(In 2-5, use number sense to decide where the decimal point belongs in the quotient.)

4. 4.08 divided by 6.4

5. 730.5 divided by 1.5

The x- intercept of  y = x²-4x-2 is 4.44949 and −0.44949.

The line's point of intersection with the coordinate axes is known as an intercept. The y coordinate of the intersection point is zero if the line contacts the X axis, and the intercept is known as the x intercept.

The points where a line crosses an axis are known as the x-intercept and the y-intercept, respectively.

Given:

To find the x-intercepts of the function, y = x²-4x-2, we need to make the y-value of the function equal to zero,

So, x²-4x-2 = 0

Now, solving the above Quadratic Equation

x²-4x-2 = 0

D = √(-4)² - 4(1)(-2)

D = √16 + 8

D = √24

D = 2√6

So, x= 4 ±  2√6/ 2

x = 4 +  2√6/2  or x = 4-  2√6/2

x = 2 + √6 or x = 2- √6

x = 4.44949 or x = −0.44949

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Answer:

6/7

Step-by-step explanation:

find the least common multiple of 7 and 5:

7,14,21,28,(35)

5,10,15,20,25,30,(35)

7x5=35 and 5x7=35

So multiply the denominator and numerator of 6/7 by 5, so 30/35

and multiply the denominator and numerator of 4/5 by 7, so 28/35.

30 is bigger than 28, so 30/35 is greater than 28/35.

Therefore, 6/7 is greater than 4/5

This statement is true. If a system of linear equations has two different solutions, it must have infinitely many solutions.

Linear equations are equations that involve only linear functions, or functions of the form f(x) = mx + b. These equations can be used to describe a variety of real-world phenomena, such as the motion of a particle along a straight line. Linear equations are generally solved by using the linear equation solving methods, such as substitution, elimination, and graphing. The solutions to a linear equation are the values of the variables that make the equation true.

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Answer:

2.5hrs

Step-by-step explanation:

We can start solving the problem by using the formula: distance = rate x time. If we call the time t in hours, we can write two equations:

49t = distance for the truck going south

62t = distance for the truck going north

We also know that the distance between the two trucks is the sum of the distances they have traveled, so:

distance = 49t + 62t = 111t

Now we can use the given information that the distance between the two trucks is 277.5 miles to find the value of t:

277.5 = 111t

t = 277.5 / 111

So the two trucks will be 277.5 miles apart after t = 2.5 hours.

The equation model the depth (d) of the snow n days after the storm is d(n) = 15 * (0.8)^n

Let's call the initial depth of the snow (n = 0) as d0. d0 = 15 inches.

Every day, the snow depth decreases by 20%. So, the rate of change of the snow depth is -0.2.

Using this information, we can use the formula for exponential decay to find the depth of the snow (d) after n days:

d(n) = d0 * (1 - 0.2)^n

Substituting d0 = 15, we get:

d(n) = 15 * (0.8)^n

Therefore, the correct answer is as given above

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A:  The z-score is -0.9375; B:  a z-score of 1.25 corresponds to a score of 750; C: a score of 550 is one standard deviation below the mean.

a) To find the standardized z-score for a student scoring 595 on their GMAT, we use the formula:

z = (x - mu) / sigma

where x is the student's score, mu is the mean, and sigma is the standard deviation. In this case, mu = 630 and sigma = 80, so we have:

z = (595 - 630) / 80 = -0.9375

Therefore, the z-score is -0.9375.

b) To find the number of standard deviations a student scoring 670 is from the mean, we use the formula:

z = (x - mu) / sigma

where x is the student's score, mu is the mean, and sigma is the standard deviation. In this case, mu = 630 and sigma = 80, so we have:

z = (670 - 630) / 80 = 0.75

Therefore, the student scoring 670 is 0.75 standard deviations from the mean.

c) To find the score that corresponds to a z-score of 1.25, we use the formula:

x = mu + z * sigma

where x is the student's score, mu is the mean, and sigma is the standard deviation. In this case, mu = 630 and sigma = 80, so we have:

x = 630 + 1.25 * 80 = 750

Therefore, a z-score of 1.25 corresponds to a score of 750.

d) To find the score that is one standard deviation below the mean, we use the formula:

x = mu - sigma

where x is the student's score, mu is the mean, and sigma is the standard deviation. In this case, mu = 630 and sigma = 80, so we have:

x = 630 - 80 = 550

Therefore, a score of 550 is one standard deviation below the mean.

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The quantity supplied is determined by production costs, and the quantity demanded is determined by the desire for the product

The quantity demanded is a term that is used in economics to describe the total amount of a good or service that consumers demand over a given interval of time

When the production increase, fewer people could afford to put up the capital to do it, which reduce the quantity supplied to the market.

When the desire for a product increased, the amount of demand for a product will be the same since there is a larger amount of consumers who might be willing to obtain the product even at a higher price.

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The equation of the red line will be y = 5/3 x - 3 and The equation of the green line will be y = 0x + 1 i.e y = 1 .

What is Equation of a Straight line ?

Equation of a straight line as follows : y = mx + c

where m is the slope of line.

Start by seeing where the lines go. They cross (intersect) at (1, -1). We can use this to check later.

Now for slope: green is -4/2 = -2

pink is 4/2 = 2

Now we can create the equations

Let's make green = g(x) and pink = p(x)

if we use y = mx + b, then the green has a y-intercept (b) of +1

So g(x) = -2x + 1

pink has a y-intercept of -3, so p(x) = 2x - 3

Now let's plug n play: put our solutions x into each equation and confirm that it makes the y = -1

g(x) = -2x + 1 = -2(1) + 1 = -2+1 = -1

p(x) = 2x - 3 = 2(1) - 3 = 2-3 = -1

Therefore, The equation of the red line will be y = 5/3 x - 3 and The equation of the green line will be y = 0x + 1 i.e y = 1 .

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By the principle of mathematical induction, we can conclude that f1(x) = f2(x) ∀ x ∈ X. Hence, f1 = f2.

Let f1(x) and f2(x) be two functions such that f1(1)=f2(1). We can then say that f1(x)-f2(x) = 0 for x=1. Since f1(i)=f2(i) for all i, we can state that f1(x)-f2(x) = 0 for all x. Therefore, f1(x) = f2(x) for all x, and f1=f2.

Let f1 and f2 be two functions, f1:X→Y, f2:X→Y, where X and Y are two sets.

If we assume that f1(1) = f2(1) and f1(i) = f2(i) for all i ∈ X, then it follows that

f1(x)=f2(x) ∀ x ∈ X.

To prove this, we will use mathematical induction. We will assume that the statement is true for some k ∈ X and prove that it is true for k+1.

Let us assume that f1(k) = f2(k).

Then,

f1(k+1) = f2(k+1)

Since f1(k+1) = f1(k) and f2(k+1) = f2(k), we can say that

f1(k) = f2(k)

Therefore, by the principle of mathematical induction, we can conclude that f1(x) = f2(x) ∀ x ∈ X. Hence, f1 = f2.

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The statement that "there was only a 2.6% chance that the two groups were the same" is not accurate.

A p-value is a measure of the evidence against the null hypothesis, and represents the probability of observing a test statistic as extreme or more extreme than the one observed, assuming the null hypothesis is true.

A low p-value (typically less than 0.05) is often taken as evidence against the null hypothesis, and in favor of the alternative hypothesis.

However, a p-value does not directly measure the probability that the null hypothesis is true. It only provides information about the evidence against the null hypothesis, and not about the probability of the difference between the two groups.

The conclusion that "there was only a 2.6% chance that the two groups were the same" is not a valid interpretation of the p-value.

It is also worth noting that p-values are not the only evidence to consider when making a decision about the null hypothesis. Other factors, such as the effect size, the sample size, and the quality of the study design, should also be taken into account.

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Answer: Thus the mass of copper in solid form is m = 9860 kg / m^3.

Step-by-step explanation: solve it step by step

There are 2 dimes in the purse that contains $2.20

An equation is the equality between two algebraic expressions, which have at least one unknown or variable.

Let quarters be = x

The dimes be = 1/4 * x

25x+10x/4 = 220

(100x + 10x) /4 = 220

110x/4 = 220

110x = 220*4

110x = 880

x = 880/110

x = 8

The dimes be = 1/4 * x

The dimes be = 1/4 * 8

The dimes be = 2

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Answer:

$45

Step-by-step explanation:

We know

A merchant bought an item for $30 and sold it for 50% more.

50% of $30 = $15

What price did the merchants sell the item?

$30 + $15 = $45

So, the merchants sell the item for $45

Answer:

The critical value for a 95% confidence level is 1.711.

Step-by-step explanation:

a=0.05

1-a=0.95

Degrees of freedom df =21-1=20

using the t-distribution table, the critical value for a 95% confidence level and df=20 is 1.711

Answer:

it should be 24

Step-by-step explanation:

[tex]\textit{Logarithm Change of Base Rule} \\\\ \log_a b\implies \cfrac{\log_c b}{\log_c a}\qquad \qquad c= \begin{array}{llll} \textit{common base for }\\ \textit{numerator and}\\ denominator \end{array} \\\\[-0.35em] ~\dotfill\\\\ \log_5(11)\implies \cfrac{\log_{10}(11)}{\log_{10}(5)}\implies \stackrel{\textit{\Large both are equal}}{\boxed{\cfrac{\log(11)}{\log(5)}}\implies \cfrac{\log_{e}(11)}{\log_{e}(5)}\implies \boxed{\cfrac{\ln(11)}{\ln(5)}}}[/tex]

An example of a relation that is a function is {(2,1),(5,1),(8,1),(11,1),(14,1),(17,1)}.

Functions are the fundamental part of the calculus in mathematics. The functions are the special types of relations. A function in math is visualized as a rule, which gives a unique output for every input x.

Relations and functions define a mapping between two sets (Inputs and Outputs) such that they have ordered pairs of the form (Input, Output).

An example of a relation that is a function:

{(2,1),(5,1),(8,1),(11,1),(14,1),(17,1)}

It is a function as every input has a single output.

So, 2,5,8,11,14 and 17 are the elements of the domain of the given relation.

Here domain ={2,5,8,11,14,17} and range ={1}

An example of a relation that is not a function

{(1,3),(1,5),(2,5)}

Since the element  1 corresponds to two different images i.e., 3 and 5 . So, this relation is not a function.

Therefore, an example of a relation that is a function is {(2,1),(5,1),(8,1),(11,1),(14,1),(17,1)}.

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Answer: 10 units

Step-by-step explanation:

    We can use the following formula to determine the diameter of this cone. V is equal to volume, r is equal to radius (half of the diameter), and h is equal to height.

          [tex]\displaystyle \boxed{r=\sqrt{3\frac{V}{\pi h}} }[/tex]

Given:

[tex]\displaystyle r=\sqrt{3\frac{V}{\pi h}}[/tex]

Substitute known values:

[tex]\displaystyle r=\sqrt{3\frac{100\pi}{\pi (12)}}[/tex]

Divide:

➜ [tex]\frac{\pi}{\pi}=1[/tex], so we are left with 100 divided by 12

[tex]\displaystyle r=\sqrt{3(\frac{25}{3} )}}[/tex]

Multiply:

➜ When multiplying, we can think of it as [tex]\frac{3}{1} *\frac{25}{3}[/tex].   [tex]\frac{3}{3} =1[/tex], so we are left with 25.

[tex]\displaystyle r=\sqrt{25}[/tex]

Square root:

r = 5, r = -5

   Since it's a measure of a shape, it cannot be negative. This means the radius is equal to 5. Now, we will find the diameter.

5 units * 2 = 10 units

The election board’s voter registration list is not a census because the eligibility to vote may affect some persons not to be counted also the body organizing the activities are not same

A census,, is a comprehensive count of the population that is conducted by the government. It is used to gather information about the size, distribution, and characteristics of the population for a variety of purposes, including apportioning congressional seats, drawing electoral districts, and allocating federal funds to states and localities.

Because voter registration and census are two different processes with different goals, they may not capture the same individuals. For example, not all adults are eligible to vote, such as non-citizens, felons, and those under the age of 18. Additionally, some eligible voters may choose not to register, while others may be missed by registration efforts. Therefore, the voter registration list may not be a complete or accurate representation of the adult population.

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Yes, the quadratic function f(x) and the linear function g(x) will intersect. The x-coordinate of the point of intersection could be positive, negative or zero, depending on the specific functions.

From the data given, it's not possible to determine the x-coordinate of the point of intersection.

A quadratic polynomial in mathematics is a polynomial of degree two in one or more variables. The polynomial function defined by a quadratic polynomial is known as a quadratic function.

Linear functions are usually written as y = mx + b and graphed as straight lines.

Begin with the y-intercept or b value, then use the slope to identify a second point on the graph. Quadratic functions are graphed as curved parabolas and have the formula y = ax2 + bx + c.

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The scalar projection of b onto a is -7.33.

The scalar projection of a vector b onto a vector a is the magnitude of the component of b that is parallel to a. It is calculated by taking the dot product of the two vectors, and dividing it by the magnitude of a. Mathematically, this is represented by the equation:

(a⋅b)/|a|

In this example, the dot product of vectors a and b is equal to -66, and the magnitude of vector a is equal to 9. Therefore, the scalar projection of b onto a is equal to -7.33.

To calculate the scalar projection, we first need to calculate the dot product of a and b. To do this, we take the components of each vector and multiply them together. For vector a, this is done by taking -2 multiplied by -3, 8 multiplied by -10, and 3 multiplied by 5. We then add all of these products together to get the dot product of a and b, which is equal to -66.

Next, we calculate the magnitude of vector a, which is done by taking the square root of the sum of the squares of its components. For vector a, this is equal to the square root of (-2)^2 + (8)^2 + (3)^2, which is equal to 9.

Finally, we divide the dot product of a and b by the magnitude of a, which is -66 divided by 9, which is equal to -7.33. Therefore, the scalar projection of b onto a is -7.33.

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The solution to the given integral is 5ye10 - 5ye5 + c(y10 - y5).

To evaluate the given integral, we must first reverse the order of integration. This is done by switching the limits of integration for the two variables. In this case, the limits for the y variable are 10 and 5, and the limits for the x variable are 5 and 5. Thus, the integral can be rewritten as:

∫5∫10yex2dxdy

To evaluate this integral, we can use the following formula:

∫a∫bf(x,y)dxdy = ∫a∫bf(y,x)dydx

Using this formula, we can rewrite the integral as:

∫5∫10yex2dydx

We can now use the product rule to separate the integral into two separate integrals. First, we can integrate with respect to x:

∫5yex2dx

This integral can be solved using the fundamental theorem of calculus:

∫5yex2dx = 5ye5 - 5ye5 + c

Next, we can integrate with respect to y:

∫10(5ye5 - 5ye5 + c)dy

This integral can be solved by simply integrating the constants and the exponential:

∫10(5ye5 - 5ye5 + c)dy = 5ye10 - 5ye5 + c(y10 - y5)

Combining the two solutions, we get the following:

∫5∫10yex2dxdy = 5ye10 - 5ye5 + c(y10 - y5)

Therefore, the solution to the given integral is 5ye10 - 5ye5 + c(y10 - y5).

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Answer:y = -2x + 5

Step-by-step explanation: Slope intercept form is given by the equation y = mx+b where m is the slope and b is the y intercept

1. The slope or m would be -2 because the slope of the live given is -2. We can tell since we can do rise/run or Δy/Δx.  We can take two points on the line and use Δy/Δx

Lets use:

(0,4) and (2,0)

Then plug it in so:

[tex]\frac{y2-y1}{x2-x1}[/tex]

[tex]\frac{4-0}{0-2}[/tex]

m = -2

Now we just need b which is fortunatly given to us since b is when x is equal to 0 and it saids in the question "passes through the point (0,5)" so since its (x,y) and x is 0, b is 5.

Finally, after substitution, we get:

y = -2x + 5

The 9-hour training schedule is broken up into his Wednesday clients' 6 hours and his Thursday clients' 7 hours.

Its core idea is thought to represent number's greatest equivalent fraction. How to determine the simplest form. Look for shared factors in the denominator and treble. A fractional number can be checked to discover if it is a prime number. A statement having two spherical geometry and an equal sign in the middle is referred to as a mathematical equation. The formula for a linear equation is x + b = 0. The general form of a two-variable linear equation is an x + b y + c = 0. (or something similar). Neither conditional equation or identities are categories for equations.

given

Make a system of equations where A represents the length of a Plan A session and B represents a Plan B session.

This Wednesday: 2A + 12B = 9 hours.

Thursday: 5A + 3B = 9 hours

Using addition, multiply the Thursday equation by -4 to find the solution:

2A + 12B = 9

(5A + 3B = 9) * -4

2A + 12B = 9

-20A -12B

= -36

The B's disappear if you combine the two equations:

1.5 hours from -18A to -27A.

the following into one of the initial equations:

12B = 6 B = 0.5 hours + 2(1.5) = 9

The 9-hour training schedule is broken up into his Wednesday clients' 6 hours and his Thursday clients' 7 hours.

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According to the quadratic equation the solution of k is 48 ± 8√26.

In math the term called quadratic equation is known as the polynomial equation whose highest degree is two

As we all know that the value of the quadratic equation is written as,

=> (k - 4)x² - 3kx - 4(k -2) = 0.

Now we have identified that the given equation is in the form of ax² + bx + c = 0.

Here we have also identified the value of a = k - 4, b = -3k and c = 4(k-2)

And then we have to use the quadratic formula to identify the value of k,

Here it can be written as.

=> (-3k)² - (4 x (k - 4) x 4(k-2))

When we expand the term then we get,

=> 9k² - (16k² - 32k - 64k + 128)

When we simplify this one then  we get

=> -5k² + 96k - 128 = 0

Here we have to factorize the expression then we get the value of k as 48 ± 8√26.

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The annual sales after the 7th year is 855,355.65

An exponential function is a type of function in math that involves exponents. A basic exponential function is of the form f(x) = bx, where b > 0 and b ≠ 1.

The standard expression for an exponential function is expressed as: y=a(1+r)^t

From the parameters in the question

Given the following parameters

a = 650000

r = 4% = 0.04

t = 7

Substitute the given parameters into the formula:

y=a(1+r)^t

y = 650000(1+0.04)^7

y= 650000(1.04)^7

y=855,355.65

Hence, the annual sales for the local restaurant after 7 years is 855,355.65

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Based on the information, it can be inferred that Kayla would spend $51 buying a pair of jeans and a skirt.

To find the final value that Kayla paid we must carry out the following procedure:

We must find the equivalent of 25% of the total value of your purchase. Then we must add the value of both products and find the discount.

Based on the above, Kayla would pay $51 for both products and the discount would be $17.

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Bob needs to run at a speed of at least 10.39 feet per second to catch the elevator.

To catch the elevator, Bob needs to reach the door before it fully closes, which means he needs to cover the distance of 4.3 - 0.6 = 3.7 feet in the time it takes the door to close. We can use the formula:

distance = rate x time

to find the time it takes for the door to close, and then use this time to find the speed that Bob needs to run. Let's set up the equation:

3.7 = 1.2t

where t is the time it takes for the door to close.

Solving for t, we get:

t = 3.7/1.2 = 3.08 seconds

Now we can use the formula again to find the speed that Bob needs to run:

speed = distance / time

speed = 32/3.08

speed = 10.39 feet per second (rounded to the nearest hundredth)

Therefore, Bob needs to run at a speed of at least 10.39 feet per second to catch the elevator.

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