Answer:
1.25 gallons of alcohol
Step-by-step explanation:
Let x represent the amount of alcohol to add to the mix. Then the total amount of alcohol in the mix is ...
0.15×20 + x = 0.20×(20 +x)
3 +x = 4 + 0.2x . . . . simplify
0.8x = 1 . . . . . . . . . . add -3-0.2x
x = 1/0.8 = 1.25 . . . . divide by 0.8
1.25 gallons of alcohol should be added to make 21.25 gallons of 20% alcohol.
Why does the PCI require banks to protect customers’ card data?
A.
to protect banks from hackers and malware
B.
to help improve the cyber community
C.
to establish good practices in the banking community
D.
to protect consumers from online fraud and theft
Answer:
D. to protect consumers from online fraud and theft
Step-by-step explanation:
The point of protection of personal identifying and financial data is to prevent fraud and theft.
___
The reason why hackers and malware attack banks is to get to data that would enable fraud and theft. "Good practices" prevent such data compromise, so protecting customers from fraud and theft.
Answer:
Why does the PCI require banks to protect customers’ card data?
A.
to protect banks from hackers and malware
B.
to help improve the cyber community
C.
to establish good practices in the banking community
D.
to protect consumers from online fraud and theft
Step-by-step explanation:
#platofam
45 POINTS! HELP ASAP AND ILL MARK AS BRAINLIEST!
What are the amplitude, period, and midline of the function? (1 point)
Amplitude: 8; period: π; midline: y = 1
Amplitude: 8; period: 2π; midline: y = 5
Amplitude: 4; period: 2π; midline: y = 5
Amplitude: 2; period: π; midline: y = 1
Amplitude = 2; period T = π; midline y = 1.
This sinusoidal wave is a even function which means that it has a positive half-cycle and a negative half-circle of equal size, from the image we can see that the midline is y = 1 which is the point where the function is centered.
The amplitude is the measure from the midline to the positive half-cycle, and the midline to the negative half-cycle which is 2.
The period corresponds to a complete cycle of the function or the repetition of the wave seen from a point. In this case, we can see that the wave, starting from π/2 it repeat in 3π/2. So, to calculate the period just substract 3π/2 by π/2
T = 3π/2 - π/2 = (3π - π)/2
T = 2π/2
T = π
There is a flu outbreak at your school that starts with 10 people. The number of ill students increases by 20% each hour. Write an exponential function to represent the total number of ill students, f(x), where x is the number of hours after the outbreak. How long does it take for at least 100 people to be ill with the flu?
a. About 10 hours
b. About 13 hours
c. About 20 hours
d. Not enough information
Answer:
d
Step-by-step explanation:
what does ' f ' represent?
The exponential function for the total number of ill students is [tex]f(x) = 10 * (1.20)^x,[/tex] where x is the number of hours after the outbreak. To reach at least 100 ill students, it takes about 13 hours. So correct answer is option B.
To represent the total number of ill students f(x) as an exponential function where x is the number of hours after the outbreak, we use the initial value of 10 people sick and an hourly increase rate of 20%. The function is: [tex]f(x) = 10 * (1 + 0.20)^x[/tex].
To find how long it takes for at least 100 people to be ill, we set f(x) \\>= 100 and solve for x:
[tex]10 * (1.20)^x \ > = 100\\(1.20)^x \ > = 10x\\\\log(1.20) \ > = \log(10)\\x > = \log(10) \\ \\log(1.20)\\x = 12.2[/tex]
Therefore, it takes about 13 hours for at least 100 people to be ill. So the answer is b. About 13 hours.
The graph of F(X), shown below, has the same shape as the graph of
G(x) = x2, but it is shifted up 1 unit. What is its equation?
Answer:
Option B. [tex]F(x)=x^{2}+1[/tex]
Step-by-step explanation:
we know that
[tex]G(x)=x^{2}[/tex]
This is the equation of a vertical parabola open upward wit vertex at (0,0)
The rule of the translation of G(x) to F(x) is equal to
(x,y) ----> (x,y+1)
therefore
The vertex of the function f(x) is the point (0,1) and the equation is equal to
[tex]F(x)=x^{2}+1[/tex]
Graph the following system of linear inequalities. Identify at least two points in the solution: y < 5 - 2x | x + 5y > -7
Answer:
(1,2) and (2,-1)
Step-by-step explanation:
we have
[tex]y< 5-2x[/tex] ----> inequality A
The solution of the inequality A is the shaded area below the dashed line [tex]y=5-2x[/tex]
[tex]x+5y>-7[/tex] ---->inequality B
The solution of the inequality B is the shaded area above the dashed line [tex]x+5y=-7[/tex]
The solution of the system of inequalities is the triangular shaded area between the two dashed lines
If a ordered pair is a solution of the system of inequalities, then the ordered pair must lie on the shaded area
Two points in the solution are(1,2) and (2,-1)see the attached figure
Without using technology, describe the end behavior of f(x) = −3x4 + 7x2 − 12x + 13.
Following are the description on the function behavior:
Given:
[tex]\bold{f(x) = -3x^4 + 7x^2 - 12x + 13}[/tex]
To find:
Function behavior=?
Solution:
We use Power and Polynomial Functions features in the absence of technology. As the function [tex]\bold{f(x) = -3x^4 + 7x^2 -12x + 13}[/tex]
For final behaviour of power functions of such form[tex]\bold{f(x)=ax^n}[/tex] wherein n is a non-negative integer depends on the power and the constant.
So, the leading term, [tex]\bold{f(x)=-3x^4}[/tex]
When the negative constant and even power are:
[tex]\to x \to \infty\\\\\to f(x) \to -\infty[/tex]
At
[tex]x \to -\infty\\\\f(x) \to -\infty[/tex]
Therefore, the final answer is "Down on the left down on the right "
Learn more:
brainly.com/question/13821048
The end behavior of [tex]\( f(x) = -3x^4 + 7x^2 - 12x + 13 \)[/tex] is described as "Down on the left, down on the right," The correct answer is option a) Down on the left, down on the right.
To determine the end behavior of the polynomial [tex]\( f(x) = -3x^4 + 7x^2 - 12x + 13 \)[/tex] without using technology, we analyze the leading term, which dominates the behavior of the function as x approaches positive or negative infinity.
1. Identify the leading term: The leading term of [tex]\( f(x) \) is \( -3x^4 \)[/tex].
2. Consider the degree and leading coefficient:
- The degree of the polynomial is 4.
- The leading coefficient (coefficient of the term with the highest power of [tex]\( x \)) is \( -3 \)[/tex].
3. Determine the end behavior:
- As [tex]\( x \to +\infty \), \( -3x^4 \)[/tex] approaches [tex]\( -\infty \)[/tex] because [tex]\( x^4 \)[/tex] grows much faster than the negative coefficient affects it. Therefore, [tex]\( f(x) \to -\infty \)[/tex].
- As [tex]\( x \to -\infty \)[/tex], [tex]\( -3x^4 \)[/tex] also approaches [tex]\( -\infty \)[/tex] for the same reason. Hence, [tex]\( f(x) \to -\infty \)[/tex].
4. Conclusion: Based on the analysis:
- The polynomial [tex]\( f(x) = -3x^4 + 7x^2 - 12x + 13 \)[/tex] decreases to [tex]\( -\infty \)[/tex] as x goes to both positive and negative infinity.
Therefore, the end behavior of [tex]\( f(x) \)[/tex] is described as "Down on the left, down on the right", which corresponds to option a). This indicates that the graph of [tex]\( f(x) \)[/tex] starts high on the left and continues downward indefinitely in both directions.
Complete question : Without using technology, describe the end behavior of f(x) = −3x4 + 7x2 − 12x + 13.
a Down on the left, down on the right
b Down on the left, up on the right
c Up on the left, down on the right
d Up on the left, up on the right
two tables, congruent trapezoids, are placed together to make a corner desk, as shown
A. 8 square ft
B. 10 square ft
C. 16 square ft
D. 20 square ft
Answer:
D
Step-by-step explanation:
3 and 7 are the main factors so you add them and get 10 but since it’s two equilateral trapezoids then you get another 10 being 20 square feet.
Answer:
D) 20 square feet
Step-by-step explanation:
We are given two congruent isosceles trapezoids and placed together formed to make a corner of the desk.
We need to find the area.
We know that the area of a trapezoid = [tex]\frac{h}{2} [base 1+ base 2][/tex]
Where "h" is the height of the trapezoid.
Given: h = 2 ft, base 1 = 7ft and base 2 = 3ft
Now plug in these values in the above formula, we get
Area of a 1 trapezoid = [tex]\frac{2}{2} [7 + 3][/tex]
= 10 square feet
The two trapezoids are congruent.
So the area of the given figure = 2(10) = 20 square feet.
If x/9 < 2/5 and x is a positive integer, how many distinct values are possible for x?
Answer:
3
Step-by-step explanation:
Solving the inequality gives ...
x/9 < 2/5
x < 18/5 . . . . multiply by 9
Applying the problem restrictions, we have ...
0 < x < 3.6 . . . . . x is an integer
Solutions are {1, 2, 3}. There are 3 distinct possible values for x.
A hotel manager found that his gross recipients for the day, including a 7% sales tax, totaled to $3479.64. Find the amount of sales tax collected.
(I ask for someone to please, quickly, help me answer he question, I can't seem to properly do it myself.)
Answer:
$227.64
Step-by-step explanation:
The relevant relations are ...
sales + tax = total
tax = 7% × sales
Using the second equation, we can write sales in terms of the tax as ...
sales = tax/0.07
Substituting this into the first equation gives ...
tax/.07 + tax = total . . . . . substitute for sales
tax(1/0.07 + 1) = total . . . . factor out tax
tax ((1 +.07)/.07) = total . . . simplify to a single fraction
Multiply by the inverse of this fraction:
tax = .07/1.07 × total = (7/107)($3479.64)
tax = $227.64
Need help with a math question
Answer:
3%
Step-by-step explanation:
We are given the data of number of cars observed waiting in line at the beginning of 2 minute intervals between 3 and 5 p.m. on Friday.
We are to find the probability (in percent) that there is no one in line.
Sum of frequencies = 2 + 9 + 16 + 12 + 8 + 6 + 4 + 2 + 1 = 60
Frequency of no car in line = 2
P (no car in line) = 2 / 60 × 100 = 3.3% ≈ 3%
Find the area of the trapezoid.
For this case we have that by definition, the area of the trapezoid is given by:
[tex]A = \frac {1} {2} (B + b) * h[/tex]
Where:
B: It is the major base
b: It is the minor base
h: It's the height
Substituting the values according to the data of the figure:
[tex]A = \frac {1} {2} (2.1 + 0.9) * 1.3\\A = \frac {1} {2} (3) * 1.3\\A = \frac {1} {2} * 3.9\\A = 1.95[/tex]
Thus, the area of the trapezoid is[tex]1.95 m ^ 2[/tex]
ANswer:
Option B
What is the difference between the two graphs at X = -3
Answer:
5
Step-by-step explanation:
Blue: when x = - 3, y = 5
Green: when x = -3, y = 0
The difference between the two graphs at X = -3 : 5 - 0 = 5
Answer
5
If the volume of the rectangular prism is represented by 6x2 – 2x + 8 and the base area is 2x – 4, which expression represents the height?
The expression that represents the height of the rectangular prism is 3x + (10 / (2x - 4)) found by dividing the given volume expression by the base area expression.
To find the expression that represents the height of the rectangular prism, we need to rearrange the formula for the volume of a prism, which is Volume = Base Area x Height. Given the volume of the rectangular prism as 6x^2
- 2x + 8 and the base area as 2x - 4, we divide the volume by the base area to find the height:
Height = Volume / Base Area
Height = (6x^2 - 2x + 8) / (2x - 4)
This simplifies to:
Height = 3x + (10 / (2x - 4))
Therefore, the expression that represents the height is 3x + (10 / (2x - 4)).
Find the length of segment EC
Step-by-step explanation:
49-30=19, then add 19+16, then you get the answer of 35!
Hope this helps!
I require some assistance with this graphing question, please.
"Use the parabola tool to graph the quadratic function
f(x)=−(x+3)^2+5
Graph the parabola by first plotting its vertex and then plotting a second point on the parabola."
The graph's max on both the X and Y axis is 10, and goes no further.
Any help would be appreciated, but feel free to take your time.
Answer:
vertex (-3,5) and another pt (-2,4)
Step-by-step explanation:
It is in vertex form so the vertex is (-3,5)...
Now just plug in a value for x say like -2...
f(-2)=-(-2+3)^2+5
f(-2)=-(1)^2+5
f(-2)=-1+5
f(-2)=4
So another point is (-2,4)
Answer:
y-int = 5
roots: sqrt(5)-3 or -3 - sqrt(5)
TP @ (-3,5)
Step-by-step explanation:
y intercept = 5 (when x = 0)
Roots:
When y = 0
5 - (x + 3)^2 = 0
(x+3)^2 = 5
Square both sides:
x + 3 = Sqrt[5] or x + 3 = - Sqrt[5]
x = Sqrt[5] - 3 or x= - 3 - Sqrt[5]
Turning point (Critical Point):
dy/dx (5-(x+3)^2) = - 2 (x+3)
Solve -2 (x+3) = 0
x = - 3
y = 5
Max point at (-3,5)
Find the average value of y equals the square root of the quantity 64 minus x squared, on its domain.
Answer:
2π ≈ 6.283
Step-by-step explanation:
The average value of the function is the area under it, divided by the base. This function describes a semicircle of radius 8, so its area is ...
A = 1/2πr² = 1/2π·8² = 32π
The width of the base is the diameter of the semicircle, so is 16. Then the average value is ...
32π/16 = 2π . . . . . average value of y
The vertex of this parabola is at (2, -4). When the x-value is 3, the yvalue is -1. What is the coefficient of the squared expression in the parabola's equation?
Answer:
3
Step-by-step explanation:
Fill in the known values in the vertex form equation and solve for the coefficient.
y = a(x -h)^2 +k
-1 = a(3 -2)^2 -4 = a -4 . . . . fill in the values and simplify
3 = a . . . . . . . . . . . . . . . . . . .add 4
The coefficient of the squared expression is 3.
Final answer:
The coefficient of the squared term in the parabola's equation, given the vertex (2, -4) and a point (3, -1) on the parabola, is found to be 3 by substituting these values into the vertex form of a parabola's equation.
Explanation:
The student is asking how to determine the coefficient of the squared term in a parabola's equation, given the vertex and a point on the parabola. The standard form of a parabola's equation with vertex (h, k) is [tex]y = a(x - h)^2 + k,[/tex] where a is the coefficient in question. Knowing the vertex at (2, -4) and a point (3, -1) on the parabola, we can substitute these into the equation to find a.
Substituting the vertex into the equation gives us the form [tex]y = a(x - 2)^2 - 4.[/tex] Then we substitute the point (3, -1):
[tex]-1 = a(3 - 2)^2 - 4[/tex]
[tex]-1 = a(1)^2 - 4[/tex]
-1 + 4 = a · 1
a = 3
Therefore, the coefficient of the squared expression in the parabola's equation is 3.
Use long division or synthetic division to find the quotient of
Answer:
2x^2-x+1
Step-by-step explanation:
Answer:
2x² - x + 1
Step-by-step explanation:
[tex]\frac{(2x^{2}-x+1)(x+1)}{(x+1)} = 2x^{2}-x+1[/tex]
The probability that an event will occur is 7/8 which of these best describes the likehood of the even occurring
Very Likely
think of it this way
you have a 7/8 chance of getting electrocuted by sticking your hand in the toaster
you have a 1/8 chance of this event not occurring when you stick said hand in the toaster
so its VERY LIKELY that you will be electrocuted if you stick your hand in a toaster
hope that helps!
Determine the asymptotes of the function: y=x^3-5x^2+4x-25/x^2-4x+3
(horizontal, vertical or slant)
Answer:
Vertical A @ x=3 and x=1
Horizontal A nowhere since degree on top is higher than degree on bottom
Slant A @ y=x-1
Step-by-step explanation:
I'm going to look for vertical first:
I'm going to factor the bottom first: (x-3)(x-1)
So we have possible vertical asymptotes at x=3 and at x=1
To check I'm going to see if (x-3) is a factor of the top by plugging in 3 and seeing if I receive 0 (If I receive 0 then x=3 gives me a hole)
3^3-5(3)^2+4(3)-25=-31 so it isn't a factor of the top so you have a vertical asymptote at x=3
Let's check x=1
1^3-5(1)^2+4(1)-25=-25 so we have a vertical asymptote at x=1 also
There is no horizontal asymptote because degree of top is bigger than degree of bottom
There is a slant asympote because the degree of top is one more than degree of bottom (We can find this by doing long division)
x -1
--------------------------------------------------
x^2-4x+3 | x^3-5x^2+4x-25
- ( x^3-4x^2+3x)
--------------------------------
-x^2 +x -25
- (-x^2+4x-3)
---------------------
-3x-22
So the slant asymptote is to x-1
Answer: D
Step-by-step explanation:
EDGE 2021
HELP ASAP!! Lara starts from the school, which is 5 miles west and 7 miles north of the house. She travels 20 miles south, and then 15 miles east. What is her final position? What single translation vector moves her from her starting position to her final position?
Answer:
(10, −13); (15, −20)
Step-by-step explanation:
Identify the graph that has a vertex of (1,-1) and a leading coefficient of a=2.
ANSWER
[tex]f(x) = 2 ({x - 1)}^{2} - 1[/tex]
EXPLANATION
The vertex form of a parabola has equation:
[tex]f(x) = a ({x - h)}^{2} + k[/tex]
where V(h,k) is the vertex of the parabola and 'a' is the leading coefficient.
From the question, we have that, the vertex is
[tex](1,-1)[/tex]
and the leading coefficient is
[tex]a= 2[/tex]
We substitute the vertex and the leading coefficient into the vertex form to get:
[tex]f(x) = 2 ({x - 1)}^{2} + - 1[/tex]
We simplify to get:
[tex]f(x) = 2 ({x - 1)}^{2} - 1[/tex]
The graph of this function is shown in the attachment.
The graph that has a vertex of (1,-1) and a leading coefficient of a=2 is a parabola.
Explanation:The graph that has a vertex of (1,-1) and a leading coefficient of a=2 is a parabola. The leading coefficient, which is the coefficient of the squared term, determines the nature of the parabola.
Since the leading coefficient is positive, the parabola opens upward. The equation of the parabola can be written in the form y = ax^2 + bx + c, where a represents the leading coefficient.
Therefore, the equation of the graph is y = 2x^2 - 4x + 1.
Which shows one way to determine the factors of 4x^3+x^2-8x-2
For this case we must factor the following expression:
[tex]4x ^ 3 + x ^ 2-8x-2[/tex]
We group the first two and the last two terms:
[tex](4x ^ 3 + x ^ 2) + (- 8x-2)[/tex]
We factor the highest common denominator of each group:
[tex]x ^ 2 (4x + 1) -2 (4x + 1)[/tex]
We take the common factor[tex]4x + 1:[/tex]
[tex](4x + 1) (x ^ 2-2)[/tex]
Answer:
[tex](4x + 1) (x ^ 2-2)[/tex]
PLEASE HELP!11 25 POINTS The volume of a right rectangular prism can be determined by multiplying the base area of the figure by the height. The volume of a right rectangular prism with a base area of 8 square inches is more than 64 cubic inches. The inequality 8h > 64 can be used to model the situation, where h represents the height of the figure. Which is a possible value of h?
a. 2
b.4
c.8
d.12
Answer:
12
Step-by-step explanation:
The only possible answer if 12 because all of the other choices come to the conclusion that 8h ≤ 64
if h=12 then 8h= 8 * 12 = 96 > 64
The value of h is 12.
What is the volume of a rectangular prism?Multiply the length, width, and height of a rectangular prism to determine its volume. Cubic measurements are used to express volume.
Given,
The only possible answer is 12 because all of the other choices come to the conclusion that 8h ≤ 64
if h=12 then 8h= [tex]8 * 12[/tex] = 96 > 64
To know more about rectangular prism refer to :
https://brainly.com/question/477459
#SPJ2
mary is solving the equation 5^x + 4 =11. her first steps are shown.
step 1. 5^x + 4 =11
step 2. 5^x =7
step3. In5^x=In7
which shows step 4?
A. In 5 = x In 7
B. x In 5 = In 7
C. ^-In 5 = In 7 * x
D. x = In 7 - In 5
Answer:
Option B. x In 5 = In 7
Step-by-step explanation:
we have
[tex]5^{x}+4=11[/tex]
step 1
[tex]5^{x}+4=11[/tex]
step 2
Subtract 4 both sides
[tex]5^{x}+4-4=11-4[/tex]
[tex]5^{x}=7[/tex]
step 3
Apply ln both sides
[tex]ln(5^{x})=ln(7)[/tex]
step 4
[tex]xln(5)=ln(7)[/tex]
step 5
Divide by ln(5) both sides
[tex]x=ln(7)/ln(5)[/tex]
HEEEEELP ME ITS MATH I NEED THIS FAST PICTURE BELOW
See the attached picture for the answer.
PLEASE HELP ME WITH THIS MATH QUESTION
Answer:
r=4ft
h=8ft
Area of cyclender=?
by using formula,
A=πr²h
=22/7×4²×8
=402.28ft²Ans.
ANSWER
301.6 ft²
EXPLANATION
The surface area of a cylinder is calculated using the formula;
[tex]S.A = 2\pi \: r(r + h)[/tex]
From the diagram the height of the cylinder is 8 feet and the radius is 4 feet.
We substitute the values into the formula to obtain,
[tex]S.A = 2\pi \: 4(4+ 8)[/tex]
This simplifies to:
[tex]S.A = 8\pi \: (12)[/tex]
[tex]S.A = 96\pi[/tex]
Or
[tex]S.A = 301.6 {ft}^{2} [/tex]
to the nearest tenth.
An aeroplane at an altitude of 200m observes the angle of depression of opposite points on the two banks of a river to be 45 and 60 find the widht of river
Answer:
84.5 m
Step-by-step explanation:
It is often helpful to draw a diagram for word problems involving geometric relationships. One for this problem is shown below.
The mnemonic SOH CAH TOA reminds you of the relationship between sides of a right triangle:
Tan = Opposite/Adjacent
Here we're given angles of depression measured from the horizontal (as shown in the diagram), but it is more convenient to use angles measured from the vertical. In particular, ∠BAO is the complement of 60°, and its tangent is the ratio OB/OA:
tan(30°) = OB/OA
OB = (200 m)·tan(30°) ≈ 115.47 m . . . . . . multiply by OA, use OA=200 m
Likewise, we have ...
OC = (200 m)·tan(45°) = 200 m
Then the width of the river is the difference between these values:
BC = OC -OB = 200 m - 115.47 m = 84.53 m
The product is k2 – k + .
Come on, now. Incomplete question.
Answer:
is it late now
Step-by-step explanation:
1. Write the equation of a line in slope-intercept form that has a slope of -1/4 and passes through the point (8, -1).
2. Write the equation of a line in point-slope form that has a slope of -1 and passes through the point (-2, 5).
These are my last 2 questions thank you everyone for all the help!!
Answer:
see explanation
Step-by-step explanation:
1
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
here m = - [tex]\frac{1}{4}[/tex], hence
y = - [tex]\frac{1}{4}[/tex] x + c ← is the partial equation
To find c substitute (8, - 1) into the partial equation
- 1 = - 2 + c ⇒ c = - 1 + 2 = 1
y = - [tex]\frac{1}{4}[/tex] x + 1 ← in slope- intercept form
2
The equation of a line in point- slope form is
y - b = m(x - a)
where m is the slope and (a, b) a point on the line
here m = - 1 and (a, b) = (- 2, 5), hence
y - 5 = - (x - (- 2)), that is
y - 5 = - (x + 2)