, we need a common denominator. The least common multiple of 8, 4, and 12 is 24. Let's convert each fraction to have a denominator of 24:

(7/8) = (21/24)

(15/4) = (90/24)

(1/12) = (2/24)

Now we can add the fractions:

(21/24) + (90/24) + (2/24) = (113/24)

The multiplication of the fractions is:

(7/8) * (15/4) * (1/12)

To multiply fractions, we multiply the numerators and denominators:

(7*15*1) / (8*4*12) = (7/96)

Now we can divide the sum of the fractions by their multiplication:

(113/24) / (7/96)

To divide fractions, we multiply the first fraction by the reciprocal of the second fraction:

(113/24) * (96/7) = (2712/168)

Therefore, the division of the sum of (7/8), (15/4), and (1/12) by their multiplication is (2712/168).

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Answer:

a = 0.9

Step-by-step explanation:

For the quadratic equation \(\boxed{ax^2 + bx + c = 0}\) to have exactly one real root, the value of its discriminant, \(\boxed{b^2 - 4ac}\), must be zero.

For the given equation:

\(y = ax^2 - 6x + 10\),

• a = a

• b = -6

• c = 10.

Substituting these values into the formula for discriminant, we get:

\((-6)^2 - 4(a)(10) = 0\)

⇒ \(36 - 40a = 0\)

⇒ \(36 = 40a\)

⇒ \(a = \frac{36}{40}\)

⇒ \(a = \bf 0.9\)

Therefore the value of a is 0.9 when the given quadratic has exactly one root.

The axis of symmetry is at x = 1, the domain is (-∞, +∞), the y-intercept c is at 7 and x intercept is not applying .

A parabolic function is one that satisfies the formula f(x) = ax2 + bx + c and, when represented graphically in two dimensions, has the shape of a parabola. Any quadratic equation with just a second degree in x is the equation for a parabolic function.

The following characteristics define a basic parabola:

Thus, from the given graph the value are obtained as:

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Answer:A

Step-by-step explanation:

To find the rate of decay, we need to use the formula A(t) = P(0.82)^t, where A(t) is the amount after t years, P is the initial amount, and 0.82 is the decay factor.

The decay factor is equal to 1 minus the decay rate, so we can solve for the decay rate as follows:

0.82 = 1 - r

r = 1 - 0.82

r = 0.18

Therefore, the rate of decay is 18%, which corresponds to answer choice A.

Answer:

A

Step-by-step explanation:

The sinusoidal expression of the function is D(t) = -cos(3t)

A sinusoidal alternating current can be represented by the equation i = I sin ωt, where i is the current at time t and I the maximum current. In a similar way we can write for a sinusoidal alternating voltage v = V sin ωt, where v is the voltage at time t and V the maximum voltage.

here, we have to,

to determine the sinusoidal expression:

When he pushes off, he is 1 m behind the center.

This means that:

Amplitude, a = 1.

But we use, a = -1 because he is behind

The graph has a minimum point at (0,-1) and then intersects its midline at (π/6, 0).

So, the period B is: 2π/B = 4 * π/6 and the vertical shift (d) is 0

Simplify 2π/B = 4 * π/6

2π/B = 2π/3

By comparison, we have:

B = 3

The function is given as:

a cos(Bt) + d

Substitute the calculated values

D(t) = -cos(3t)

Hence, the sinusoidal expression of the function is D(t) = -cos(3t)

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Answer:

period and he completes a swing in ten seconds

Answer:

D

Step-by-step explanation:

Answer:

maybe u should have paid attention in class buddy

Step-by-step explanation:

L

The total price of the vehicle would be $18,192.88.

The total deferred price of the car would be $11,191.60.

The length of the financing agreement is 68 months .

The total deferred price after the payments was $19,601.84.

The monthly payments would be $516.92.

Subtotal = Base price + Options + Destination charges

Subtotal = $14,500 + $982 + $592 = $16,074

Dealer preparation = 5% of subtotal

Dealer preparation = 0.05 x $16,074 = $803.70

Sales tax = 7% of subtotal

Sales tax = 0.07 x $16,074 = $1,125.18

Total price = Subtotal + Dealer preparation + Sales tax + Tag fee + Title fee

Total price = $16,074 + $803.70 + $1,125.18 + $145 + $45 = $18,192.88

Tax = 8% of selling price = 0.08 x $8,850 = $708

Tag fee = $130

Title fee = $35

Total amount financed = Amount financed + Tax + Tag fee + Title fee = $7,350 + $708 + $130 + $35 = $8,223

Annual interest rate = 9.5%

Number of years financed = 3

Total finance charges = $8,223 x 0.095 x 3 = $2,341.595

Total financed amount = $8,223 + $2,341.595 = $10,564.595

Monthly payments = Total financed amount / (Number of years financed x 12 months) = $10,564.595 / (3 x 12) = $293.4615

Total deferred price = Selling price + Total finance charges = $8,850 + $2,341.595 = $11,191.595

Total deferred price = $28,000

Down payment = $2,100

Total amount financed = Total deferred price - Down payment = $28,000 - $2,100 = $25,900

Monthly payments = $380

Number of months = Total amount financed / Monthly payments = $25,900 / $380 = 68.16

The financing agreement is approximately 68 months long.

Sticker price = $19,200

Discount = 6% of sticker price = 0.06 x $19,200 = $1,152

Selling price = Sticker price - Discount = $19,200 - $1,152 = $18,048

Sales tax = 8% of selling price = 0.08 x $18,048 = $1,443.84

Total price = Selling price + Sales tax + Tag fee + Title fee = $18,048 + $1,443.84 + $65 + $45 = $19,601.84

Using the formula for monthly payments on a loan:

P = (PV x r x (1 + r)^ n) / ((1 + r) ^ n - 1)

= ($26,515.80 x 0.005265 x (1 + 0.005265) ^ 60 ) / ((1 + 0.005265) ^ 60 - 1) = $516.92

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Answer: follow this you'll be able to solve it

Step-by-step explanation: mean = 98.11F

standard deviation = 0.56F

99.79 – 98.11 = 1.68 = 3 standard deviations

96.43 – 98.11 = –1.68 = –3 standard deviations

96.43F and ​99.79F are 3 standard deviations from the mean 98.11F.

By the empirical rule we know that 99.7% of the data lies within 3 standard deviation of the mean.

Approximately 68% of healthy adults in this group have body temperatures within 1 standard of the​ mean, or between 97.55F and 98.67F.

Answer:

A is the answer

Step-by-step explanation:

if its wrong than its C

The statement which is not true about the circle M is ∆ABM is isosceles.

The correct answer choice is option 2.

Based on the circle M;

diameter AC,

chords AB and BC,

radius MB

Isosceles triangle: This is a type of triangle which has two equal sides and angles.

Equilateral triangle is a triangle which has three equal sides and angles.

Hence, ∆ABM is equilateral triangle.

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Answer:

68% of the data points lie between 10 and 18.

Step-by-step explanation:

one standard deviation to left of mean = 14 - 4 =10

one standard deviation to right of mean = 14 + 4 = 18

68% of data is in this region.

so the answer is 68% of the data points lie between 10 and 18.

Given: The radius of a cylindrical water tank is 6.5 ft, and its height is 9 ft.

Required: To determine the volume of the tank.

Explanation: The volume of a cylinder of height h and radius r is-

Here we have,

Hence, the volume of the tank is-

Further simplifying as-

Final Answer: The volume of the tank is 1194 cubic ft.

B) dx/dt=-2dy/dt is the relation of the rate of change for the conditon given in the question.

Rate of change is a measure of how quickly a variable is changing. It is often represented by the symbol "d/dt" or "∆y/∆x" and is calculated by finding the ratio of the change in one variable to the change in another variable.

Given :

x + 2y =k

where k is a constant

differentiating above equation with respect to time we get

=> dx/dt + 2dy/dt =dk/dt

=> dx/dt + 2dy/dt =0

=> dx/dt = -2dy/dt

so Option B) dx/dt=-2dy/dt is correct option for the above problem

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