Use a calculator to find the approximate value of arccos(0.67).

Answer:

No real solutions.

Step-by-step explanation:

[tex]y=x^2-3x-4[/tex]

[tex]x=y+8[/tex]

I'm going to subtract the second expression for y and plug it into the first equation.

So solving x=y+8 for y by subtracting 8 on both sides gives us y=x-8.

I'm going to insert this for the first y like so:

[tex]x-8=x^2-3x-4[/tex]

Now I'm going to move everything to one side.

I'm going to subtract x on both sides and add 8 on both sides.

[tex]0=x^2-3x-x-4+8[/tex]

Simplifying:

[tex]0=x^2-3x+4[/tex]

Now our job since the coefficient of x^2 is 1 is to find two numbers that multiply to be 4 and at the same time add up to be -3. I can't think of any such numbers.

Let's check the discriminant.

Compare [tex]x^2-3x+4[/tex] to [tex]ax^2+bx+c[/tex].

So [tex]a=1,b=-3,c=4[/tex].

The discriminant is [tex]b^2-4ac[/tex].

So plugging in our numbers we get [tex](-3)^2-4(1)(4)[/tex].

Time to simplify:

[tex](-3)^2-4(1)(4)[/tex]

[tex]9-16[/tex]

[tex]-7[/tex]

So since the discriminant is negative, then the solutions will not be real.

Answer:

I believe the answer rqould be B since only 1 thing happened

Answer: Option B

Step-by-step explanation:

Simple event is an event where all the possible outcomes have the same probability.

Are the type of events that we can write as:

P = number of a given outcome/total posible outcomes.

Here we have 3 combined options (A, C and D) that, while in parts can be described in that way, not as whole events.

The correct option is B, where the probability of getting a given number in a dice is the number of times that the number repeats (1) divided the total number of options (6), P =  1/6 for all the numbers, so this is a simple event.

Answer:

Wrong

Step-by-step explanation:

The student is wrong. Two angles are coterminal if and only if the difference between their measures is a multiple of 360°.

The difference between the angles 180° and –180° is 360°, and they are coterminal. Therefore the student is WRONG.

Answer:

The student is wrong. Two angles are coterminal if and only if the difference between their measures is a multiple of 360°.

The difference between the angles 180° and –180° is 360°, and they are coterminal. Therefore the student is WRONG.

Step-by-step explanation:

Answer:

[tex]x_{1}=\frac{+3+\sqrt{5} }{2}\\\\x_{2}=\frac{+3-\sqrt{5} }{2}[/tex]

Step-by-step explanation:

Using:

[tex]x=\frac{-b+-\sqrt{b^{2}-4*a*c} }{2*a}[/tex]

we will have two solutions.

x^2-3x+1=0

So, a=1   b=-3  c=1

[tex]x_{1}=\frac{+3+\sqrt{-3^{2}-4*1*1} }{2*1}\\\\x_{2}=\frac{+3-\sqrt{-3^{2}-4*1*1} }{2*1}[/tex]

We have two solutions:

[tex]x_{1}=\frac{+3+\sqrt{5} }{2}\\\\x_{2}=\frac{+3-\sqrt{5} }{2}[/tex]

The answer is in the picture below! :)

|

V

Answer:

The answer is equal to. Each equation equals 1.

Answer:

f(x) = 4(1.02)^(7x); spreads at a rate of approximately 2% daily

Step-by-step explanation:

The weekly number of people infected is:

f(x) = 4(1.15)^x

So the daily number of people infected is:

f(x) = 4(1+r)^(7x)

To find the value of the daily rate r, we set this equal to the first equation.

4(1.15)^x = 4(1+r)^(7x)

(1.15)^x = (1+r)^(7x)

(1.15)^x = ((1+r)^7)^x

1.15 = (1+r)^7

1.02 = 1+r

r = 0.02

So the equation is f(x) = 4(1.02)^(7x), and the daily rate is approximately 2%.

Using exponential functions, it is found the daily function for the spread is:

[tex]f(x) = 4\left(\frac{1.15}{7}\rigth)^{x}[/tex], and it spreads at a rate of approximately 2% daily.

An exponential function has the following format:

[tex]y = ab^x[/tex]

In which:

In this problem, the function for the weekly spread is:

[tex]f(x) = 4(1.15)^x[/tex]

A week has 7 days, thus, to find the daily spread, we divide the rate of change by 7, that is:

[tex]f(x) = 4\left(\frac{1.15}{7}\right)^x[/tex]

[tex]\frac{15}{7} \approx 2.1[/tex], thus, it spreads at a rate of approximately 2% daily.

A similar problem is given at https://brainly.com/question/23416643

The perimeter of a rectangle with sides of 14 ft and 8 ft is 44 ft.

The perimeter of a rectangle is calculated by adding all its sides. For a rectangle with sides of 14 ft and 8 ft, the perimeter is found by adding twice the length and twice the width:

Perimeter = 2(length + width)
Perimeter = 2(14 + 8) = 2(22) = 44 ft

Answer:

The slope is 2.

Step-by-step explanation:

The given line has equation: [tex]f(t)=2t-6[/tex].

This is a linear equation in [tex]t[/tex].

The slope is the coefficient of the independent variable [tex]t[/tex].

The coefficient of [tex]t[/tex] in  [tex]f(t)=2t-6[/tex] is 2.

Therefore the slope is 2.

Alternatively,  [tex]f(t)=2t-6[/tex] is of the form  [tex]f(t)=mt+c[/tex], where [tex]m=2[/tex] is the slope.

Answer:

Step-by-step explanation:

The slope is 2 and the y intercept is -6

Answer:

=2.83 the second option

Step-by-step explanation:

Using the trigonometric ratios we can find the sides of the triangle with the acute angles.

In the triangle provided we will use COSINE

Cos ∅=adjacent/hypotenuse

Let us substitute with the values in the question into the formula.

Tan 45 =2/x

x=2/Cos 45

=2.83 units

Answer: SECOND OPTION.

Step-by-step explanation:

You can use the following identity:

[tex]cos\alpha=\frac{adjacent}{hypotenuse}[/tex]

In this case:

[tex]\alpha=45\°\\adjacent=2\\hypotenuse=x[/tex]

Therefore, in order to calculate the value of "x", you need to substitute values into [tex]cos\alpha=\frac{adjacent}{hypotenuse}[/tex] and solve for "x".

This is:

[tex]cos(45\°)=\frac{2}{x}\\\\xcos(45\°)=2\\\\x=\frac{2}{cos(45\°)}\\\\x=2\sqrt{2}[/tex]

[tex]x[/tex]≈[tex]2.83[/tex]

The two lines are parallel, which means they never touch, cross or meet.

Answer: No solution

Answer:

no solution

Step-by-step explanation:

ANSWER

[tex]x = - \frac{2}{9} [/tex]

EXPLANATION

The given equation is :

[tex] \frac{2}{5}(x - 2) = 4x[/tex]

We multiply both sides by [tex] \frac{5}{2} [/tex]

[tex] \frac{5}{2} \cdot\frac{2}{5}(x - 2) = 4x \times \frac{5}{2} [/tex]

We simplify to obtain:

[tex]x - 2 = 10x[/tex]

Group similar terms to obtain:

[tex] - 2 = 10x - x[/tex]

Simplify the right hand side.

[tex] - 2 = 9x[/tex]

Divide both sides by 9.

[tex] \frac{ - 2}{9} = \frac{9x}{9} [/tex]

[tex] - \frac{2}{9} = x[/tex]

Or

[tex]x = - \frac{2}{9} [/tex]

The second choice is correct

The solution for [tex]x[/tex] is [tex]x = -\frac{2}{9}[/tex].

To solve the equation [tex]\frac{2}{5} (x - 2) = 4x[/tex], we need to perform the following steps:

Distribute the Fraction:
We start by distributing [tex]\frac{2}{5}[/tex] to both terms inside the parentheses:
[tex]\frac{2}{5}x - \frac{2}{5} \cdot 2 = 4x[/tex]
This simplifies to:
[tex]\frac{2}{5}x - \frac{4}{5} = 4x[/tex]

Isolate the Variable:
Next, we want to get all terms involving [tex]x[/tex] on one side. We can do this by subtracting [tex]\frac{2}{5}x[/tex] from both sides:
[tex]-\frac{4}{5} = 4x - \frac{2}{5}x[/tex]

Now, we can combine the [tex]x[/tex] terms on the right:
[tex]4x - \frac{2}{5}x = \left(4 - \frac{2}{5}\right)x = \left(\frac{20}{5} - \frac{2}{5}\right)x = \frac{18}{5}x[/tex]
Thus, we have:
[tex]-\frac{4}{5} = \frac{18}{5}x[/tex]

Solve for x:
Now, we want to solve for [tex]x[/tex] by multiplying both sides of the equation by the reciprocal of [tex]\frac{18}{5}[/tex], which is [tex]\frac{5}{18}[/tex]:
[tex]x = -\frac{4}{5} \cdot \frac{5}{18} = -\frac{4}{18} = -\frac{2}{9}[/tex]

Given the multiple-choice options of [tex]\frac{2}{9}[/tex], [tex]9[/tex], [tex]-\frac{2}{9}[/tex], and [tex]-\frac{9}{2}[/tex], the correct answer is negative 2 over 9.

Answer:

Step-by-step explanation:

The slope-intercept form of an equation of a line:

[tex]y=mx+b[/tex]

m - slope

b - y-intercept

We have the equation in the standard form:

[tex]6x+3y=12[/tex]

Convert to the slope intercept form:

[tex]6x+3y=12[/tex]              subtract 6x from both sides

[tex]3y=-6x+12[/tex]           divide both sides by 3

[tex]y=-2x+4[/tex]

slope: m = -2

y-intercept: b = 4

Answer:

<-6,-4>

Step-by-step explanation:

To find u+v, all you have to do is add the corresponding components of each.

That is for example on this problem, you would do

<-3,-5>+<-3,1>

=<-3+-3,-5+1>

=<-6,-4>.

Answer:

A closed circle on the graph indicates that the point is included in domain and range. An open circle indicates that the point is not included in the domain and range.

Now based on this, we will evaluate the given options:

Option A. The function g(x) is defined for all real numbers x.

The lines on the graph contain a limited values. Hence its obvious that the domain and range is not the set of all Real numbers. Hence this option is Wrong.

Option B. The maximum value of the range is 4.

From the graph we can see that the maximum/highest value along y-axis is 4. Since there is a closed circle at (-4, 4), this value is included in the range. Hence this option is True.

Option C. The maximum value of the domain is 3

There is an open circle at the point when x is 3. Hence this point is not included in the Domain. Value of domain is numbers less than 3. Hence this option is Wrong.

Next two options are incomplete. Here are the complete options and listed correctly.

Option D. The range of g(x) is {yl -1 < y ≤ 4}

This is correct because there is an open circle at point (3, -1). Hence -1 would not be included in the range. The range will be set of all values from -1 to 4, including 4 as there is a closed circle at (-4, 4)

Option E. The domain of g(x) is {x| x ≤ -4 ≤ -1 or 0 ≤ x <3}

Since there are closed circles at points where x is -4, -1 and 0, these points would be included in the Domain. 3 wont be included in the Domain as there is an open circle.

Answer:

B and D are correct.

Answer:

8 1/8 hours

Step-by-step explanation:

1 5/8 * 5 = 5 25/8

5 28/5 = 5 + 3 + 1/8

= 8 1/8 hours

I think the answer is 8 1/8

Answer:

x = -4

Step-by-step explanation:

Notice that the two points given, share the same x-value even when the y-value changes. This is because the equation is going to be a vertical line at -4 on the x-axis. Being a vertical line, you cannot take its slope using the slope formula of: m = (y2 - y1) / (x2 - x1) because the denominator will result in a 0 and you cannot divide by 0 in mathematics.

Answer:

51 and 255

Step-by-step explanation:

Let the number of programs sold by Jay be x.

Then programs sold by Hanna is 5x.

Also, the difference between them is 204.

5x - x =204

4x = 204

x = 204/4

x = 51

Therefore, Jay sold 51 programs and Hanna sold 5 x 51 = 255 programs.

Please mark Brainliest if this helps!

Jay sold 51 programs and Hanna sold 255 programs.

To determine how many programs Jay and Hanna sold, let's start by defining some variables.

Let [tex]J[/tex] be the number of programs Jay sold.

Since Hanna sells 5 times more programs than Jay, we can express her sales as [tex]5J[/tex].

We know the difference in their sales is 204 programs.

Therefore, we can write the equation:

[tex]5J - J = 204[/tex]

Simplify the equation:

[tex]4J = 204[/tex]

Next, solve for [tex]J[/tex] by dividing both sides by 4:

[tex]J = \frac{204}{4}[/tex]

[tex]J = 51[/tex]

So, Jay sold 51 programs.

Since Hanna sells 5 times more programs than Jay, we can calculate Hanna's sales as:

[tex]5 \times 51 = 255[/tex]

Answer:

no solution

Step-by-step explanation:

If you divide the first equation by 2 you get:

2x+2y=4  (first equation after dividing both sides by 2)

2x+2y=-4  (second equation)

This is setup for elimination.

Subtract the equations:

2x+2y=4

2x+2y=-4

--------------Subtracting!

0+0=8

    0=8

0=8 is a false equation which implies the system has no solution.

Answer:

a) No Solutions

Step-by-step explanation:

It might be helpful to first get the equations in terms of y = mx + b.

The first equation (4x + 4y = -8) can be rewritten like this:

4x + 4y = -8 (original equation)

4y = 4x - 8 (subtract 4x from both sides)

y = x - 4 (divide everything by 4 to get y on its own)

and now you have an equation in terms of y = mx = b, where m is 1 and b is -4.

The second equation can be written like this:

2x + 2y = -4 (original equation)

2y = 2x - 4 (subtract 2x from both sides)

y = x - 2 (divide everything by 2 to get y on its own)

and once again we have an equation with m being 1 and b being -2.

So hopefully you should see that the equations will never touch because they have the same slope. Because the equations never touch, they have no solutions. Have a look at the graph.

Answer:

A = 64 pi inches ^2

Step-by-step explanation:

Circumference is equal to

C =2*pi*r  where r is the radius

16 pi = 2 * pi *r

Divide each side by 2 pi

16pi/2pi = 2pir/2pi

8 = r

The radius is 8

To find the area, we use

A = pi r^2

   =pi (8)^2

  = 64 pi

Answer:

(x^2)/3 + 4

Step-by-step explanation:

4 more means add four and the quotient of x squared and 3 shows that x squared must be divided by three before added to 4

please mark brainliest :)

Step-by-step answer:

Referring to the attached diagram, the resultant of two forces each with magnitude F and inclined to each other at 2a equals

Ra = 2Fcos(a) ..............................(1)

Similarly, the resultant of two forces each with magnitude F and inclined to each other at 2b equals

Rb = 2Fcos(b)..............................(2)

We are given that

Ra = 2Rb  ....................................(3)

Substitute (1) & (2) in (3) gives

2Fcos(a) = 2(2Fcos(b))

Expand

2Fcos(a) = 4Fcos(b)

Simplify

cos(a) = 2 cos(b)   QED

Note: Please note that you might have a faster response if you posted this question in the physics or the (new) Engineering section.

Have a nice day!

[tex]A\cap B=\{x:x\in A \wedge x\in B\}[/tex]

[tex]A\cap B=\{2,4\}[/tex]

For this case we have the following sets:

A = {1,2,3,4,5}

B = {2,4}

We must find the intersection of both sets, the symbol ∩ denotes intersection. That is, the numbers in common of both.

We have to:

A∩B = {2,4}

Answer:

The insterseccion of both sets is:

A∩B = {2,4}

Answer:

5

Step-by-step explanation:

The inverse of [tex]f(x)=2^x[/tex] is [tex]g(x)=\log_2(x)[/tex].

[tex]g(32)=\log_2(32)[/tex]

[tex]\log_2(32)=5[/tex] since [tex]2^5=32[/tex].

[tex]g(32)=\log_2(32)=5[/tex]

Note: In general, the inverse of [tex]f(x)=a^x[/tex] is [tex]g(x)=\log_a(x)[/tex].

The question appears to be about finding the midpoint of segment AH, which involves dividing the segment into two equal parts, either by measurement or by averaging the coordinates of A and H if available.

The question seems to be asking about identifying the midpoint of a line segment in a geometric construction. However, the provided text alludes to various geometric proofs and theorems, rather than directly providing information about finding midpoints.

To find the midpoint of segment AH, one would need to measure the length of AH and then divide it by 2 to find the center point. If the points A and H are on a coordinate plane, the midpoint can be found by calculating the average of the x-coordinates and the y-coordinates of the endpoints A and H. Without specific coordinates or measurements, a more detailed answer cannot be provided.

The midpoint of AH is (0, 4).

Let's assign coordinates to the points A and H to make it easier to calculate the midpoint. Suppose A is at (x1, y1) and H is at (x2, y2).

The formula for finding the midpoint M of a line segment with endpoints (x1, y1) and (x2, y2) is:

[tex]M = \left( \frac{x1 + x2}{2}, \frac{y1 + y2}{2} \right)[/tex]

If we assume A is at (0, 0) and H is at (0, 8) (since H is directly 'below' A on a vertical line), the coordinates are as follows:
A = (0, 0)
H = (0, 8)

Now, applying the midpoint formula:

[tex]M = \left( \frac{0 + 0}{2}, \frac{0 + 8}{2} \right) = (0, 4)[/tex]

Answer:

[tex]3-\sqrt{11}[/tex]

Step-by-step explanation:

If you want rational coefficients then you would want the conjugate of any irrational zero given.

The question is equivalent to what is the conjugate of [tex]3+\sqrt{11}[/tex].

The conjugate of [tex]3+\sqrt{11}[/tex] is [tex]3-\sqrt{11}[/tex].

In general, the conjugate of a+b is a-b

or the conjugate of a-b is a+b.

Or maybe you like this explanation more:

Let [tex]x=3+\sqrt{11}[/tex]

Subtract 3 on both sides:

[tex]x-3=\sqrt{11}[/tex]

Square both sides:

[tex](x-3)^2=11[/tex]

Subtract 11 on both sides:

[tex](x-3)^2-11=0[/tex]

Use difference of squares to factor. I apply [tex]u^2-v^2=(u-v)(u+v)[/tex].

[tex]([x-3]-\sqrt{11})([x-3]+\sqrt{11})=0[/tex]

So you have either

[tex][x-3]-\sqrt{11}=0[/tex] or [tex][x-3}+\sqrt{11}=0[/tex]

Solve both for x-3 and then x.

Add sqrt(11) on both sides for first equation and subtract sqrt(11) on both sides for second equation:

[tex]x-3=\sqrt{11}[/tex] or [tex]x-3=-\sqrt{11}[/tex]

Add 3 on both sides:

[tex]x=3+\sqrt{11}[/tex]  or [tex]x=3-\sqrt{11}[/tex]

Answer:

the answer is C.

Step-by-step explanation:

Answer:

B. & E.

Step-by-step explanation:

First, to find your slope, put your line into slope-intercept form.

[tex]y=mx+b\\[/tex]

[tex]3x-4y=7\\-4y=-3x+7\\y=\frac{3}{4} x-\frac{7}{4}[/tex]

Your slope is [tex]\frac{3}{4}[/tex].

Now, you can find the y-intercept of your parallel line by plugging your given point and your slope into point-slope form.

[tex]y-y1=m(x-x1)\\y-(-2)=\frac{3}{4} (x-(-4))\\y+2=\frac{3}{4} (x+4)\\y+2=\frac{3}{4} x+3\\y=\frac{3}{4} x+1[/tex]

Your y-intercept is 1.

If you notice, answer choice E is equivalent to one of our steps in converting it to point-slope form. Therefore, E is one of your answers.

The equation of your parallel line is:

[tex]y=\frac{3}{4} x+1[/tex]

B is also a correct answer.

If you put B into slope-intercept form, you get the following:

[tex]3x-4y=-4\\-4y=-3x-4\\y=\frac{3}{4} x+1[/tex]

This, of course, is equivalent to the parallel line which we already found, so we know it is parallel.

Answer:

2πrh unit^2.

Step-by-step explanation:

The lateral area is  the circumference of the base * the height =  2πrh.

The lateral area of a right cylinder with height equal to h and r as the radius is 2πrh. Therefore, option C is the correct answer.

All of the sides of the object are the lateral surface of an object, except its base and top (when they exist). The lateral surface area is the lateral surface zone. This is to be distinguished from the overall surface area, which, along with the base and top areas, is the lateral surface area.

The surface area that a cylinder's curved surface alone covers is known as the curved surface area (CSA) or lateral surface area. The curved surface area of a cylinder is computed using the formula 2πrh, where  height of the cylinder is h and the radius of the base is r.

Therefore, option C is the correct answer.

Learn more about the lateral surface area here:

https://brainly.com/question/14001755.

#SPJ7

"Your question is incomplete, probably the complete question/missing part is:"

Which of the following formulas would find the lateral area of a right cylinder with height equal to h and r as the radius?

A. LA = 2πr²

B. LA = 2πr

C. LA = 2πrh

D. LA = 2πr² + 2πrh

Answer:first equation is 4 units shifted down from the second

Step-by-step explanation:

Answer:

The graph of y = 5x²-4 differs from the graph of y = 5x² by difference of 4 units

Step-by-step explanation:

In y = 5x²-4, when y is 0 x is not 0 and when x is 0 , y is not 0

but

In y = 5x² , when y is 0 , x is 0 and vise versa.

In y = 5x² the value of y will always increase as the value of x increase.

Answer:

D.

Step-by-step explanation:

The data is symmetric for Shop A but not for Shop B ( note the values 10 and 11 for Shop B which are a lot lower than the other values).

Mean for Shop A and Median for Shop B.

Answer:

The correct option is B.

Step-by-step explanation:

The number of lattes sold daily by two coffee shops is shown in the table.

The data set for shop A is

55, 52, 56, 48, 57, 30, 45, 41

Arrange the data in ascending order.

30, 41, 45, 48, 52, 55, 56, 57

Mean of shop A is

[tex]Mean=\frac{\sum x}{n}=\frac{30+41+45+48+52+55+56+57}{8}=48[/tex]

[tex]Median=\frac{(\frac{n}{2})th+(\frac{n}{2}+1)th}{2}=\frac{48+52}{2}=50[/tex]

The data set for shop B is

45, 42, 57, 48, 11, 10, 46, 43

Arrange the data in ascending order.

10, 11, 42, 43, 45, 46, 48, 57

Mean of shop A is

[tex]Mean=\frac{\sum x}{n}=\frac{10+11+42+43+45+46+48+57}{8}=37.75[/tex]

[tex]Median=\frac{(\frac{n}{2})th+(\frac{n}{2}+1)th}{2}=\frac{43+45}{2}=44[/tex]

Both data distribution are not symmetric, so it is better to describe the centers of distribution in terms of median for both coffee shops. Therefore the correct option is B.

[tex]21[/tex]