HW. Solve system of eq. 1. \[ \begin{array}{r} 3 x-6 y=5 \quad 2 . \\ 2 x-y=4 \\ \text { 3. } 4 x-2 y=5 \\ 2 x-y=11 \end{array} \] \[ \text { 2. } x-3 y=8 \] \[ 2 x-6 y=16 \]

Answer:

y(x)=2*(x+-2)^2+5

Step-by-step explanation:

x1 = -2, x2 = 1, and x3 = 5.5

This system of equations can be solved by first combining the equations and then isolating one of the variables. To combine the equations, subtract the first equation from the second equation:

4x1 + 5x2 + 5x3 = 9

- (x1 + x2 + 3x3 = -4)

3x1 + 4x2 + 2x3 = 13

Next, isolate one of the variables. In this case, let's isolate x3:

3x1 + 4x2 + 2x3 = 13

- (2x3) - (-2x3) = 0

3x1 + 4x2 = 13

x3 = \frac{13 - (3x1 + 4x2)}{2}

Now that x3 has been isolated, substitute it into one of the original equations and solve for the remaining two variables:

x3 = \frac{13 - (3x1 + 4x2)}{2}

x1 + x2 + 3\left(\frac{13 - (3x1 + 4x2)}{2}\right) = -4

Solve for x2:

x2 = \frac{-4 - x1 - 3\left(\frac{13 - (3x1 + 4x2)}{2}\right)}{4}

Substitute this expression for x2 into one of the original equations and solve for x1:

x1 + \frac{-4 - x1 - 3\left(\frac{13 - (3x1 + 4x2)}{2}\right)}{4} + 3\left(\frac{13 - (3x1 + 4x2)}{2}\right) = -4

Solve for x1 and then plug this value back into the expression for x2 to find x2:

x1 = -2

x2 = 1

x3 = \frac{13 - (-2 + 4x2)}{2}

x3 = \frac{13 - (-2 + 4 \cdot 1)}{2}

x3 = \frac{13 - 2}{2}

x3 = 5.5

Therefore, the solution to the system of equations is x1 = -2, x2 = 1, and x3 = 5.5.

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Cost of 75 pound of candy = 75×6 = $450

Additional fee for each bulk = $250

Total = $700

Therefore, $700 is the correct answer.

The equation can be written as: x + 24° = 90°.

The measure of the unknown angle is 66°.

An algebraic equation is an equation that is made up of variables and constants, along with algebraic operations like addition, subtraction, square root, etc.

Let the measure of the unknown angle be x.

Since the angle in the corner measures 90° and one piece of the tile will have a measure of 24°. We can write the equation as:

x + 24° = 90°

The measure of the unknown angle can be determined as follow:

​x + 24° = 90°

x = 90° - 24°

x = 66°

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Jolina paid 33.33% more than Kendall paid for the coat, as she paid the full price while Kendall received a 25% discount.

To calculate this, first find out how much Kendall paid after the discount. If the original price of the coat was X, then Kendall paid 0.75X, since the discount was 25%. We know that Kendall paid $100 for the coat, so we can set up the equation 0.75X = 100 and solve for X. X turns out to be $133.33.

Since Jolina paid the full price of $133.33 for the coat, the ratio of what Jolina paid to what Kendall paid is:

133.33 / 100 = 4/3 or 1.33:1

Therefore, Jolina paid 33.33% more than Kendall paid for the same coat.

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Answer:

To solve for f in the equation:

f/3 + 22 = 17

We need to isolate f on one side of the equation. We can start by subtracting 22 from both sides:

f/3 = 17 - 22

Simplifying the right-hand side:

f/3 = -5

To isolate f, we can multiply both sides by 3:

f = -5 * 3

Simplifying:

f = -15

Therefore, the solution to the equation f/3 + 22 = 17 is f = -15.

To graph the function h(x) = (x - 5)² + 2, we can use transformations of the function f(x) = x².

A graph of a function is a visual representation of how the output of the function relates to its input.

First, we need to shift the graph of f(x) 5 units to the left, which can be done by subtracting 5 from x in the function:

h(x) = (x - 5)² + 2 = (x - 5)² + 2.

Then, we need to shift the graph of f(x) 2 units up, which can be done by adding 2 to the function: h(x) = (x - 5)² + 2.

Using a graphing tool, you can then plot the points of h(x) to graph it.

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The real yeild is 0.65%.

The Estimated 10-year Treasury bond yield is 3.65%.

The 10-year Treasury bond yield can be estimated using the 5-year Treasury bond yield and the expected inflation rate of 3%.

This is done by calculating the real yield, which is the difference between the nominal yield and the expected inflation rate.

The 10-year Treasury bond yield can be estimated by adding the real yield of the 5-year Treasury bond to the expected inflation rate of 3%.

Real yield = Nominal yield - Expected inflation rate

Real yield (5-year Treasury bond) = 3.65% - 3% = 0.65%

Estimated 10-year Treasury bond yield = 0.65% + 3% = 3.65%

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Therefore, 13.509 is roughly the standard deviation of the number of attendees who would favour chicken.

The degree of variation or dispersion in a set of data is measured by standard deviation. It calculates how far the data points, on average, deviate from the mean (average) of the data collection. Finding the square root of the data's variation yields the standard deviation. In statistics, the standard deviation is frequently used to characterise the distribution of data and is significant in areas like science, finance, and economics. It can be used to assess the validity of statistical data and to contrast different groups of data.

given

The following formula must be used to determine the standard deviation of attendees who would favour chicken as the main course:

σ = √(np(1-p))

When we change the numbers, we obtain:

σ = √(780 x 0.38 x 0.62) (780 x 0.38 x 0.62)

σ = √(182.616) (182.616)

σ = 13.509

Therefore, 13.509 is roughly the standard deviation of the number of attendees who would favour chicken.

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Two ratios that describe the collection of baseballs to gloves are

8:4 and 2:1 .

The ratio is defined as the comparison of two quantities of the same units that indicates how much of one quantity is present in the other quantity. Ratios can be classified into two types. One is part to part ratio and the other is part to whole ratio.

Given,

Number of gloves = 16

Number of baseballs = 8

Ratio of gloves to baseballs

= 16/8

= 8/4 = 8:4

= 2/1 = 2:1

Hence, 8:4 and 2:1 are two ratios that describe the collection of baseballs to gloves.

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Complete question is:

There are 16 baseballs and 8 gloves,

Choose two ratios that describe the collection of baseballs to gloves.

8:4, 6:4, 2:1, 2:4, 10:4

The value of x is 45 in the provided assertion, and the cointerior angles do sum up to 180°, indicating that AD and BC are parallel.

Parallel in mathematics refers to two lines which never cross one another; picture an equal symbol. Three close pals' parallel lives could be depicted in a tale.

(a)

3x + x + 2x + 90 = 360

6x = 360 - 90

6x = 270

x = 45

(b) The answer will be yes, they would be parallel.

We can justify this using co-interior angles, which state that 2 angles subtended by parallel lines add up to 180°

We can check this with both angles 3x & x, or 2x & 90°.

If AD and BC are parallel, then 3x + x = 180, and since you already found the value of x we can substitute this in:

3(45) + (45) = 180

135 + 45 = 180

180 = 180

So the co-interior angles do add up to 180°, which means that AD and BC are parallel.

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Answer: x⁴ - 9y²

Step-by-step explanation:

The area of a rectangle is length x width so...

Area = (x² + 3y)(x² - 3y)

Simplify:

Area = x⁴ + 3yx² - 3yx² - 9y²

Area = x⁴ - 9y²

Hope this helps!

The inequality for this statement is "x - 5 > 22". So, the solution to this inequality is "x > 27".

To translate the given statement into an inequality, we need to identify the variable, the constant, and the inequality sign. The variable is the unknown number, which we can represent with x. The constant is the number 22, and the inequality sign is greater than (>).

So, the inequality can be written as:
x - 5 > 22

To solve for x, we need to isolate the variable on one side of the inequality. We can do this by adding 5 to both sides of the inequality:
x - 5 + 5 > 22 + 5

Simplifying gives:
x > 27

So, the solution to the inequality is x > 27. This means that any number greater than 27 will make the inequality true.

In conclusion, the inequality that represents the statement "Five subtracted from a number is greater than twenty-two" is x > 27.

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Answer:

1)  12<x<15 is:   f(x) = -5(x-12)^2 + 80

2) 15<x<17 is:    f(x) = 35

3) 27<x<30 is:  f(x) = 2.5x-22.5

Step-by-step explanation:

See the attached image.

1)  Plot all the lines as shown

2)  Add the inequalities, which will produce the colored regions on DESMOS.

3)  Assume that the function having the greatest value in each region is the function that determines the roller coaster's height  (My assumption - it is not clear in the problem which function should dominate)

4) for the three regions listed with no corresponding function, identify the line having the greatest value.  Thiose are the functions that are noted on the graph and in the answer box above.

5) Take a break

There is only one solution when you solve the system of equations 2x+y=7 and y=-2x+7. The one solutions is (2, 3).

To find the solution, you can use the substitution method. This involves solving one equation for one variable and then substituting that expression into the other equation.

First, solve the second equation for y:
y = -2x + 7

Now, substitute this expression for y into the first equation:
2x + (-2x + 7) = 7

Simplify the equation:
2x - 2x + 7 = 7

Combine like terms:
7 = 7

This equation is always true, which means that there is only one solution for this system of equations. The solution is the point where the two lines intersect, which is (2, 3).

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Answer:

30 baskets per minute

Step-by-step explanation:

We know

Shaq shot 420 baskets in 14 minutes.

Find his basket rate in baskets per minute.

We take

420 / 14 = 30 baskets per minute

So, the answer is 30 baskets per minute.

If a regular pentagon and a regular hexagon have the same area, then the regular pentagon will have a smaller perimeter than the regular hexagon.

This is because a regular pentagon has less sides than a regular hexagon, which means that the length of each side of the pentagon will be shorter than the length of each side of the hexagon.

The hexagon would therefore have more distance to cover and more sides to be add up before one can get to the perimeter. The pentagon has three less sides than the hexagon and so would have a smaller perimeter.

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Step-by-step explanation:

red gumballs=6 blue gumballs=6

yellow gumballs=6 green gumballs=6

purple gumballs=6

total number of gumballs=30

probability of a student selecting a red gumballs

no of red gumballs 6 1

=------------------------ = ----- = -----

no of total gumballs 30 5

The amount of water each beaker would hold is x/8

From the question, we have the following parameters that can be used in our computation:

Number of beakers = 8

Represent the size with x

So, we have the following quotient expression

Size of each beaker = x/Number of beakers

Substitute the known values in the above equation, so, we have the following representation

Size of each beaker = x/8

Hence, the amount is x/8

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Yes, these expressions are equivalent expressions.

A sentence qualifies as a mathematical expression if it comprises one or more mathematical operations, at least two numbers, or variables. Let's examine the writing style of expressions. A number is 6 times larger than the other number, x, by a factor of 2. The mathematical phrase x/2 + 6 represents this claim. Complex riddles are solved using mathematical expressions.

In the given question,

Expressions are as follows:

(9g-11+10g) - (12-11g+13)

Simplifying it, we get:

30g -36

In the 2nd expression given,

-3(-10g+12) and after simplifying:

30g-36

As the expressions after simplifying are equal to each other, we can say that these are equivalent expressions.

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Answer:

Step-by-step explanation:

OK so i'm not really good at this my self but i'll try my best to help you because I don't really do it for the points I do it because I like to help other people. OK so their blocks have a scale factor of k=4.5. OK so I don't know if this is right but what I would do is there are 8 sides to any cube and you have a scale factor of k=4.5 so I would multiply 4.5 and 8 to get a answer of 36ft.

Answer:

2*(8*8*3+15*15*3)

Step-by-step explanation:

Small cube V=8*8*3

Large cube V=15*15*3

Doubled height is double of each cube V

so 2*[(8*8*3)+(15*15*3)]

The first step in finding the given operations for the functions is to substitute the expressions for f(x) and g(x) into the operations.

For the first set of functions, f(x) = x2 and g(x) = 4x − 3, we have:
(f + g)(x) = f(x) + g(x) = x2 + (4x - 3) = x2 + 4x - 3
(f - g)(x) = f(x) - g(x) = x2 - (4x - 3) = x2 - 4x + 3
(fg)(x) = f(x)g(x) = x2(4x - 3) = 4x3 - 3x2
(f/g)(x) = f(x)/g(x) = x2/(4x - 3)

For the second set of functions, f(x) = x2 + 5 and g(x) = 7 - x, we have:
(f + g)(x) = f(x) + g(x) = x2 + 5 + (7 - x) = x2 - x + 12
(f - g)(x) = f(x) - g(x) = x2 + 5 - (7 - x) = x2 + x - 2
(fg)(x) = f(x)g(x) = (x2 + 5)(7 - x) = 7x2 - x3 + 35 - 5x
(f/g)(x) = f(x)/g(x) = (x2 + 5)/(7 - x)

The given operations are:
1.) (f + g)(x) = x2 + 4x - 3, (f - g)(x) = x2 - 4x + 3, (fg)(x) = 4x3 - 3x2, (f/g)(x) = x2/(4x - 3)
2.) (f + g)(x) = x2 - x + 12, (f - g)(x) = x2 + x - 2, (fg)(x) = 7x2 - x3 + 35 - 5x, (f/g)(x) = (x2 + 5)/(7 - x)

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Answer:

fraction 3/9

percentage is 90%

Answer:

  1/3

Step-by-step explanation:

You want the difference in medians in terms of the IQR.

The IQR is the difference of the numbers at the ends of the box.

  top distribution: IQR = 12 -6 = 6

  bottom distribution: IQR = 14 -8 = 6

The median of each distribution is the location of the line in the box.

  top distribution: median = 11

  bottom distribution: median = 9

The difference in medians is 11 -9 = 2. The ratio of that to the IQR is ...

  2/6 = 1/3

The difference in medians is 1/3 times the IQR.

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The number of comic books is given as follows:

P/100 x 560.

In which P is the percentage equivalent to comic books on the circle graph.

The number comic books sold at the book fair is given by the proportions in the context of the problem.

The circle graph gives the percentage out of each type of book, hence the percentage of comic books is given as follows:

P/100.

Then the amount of comic books is obtained multiplying the percentage by the total amount of 560 as follows:

P/100 x 560.

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The correct option regarding the amount of coins is given as follows:

c 4 nickels, 10 dimes, 4 quarters

The amounts are obtained by a system of equations, for which the variables are given as follows:

Amy has 18 coins consisting of nickels, dimes, and quarters, hence:

x + y + z = 18.

She has the same amount of nickels as quarters, hence:

x = z.

Thus:

2x + y = 18

y = 18 - 2x.

She has a total of $2.20 worth of coins, hence:

0.05x + 0.1y + 0.25z = 2.2

0.3x + 0.1y = 2.2

Since y = 18 - 2x, the value of x is obtained as follows:

0.3x + 0.1(18 - 2x) = 2.2

0.1x = 0.4

x = 0.4/0.1

x = 4.

Hence the remaining values are given as follows:

Meaning that option c is correct.

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Answer:

8358 cubic ft

Step-by-step explanation: