What is the solution of the system? Use elimination.
3x +9y=33
-10x-6y=-14
a. (-4,5)
b. (4,-1)
c. (-10, 3)
d. (-1,4)

The amount invested in the account that earns 8% interest is $6500

The amount invested in the account that earns 12% interest is $8500

a + b = $15,000 equation 1

0.08a + 0.12b = $1540 equation 2

Where:

a = amount invested in the account that earns 8% interest

b = amount invested in the account that earns 12% interest

The elimination method would be used to determine the required values:

Multiply equation 1 by 0.08

0.08a + 0.08b = 1200 equation 3

Subtract equation 3 from equation 2

0.04b = 340

Divide both sides of the equation by 0.04

b = 340 / 0.04

b = $8500

a + 8500 = 15,000

a = $15,000 - $8,500

a = $6500

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Answer:

-6/6 or -1

Step-by-step explanation:

To find the equation of the line (or the slope, assuming that's what equation means, ) we need to write the formula Y1-Y2/X1-X2

So, we need to fill in the numbers, which gives us the fraction -6-0/-2-(-8)

When we solve for the numerator (-6-0), we get -6.

When we solve for the denominator (-2 - {-8}), we get 6.

So, we have -6/6, which, when simplified, is -1.

(If the problem is not asking for slope when it says equation, then sorry!)

Answer: -64

Step-by-step explanation:

To solve this equation, you need to isolate the b term on one side of the equation. You can do this by dividing both sides of the equation by 16. This will give you:

b/16 = (-4)

You can then divide both sides of the equation by -4 to get:

b/16 = -4

b/16 * -4 = -4 * -4

b = -64

Therefore, the solution to the equation is b = -64.

The equation of the line that is perpendicular to the line that passes through the points (-1, -4) and (4, 2): D. 5x + 6y = 27.

Perpendicular lines have slopes with a product of -1, or are negative reciprocals.

First find the slope of the line that passes through (-1, -4) and (4, 2):

Slope (m) = change in y / change in x = (2 -(-4)) / (4 -(-1))

m = 6/5

The negative reciprocal of 6/5 is -5/6. This means that the perpendicular line is, m = -5/6.

To write the equation of the line that is perpendicular to the given line, substitute m = -5/6 and (a, b) = (-3, 7) into y - b = m(x - a):

y - 7 = -5/6(x - (-3))

y - 7 = -5/6(x + 3)

6(y - 7) = -5(x + 3)

6y - 42 = -5x - 15

6y = -5x - 15 + 42

6y = -5x + 27

5x + 6y = 27

The answer is: D. 5x + 6y = 27.

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Answer:

52 is range

Step-by-step explanation:

Range is the 'y' values the function can have

 from 0 to 10 books would give a range of 0 - 52

Domain is the x-values  0, 1,2,3,4,56,7,8,9,10

    discrete, because you cannot have anything but the whole numbers listed for the values of 'x'

Answer:

The domain is the input.  It is the number of books.  You can have 0-10 books.  These would be the domains.  

The range is the outputs.  The outputs can be from 0 to 52 pounds.

The domain is discrete.  The domain is the number of books.  We cannot have half or a book or 3/4 of a book.  So this will be discrete.  The number of books can only be whole numbers up to 10.

Step-by-step explanation:

The expression of (a + b + c) is equivalent to 16.5.

Function : In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the set Y is called the codomain of the function

Expression : A mathematical expression is made up of terms (constants and variables) separated by mathematical operators

Equation : A mathematical equation is used to equate two expressions.

Given are two circles intersecting at each others centers at D and E.

We can write the area of the common region as -

[A] = 4 x {(θ/180) x (πr²/2) - (1/2)r²sinθcosθ}

Now, we can write θ as -

cos(θ) = (3/6) = 1/2

θ = 60°

[A] = 4 x {(60/180) x (π(6)²/2) - (1/2)(6)²sin(60)cos(60)}

[A] = 4 x {(1/3 x 36π/2 - (1/2) x 36 x [tex]\sqrt{\frac{3}{2} }[/tex] x 1/2}

[A] = 4 x {6π - 9 [tex]\sqrt{\frac{3}{2} }[/tex] }

[A] = 24π + (-  9 [tex]\sqrt{\frac{3}{2} }[/tex])

So, on comparing, with the expression below -

aπ + b[tex]\sqrt{c}[/tex]

We get -

a = 24

b = - 9

c = 3/2

So, we get -

a + b + c

24 - 9 + 3/2

24 - 9 + 1.5

24 - 7.5

16.5

Therefore, the expression of (a + b + c) is equivalent to 16.5.

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There are several reasons why researchers might not use the normal distribution to model real data which are due to assumptions of normal distribution.

First, the normal distribution assumes that the data is symmetric and is distributed around the mean. However, in some cases, the data may be skewed, making the normal distribution an inappropriate model.

Second, the normal distribution assumes that the data is homoscedastic, meaning that the variance is constant across the sample. However, in some cases, the variance may be heteroscedastic, meaning that the variance changes across the sample. This makes the normal distribution an inappropriate model for this type of data.

One situation in which researchers should not use the normal distribution approximation is when modeling financial data. Financial data often follows a power-law distribution, which is not normal. Therefore, researchers should use a power-law distribution to model this type of data.

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The following choices are binomial random variables: A. Take a random sample of 30 tours and let L = the number of tours that result in a sale. B. Take a random sample of 3 tours and let K = the number of tours that result in a sale.

Choice A is a binomial random variable because it represents the number of tours that result in a sale in a random sample of 30 tours. The trials are independent, as the results of one tour do not affect the results of other tours, and the probability of success (a sale) is constant at 5%.

Choice B is also a binomial random variable because it represents the number of tours that result in a sale in a random sample of 3 tours. The trials are independent and the probability of success is constant at 5%.

Choice C is not a binomial random variable because it represents the number of sales generated by a random sample of 3 tours, which is a continuous variable. Binomial random variables are always discrete, as they represent the number of successes in a sequence of trials.

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The total area of the figure is equal to 192 square meters. The correct option is A.

The space occupied by any two-dimensional figure in a plane is called the area. The space occupied by the rectangle in a two-dimensional plane is called the area of the rectangle.

Calculate the area of the rectangle by the formula written below,

Area of the rectangle = L x W

Area of the rectangle = 8 x 18

Area of the rectangle = 144 square meters

The area of the triangle will be calculated by the formula written as,

Area of triangle = 1/2 x B x H

Area of triangle = 1/2 x ( 18 - 6 ) x 8

Area of triangle = 1 / 2 x 12 x 8

Area of triangle = 48 square meters

Total area = 144 + 48

Total area = 192 square meters

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From the values that we have here, the statement that can be said to be true here would be that: There is no constant relationship between the number of video games collected by Cooper and Maria. Last option

A relationship with a fixed ratio between two quantities is referred to as proportionate. The graph will therefore be linear, or straight.

When two variables are directly or indirectly proportional to one another, their relationship can be expressed using the formulas y = kx or y = k/x, where k specifies the degree of correspondence between the two variables. The proportionality constant, k, is often used.

The values between these two does not show any constant relationship hence the last option

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Answer: part a

cooper- 35 45 55 65

maria 15 23 31 39

part B

there is no constant relationship between the number of video games collected by coopeer and maria

Step-by-step explanation:

The value of x in the inequality, -13x < 65, is simplified as, x > 5.

Any inequality given can be solved by find the value of the variable in the inequality, which will make it a true statement. To do this, isolate the given variable to make it stand alone on one side.

Given the inequality, -13x < 65, solve as shown below:

-13x < 65 [given]

Divide both sides by -13:

-13x/-13 < 65/-13

x > -65/13 {the sign changes from < to > because we divided both sides by a negative quantity]

x > 5

The value of x is simplified as x > 5.

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Answer:

y=12x+20

Step-by-step explanation:

Your question and a graph of picture are different. So I just considered your question.

m= (80-44)/(5-2) = 36/3=12

(y- y_1)=m(x-x_1)

(y-44)= 12(x-2)

y-44=12x-24

y= 12x-24+44

y=12x+20

The z-test statistic is used to test the claim that the proportions of the two populations differ. A normal test statistic, the z-test statistic can also be used to measure the proportion of a single population.

Let's say that:

p1: Liberal voters' proportion of the population who smoked cannabis, p. 2:

Conservative voters' proportion of the population who smoked cannabis The null hypothesis is H 0:

The alternative hypothesis is H 0: p 1 = p 2.

p 1 p 2 P-value = 0.00001 The P-value is less than the significance level of 1%. The null hypothesis is rejected at the 1% significance level.

We can conclude that conservative voters had a lower percentage of voters who regularly smoked cannabis.

Two distinct hypotheses are tested by all analysts using a random population sample: the alternative hypothesis and the null hypothesis. Typically, the null hypothesis is a hypothesis that all population parameters are equal; For instance, a null hypothesis might assert that the population mean return is zero.

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The value of the function G(-5 + h) - G(-5) in the simplest form -5h.

Function is a combination of different types of variable and constants in which for the different values of x the value of function y is unique.

The given function is,

G(t) = 9 - 5t            (1)

To find the value of expression G(-5 + h) - G(-5),

First, find the value of G(-5 +h) by substituting t = -5+h in equation (1),

G(-5 + h) = 9 - 5(-5 + h)

               = 9 +25 -5h

               = 34 - 5h

The value of G(-5)

G(-5) = 9 - 5(-5)

        = 9 + 25

        = 34

The required value,

G(-5 + h) - G(-5) = 34 - 5h - 34 = -5h.

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Answer:No

Step-by-step explanation:

When we substitute x=6 into the first equation we get

y=1/6 *6+5=6 so we get (6, 6)

When we substitute x=6 into the second equation we get

y=5/6*6+3=8  so we get (6, 8) . it works for the second equation but not the first. It must be true for both equations

Answer:

75.5

Step-by-step explanation:

Answer:

Therefore, the area of the triangle with vertices at A(2, 2), B(4, 5), and C(7, 5) is approximately 4.5, to the nearest tenth.

Step-by-step explanation:

To find the area of a triangle with vertices at A(2, 2), B(4, 5), and C(7, 5), you can use the Shoelace Theorem.

The Shoelace Theorem states that the area of a polygon with vertices (x1, y1), (x2, y2), ..., (xn, yn) is given by the following formula:

A = 1/2 * |(x1y2 + x2y3 + ... + xn-1yn + xny1) - (y1x2 + y2x3 + ... + yn-1xn + ynx1)|

To apply the Shoelace Theorem to a triangle with vertices at A(2, 2), B(4, 5), and C(7, 5), you can plug in the coordinates of these vertices into the formula:

A = 1/2 * |(25 + 45 + 72) - (24 + 57 + 52)|

= 1/2 * |(10 + 20 + 14) - (8 + 35 + 10)|

= 1/2 * |44 - 53|

= 1/2 * |-9|

= 1/2 * 9

= 4.5

Answer:

3/2 or 1.5 or 1 1/2 in mix number

Answer:

p=8h

Step-by-step explanation:

P is the total pay, so it will be on one side of the equation. 8 represents the fact that Trey receives 8 dollars per hour. It's multiplied by h to represent the number of hours he works.

Therease should take her 7th dose on Friday at 9:00AM

What is time ?

Time can be described in mathematics as an ongoing and continuous series of events that take place one after another, from the past through the present, and into the future. The duration of events or the gaps between them can be measured, compared, or even ordered using time.

Time is the ongoing progression of existence and things that happen in what seems to be an irrevocable order from the past, present, and forward into the future.

Time is defined by physicists as the flow of events from the past through the present and into the future. In essence, a system is timeless if it is unchanging. When describing events that take place in three-dimensional space, time can be thought of as the fourth dimension of reality.

The doctor told her to take a dose of 4.8 ml every 12 hours for 7 days.

If Theresa took her first dose at 9:00 AM on Monday,

Simply add 12 hours every time up to the 7th dose,

First dose  ----> 9:00 AM on Monday,

Second dose  ----> 9:00 PM on Monday,

Third dose  ----> 9:00 AM on Tuesday,

Fourth dose  ----> 9:00 PM on Tuesday,

Fifth dose  ----> 9:00 AM on Thursday,

Sixth dose  ----> 9:00 PM on Thursday,

Seventh dose  ----> 9:00 AM on Friday,

Hence, Theresa should take her 7th dose at 9:00 AM on Friday.

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The correct answer is option D. 1/35. To count the number of rectangles that can be formed, we need to consider the two cases where the diagonals of the rectangle are parallel to the sides of the octagon, and where the diagonals are perpendicular to the sides of the octagon.

In the first case, there are four choices for which side the diagonals are parallel to, and once that side is chosen, there are two choices for which pair of vertices lie on that side. Therefore, there are $4 \cdot 2 = 8$ rectangles of this type.

In the second case, there are four choices for which vertex the diagonals intersect, and once that vertex is chosen, there are two choices for which pair of vertices lie on the same side of the intersection point as the chosen vertex. Therefore, there are $4 \cdot 2 = 8$ rectangles of this type.

Altogether, there are $8 + 8 = 16$ rectangles. Therefore, the probability that the quadrilateral formed by the four vertices is a rectangle is

                               = \frac{1}{{8 \choose 4}/16}

                               = \frac{1}{{8 \choose 4}/2^4}

                               = \frac{1}{{8 \choose 4}/2^4}

                               = \boxed{\text{(D) } 1/35}$.

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Answer:

The inverse function of the exponential function f(x) = a^x is the logarithmic function with base a.

The inverse function of a function f is a function that "undoes" the original function, meaning that it reverses the transformation applied by the original function. In the case of the exponential function, the inverse function is the logarithmic function, which "undoes" the transformation applied by the exponential function.

For example, suppose we have the exponential function f(x) = 2^x. The inverse function of this function is the logarithmic function with base 2, which is written as y = log_2 x. If we apply the inverse function to 2^x, we get:

y = log_2 (2^x)

Solving for x gives:

x = 2^y

This means that the inverse function of the exponential function f(x) = a^x is the logarithmic function with base a, which is written as y = log_a x.

The other options (a. transcendental, c. rational, d. polynomial, e. algebraic) are not correct, since they do not describe the inverse function of the exponential function.

Answer:

b. logarithmic

Step-by-step explanation:

Given exponential function:

[tex]f(x)=a^x[/tex]

The inverse of the given function is the logarithmic function with base a.  

To find the inverse of a function, replace f(x) with y:

[tex]\implies y=a^x[/tex]

Swap the x and y:

[tex]\implies x=a^y[/tex]

Take logs with base a of both sides of the equation:

[tex]\implies \log_ax=\log_aa^y[/tex]

Apply the log power law:  logₐ xⁿ = n logₐ x

[tex]\implies \log_ax=y\log_aa[/tex]

Apply the log law:  logₐ a = 1

[tex]\implies \log_ax=y[/tex]

[tex]\implies y=\log_ax[/tex]

Replace y with f⁻¹(x):

[tex]\implies f^{-1}(x)=\log_ax[/tex]

Thus proving that the inverse of the exponential function f(x) = aˣ is the logarithmic function with base a.            

1.  The average difference between the two values on the two stacks of cards is expected to be about 0 minutes best describes the outcome of the randomization test.

This randomization test was conducted to test whether the average difference of 32 minutes between the two groups could be attributed to chance. The test essentially involved shuffling the index cards containing the minutes slept by each subject and then dealing them into two equal-sized groups.

This process allows for a fair comparison between the two groups and ensures that any differences in the average minutes slept are due to chance. Since the cards are shuffled randomly, the average difference between the two stacks of cards is expected to be about 0 minutes.

If meditation is effective, then the difference between the values on the two stacks of cards would be expected to be more than 32 minutes.

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Answer:

  the product of 6 and 23 is more than 126

Step-by-step explanation:

You want to know how to tell that 6 is too high an estimate for the first digit of the quotient of 126 and 23.

When the trial quotient value of 6 is multiplied by the actual divisor of 23, we are computing 6(20 +3) = 120 +18. This is more than 126, so the trial quotient value is too large.

__

Additional comment

Another way to tell is to consider the dual problem that 120/20 = 6 represents: 120/6 = 20. It is easy to see that 126/6 = 21, so we know that a divisor of 23 (larger than 21) will give a quotient less than 6.

Two members of the maths competition team solve 13 problems in 1 hour.

Person=13

Time=1 hour

Then.

Rate=13/1 (person/time)

With the help of question,

Let us consider,

x team members are needed to solve in 1 hour 39 problems,

2M×1/13=1×xM/39

2M/13=x M/39

2M=x M/13

M=26

26 team members are needed to solve in 1 hour 39 problems,

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w=9/2 =4,5

Step-by-step:

:)

Answer:

since 12inches=1foot

x inches=34feet

34feet converted to inches =408inches

total inches=408+8

T=416inches

dividing 416 by 8 we have

52 inches left

converting back to feet we get

4ft 4in

The coordinates of reflection image are (-1, -2).

What is point reflection?

A particular kind of Euclidean space isometry is known as a point reflection in geometry. A thing is said to have point symmetry if it is invariant under a point reflection; if it is invariant under a point reflection through its center, it is said to have central symmetry or to be centrally symmetric.

Given:

point Q is reflected across x = 1.

From graph the point Q is (3, -2).

We have to find the coordinates of its reflection image.

x = 1 is a vertical line passing through all points with an x- coordinate of 1.

(3, - 2) is 2 units to the right of x = 1 ( 3 - 1 ), thus

The reflection is 2 units to the left of x = 1 ( 1 - 2 = - 1 )

Q(3, - 2 ) → Q'(- 1, - 2 )

This is because the x-coordinate goes 2 units left to the line x = 1 and the y-coordinate remains the same.

Hence, the coordinates of reflection image are (-1, -2).

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Answer:

  k = -7/2

Step-by-step explanation:

You want the k-value so that the point (1, -k) is on the line kx+3y=7.

The point will be on the line when its coordinates make the equation true. Using (x, y) = (1, -k), we have ...

  k(1) +3(-k) = 7

  -2k = 7 . . . . . . . . simplify

  k = -7/2 . . . . . . . divide by -2

The value of k = [tex]\frac{-7}{2}[/tex] so the point is on the line kx+3y=7

A line is an endlessly long object without breadth, depth, or curvature in geometry. Thus, despite the fact that they can exist in two, three, or higher dimensional environments, lines are one-dimensional things. The term "line" can also refer to a line segment that has two locations that serve as its ends in daily life.

given

the point of the line = ( 1 ,-k )

the line = kx + 3y = 7

the coordinates make the equation true when its points are on the line

so putting the values of x and y in equation of line

k( 1 ) + 3 ( -k ) = 7

k - 3k = 7

-2k = 7

k = [tex]\frac{-7}{2}[/tex]

The value of k = [tex]\frac{-7}{2}[/tex] so the point is on the line kx+3y=7

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