Answer:
the original price of the book is $20
Step-by-step explanation:
sometimes in a question, they put things in the question that don't actually help us get to the answer. usually we ignore it, but i'm going to list them out just to help you a bit more.
Things that are useless:
his name is Jarred (his name could be gary, it doesn't affect us getting the answer)he went to a bookstore (he could've gone to the library, it wont affect us getting to the answer)the book is softcover (it could be any type of book, wont affect us getting to the answer)the item is a book (it could be anything that he bought, wont affect us getting to the answer.)Things that are helpful:
the book was on sale (helps us know that the price was reduced)the book was on sale 10% (helps us know how much it was reduced by)he spent $18 for the reduced price (helps us know how much he spent)Ok, now that we know those, let's work on the question.
let b be the original book price
we need to find 10% so we have to use 90% (because 100 - 10 = 90)
if we needed to find 20% we would use 80% (because 100 - 20 = 80)
and so on.
90% of b = 18 (90% of the og. book price equals 18)
90/100 × b = 18 (write a correct equation and make the percent a fraction)
9/10 × b = 18 (simplify both sides of the equation)
9 × b = 180 (multiply both sides of the equation to get rid of fraction)
b = 20 (divide both sides of the equ. to get b by itself)
the original price of the book is $20
hope this helped :D
good luck my friend
- cheesetoasty
it is 4.5 miles from moulton to filby via Burnham and denton how far is it between denton and filby
Answer: I think that the answer is 3/4 miles
Step-by-step explanation:
Tim left $3000 in an account that
paid 8% interest compounded
annually. How much interest did
Tim earn in 2 years?
Answer:
499.20
Step-by-step explanation:
3000
x.08. Interest rate
= 240 interest after one year
+. 3000
=3,240 principal plus interest after one year
x. .08
259.20. Interest in year two
+ 240.00 interest in year one
= 499.20. Interest earned in 2 years
i start with y, add 5 and then, double the result
Answer:
2y + 10Step-by-step explanation:
i start with y, add 5 and then, double the result
y add 5
y + 5 double the result
(y + 5) × 2 solve
2y + 10
or
(y + 5) × 2 =
2y + 10
Find the distance of the line segment below.
___ units
Answer:
let (5,4)=(x1,y1)
(-3,-2)=(x2,y2)
now, by using distance formula
we get distance between line segment =10 unit
therefore distance =10 units ans
Solution,
As the formula...
\( = \sqrt{( - 3 - 5 {)}^{2} + ( - 2 - 4 {)}^{2} } \)
\( = \sqrt{( - 8 {)}^{2} + ( - 6 {)}^{2} } \)
\( = \sqrt{64 + 36} \)
\( = \sqrt{100} \)
= 10 units...
☘☘☘....
A political candidate has asked you to conduct a poll to determine what percentage of people support her.
If the candidate only wants a 5% margin of error at a 99% confidence level, what size of sample is needed?
Give your answer in whole people.
ME=8%=0.08
CL=90%=1.645
n=?
Answer:
666
Step-by-step explanation:
From this question,
a = 1-99%
a = 1-0.99
a = 0.01
5% = z(0.05) = 2.58 when we check the standard normal table
Therefore we calculate n as:
n = (z/E)²*p*1-p
Z = 2.58
E = 0.05
P = 0.5
1-p = 0.5
(2.58/0.05)²x0.5x0.5
= 51.6²x0.5x0.5
= 665.64
Therefore n is approximately 666.
Help me please!...ffddfdf
Answer:
Radius:3.5 or 7/2
Diameter:7
Step-by-step explanation:
The diameter is given, and the radius is half of the diameter because it's from the middle of the circle to the edge. Divide 7 by two and you get radius
Graph the solution to the equations below. y = 1 4 x + 2 and y = −2x −7
HELP ME PLEASE SOMEONE
Answer:
x = 3
Step-by-step explanation:
15x + 8 and 9x + 26 are corresponding angles and are congruent , then
15x + 8 = 9x + 26 ( subtract 9x from both sides )
6x + 8 = 26 ( subtract 8 from both sides )
6x = 18 ( divide both sides by 6 )
x = 3
A random sample of 250 students from ASU with a total population of 7,500 students is surveyed about their college majors. In the sample, 75 students said that they are majoring in Art. Based on these results, predict how many students in the total population are Art majors
We can predict that there are approximately 2,250 Art majors in the total population of 7,500 students at ASU based on the sample data.
We have,
We can use the formula for estimating population proportion:
Population proportion = sample proportion x population size
where the sample proportion is the fraction of students in the sample who are Art majors, and the population size is the total number of students in the population.
From the sample of 250 students, 75 said that they are majoring in Art, so the sample proportion of Art majors.
sample proportion = 75/250 = 0.3
The population size is 7,500 students.
Using the formula above, we can estimate the number of Art majors in the total population:
population proportion = sample proportion x population size
population proportion = 0.3 x 7,500
population proportion = 2,250
Therefore,
We can predict that there are approximately 2,250 Art majors in the total population of 7,500 ASU students based on the sample of 250 students surveyed.
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I’ll pay $20 in cashapp for whoever can do this
Answer:
10
Step-by-step explanation:
What's the difference between 1.2 x 10e7and 4.6 x 10e4? Express your answer using either standard notation or scientific notation.
1.2 x 10e7 is a higher demand of 4.6 dived to the 10th
f(x)=2x-8 and g(x)=1/2x+4
compose the two given functions and simplify
Composing f(x)=2x-8 and g(x)=1/2x+4 results in the identity function, f(g(x)) = x.
How to compose f(x)=2x-8 and g(x)=1/2x+4To compose the two functions, we substitute g(x) into f(x) in place of x:
f(g(x)) = 2(g(x)) - 8
= 2(1/2x + 4) - 8
= x + 8 - 8
= x
Therefore, composing the two functions results in the identity function, f(g(x)) = x.
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Dontrell bought 5 1/2 pounds of potatoes for $3.52. What equation can be used to represent the total amount he paid, y, for x pounds of potatoes?
Enter the correct equation in the box.
____________________
The equation for total amount to be paid represented as y and pounds of potatoes represented as x will be y = 0.64x
What is linear equation?Ax + By + C = 0 can be used to express a linear equation in two variables, where x and y are the two variables, and each has a degree of one.
Ex. -2x+3y=8
Total weight of potatoes in pounds Dontrell bought= x
Let total amount Dontrell he pays= $ y
It is given 5.5 pounds are bought by paying $3.52
5.5 pounds = $3.52
1 pound = $ 3.52/5.5
1pound=$0.64(Using Unitary method)
Dontrell buy x pounds potatoes and he pays $y
Therefore,
y=0.64x
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URGENT! Please explain how to get the last two answers (where t = 6 and t = -7).
Answer:
See explanation below
Step-by-step explanation:
We have t as a real number.
The reference number associated with t is the shortest distance along the unit circle between the terminal point determined by t and the x-axis.
c. look at the attachment
π = 90° => 2π = 180°
π = 3.14 => 2π = 6.28
so t = 6 is less than 2π
so t' = 2π - t = 2π - 6
d. same principle but direction will go clockwise rather than counterclockwise in (+) number
π = 90° => 2π = 180°
π = 3.14 => 2π = 6.28
so we ignore the (-) since it is the direction
t = 7 which is more than 2π
so t' = -7 - 2π
you have -7 because the difference will be negative which points to direction of clockwise
Give me brainliest if this helps you.
Find the maximum and minimum points of the function y = –2 cos (x + π/2) + 1.
The maximum and minimum points of the function are (a) (3π/2, -1) (-π/2, -1), (π/2, 3)
How to determine the maximum and minimum points of the function?From the question, we have the following function that can be used in our computation:
y = –2 cos (x + π/2) + 1.
Calculating the maximum
Here, we have
y = –2 cos (x + π/2) + 1.
Next, we plot the graph of the function
From the graph of the function, we have the maximum points to be (π/2, 3)
Calculating the minimum
Here, we have
y = –2 cos (x + π/2) + 1.
Next, we plot the graph of the function
From the graph of the function, we have the minimum points to be
(3π/2, -1) (-π/2, -1)
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O.5% as a fraction and decimal
Answer: As a fraction: 1/2
As a decimal: 0.005
Step-by-step explanation:
FRACTION:
To figure out how to write 0.5% as a fraction, all you need to know is that 0.5 = to a half, or 1/2 because 0.5 is half of 1.
DECIMAL:
0.5% as a decimal form is 0.005 because it is 1000 times less than 1, so you move the 0 3 times right.
5. You buy a boat for $35,000 that * 10 points
depreciates in value at about 17%
per year. How much will it be worth
in 3 years?
Your answer
Answer:
9000
Step-by-step explanation:
Can you please find and solve the unknown variable.
The value of x is; x = 3.14
Here, we have,
from the given diagram, we get,
there is a right angle triangle.
we have to find the value of x.
we know that,
Let the angle be θ , such that
cos θ = base / hypotenuse
here, we get,
cos 17 = 3/x
so, we have,
0.956 = 3/x
so, x = 3.14
Hence, The value of x is;x = 3.14
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6(3x+4)+2(2x+2)+2=22x+31 solve the equation for the given variable
The equation 6( 3x + 4 ) + 2( 2x + 2 ) + 2 = 22x + 31 has no solution for the variable x.
What is the solutuon to the given equation?Given the equation in the question:
6( 3x + 4 ) + 2( 2x + 2 ) + 2 = 22x + 31
To solve the equation 6(3x + 4) + 2(2x + 2) + 2 = 22x + 31 for the variable x, we will simplify and solve for x.
Apply distributive property:
6 × 3x + 6 × 4 + 2 × 2x + 2 × 2 + 2 = 22x + 31
18x + 24 + 4x + 4 + 2 = 22x + 31
Collect and combine like terms on both sides:
22x + 30 = 22x + 31
Next, we want to isolate the variable x on one side.
22x - 22x + 30 = 22x - 22x + 31
30 = 31
However, we notice that the x terms cancel out when subtracted:
30 ≠ 31
This means that there is no solution.
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A 25-foot-long footbridge has two diagonal supports that meet in the center of the bridge. Each support makes a 65∘ angle with a short vertical support.
What is the length x of a diagonal support, to the nearest tenth of a foot?
x≈_____ feet
Drag and drop the relationships below to classify them as being a function or not a function?
A relation that has more than one output of each input. That is not a function. A function only has one output of each input. Function a and function b are linear functions. Function a is represented by the table values. function b is represented by the equation y=3x+4.
Determine the domain of a piece wise function?Domain, is a term that is used to measure the independent variable’s values. Also known as the “x” values. It tells you what values of “x” are applicable in the function. What values will satisfy the function.
Determine the range of a piece wise function?Range, is a term used to measure the dependent variable’s values. Also known as the “y” values. It tells you what values of why does the graph of the function extends till.
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Please help me with this proof.
Answer:
See below
Step-by-step explanation:
For the second step, \(\angle T\cong\angle R\) by Alternate Interior Angles. The rest of the steps appear to be correct.
What are the coordinates of the point on the directed line segment from (-2,-6) to (6,−2) that partitions the segment into a ratio of 3 to 1?
The coordinates of the point that partitions the segment into a ratio of 3 to 1 are (4, -3).
To find the coordinates of the point that partitions the directed line segment from (-2, -6) to (6, -2) into a ratio of 3 to 1, we can use the concept of linear interpolation.
First, we need to determine the total distance of the line segment. We can use the distance formula to calculate this:
\(d = \sqrt{((x2 - x1)^2 + (y2 - y1)^2)}\)
\(=\sqrt{((6 - (-2))^2 + (-2 - (-6))^2)}\)
\(= \sqrt{(8^2 + 4^2)}\)
\(= \sqrt{(64 + 16)}\)
\(= \sqrt{(80)}\)
= 4√5
Next, we calculate the distance from the starting point (-2, -6) to the partition point.
Since the ratio is 3 to 1, the distance to the partition point is (3/4) of the total distance:
distance = (3/4) \(\times\) (4√5)
= 3√5
Now, we can determine the coordinates of the partition point.
We move 3√5 units from (-2, -6) in the direction of the line segment.
To find the coordinates, we calculate the change in x and y values:
change in x = (3/4) \(\times\) (6 - (-2))
= (3/4) \(\times\)8
= 6
change in y = (3/4) \(\times\) (-2 - (-6))
= (3/4) \(\times\) 4
= 3
Adding the changes to the starting point coordinates, we get:
x = -2 + 6
= 4
y = -6 + 3
= -3
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PLEASE HELP WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
The notation Σ-2 (3η + 5) is incorrect for representing the arithmetic series 8 + 11+ ... + 29.
The correct notation for the arithmetic series 8 + 11 + ... + 29 should be:
Σ_{i=1}^{11} (6i + 2)
The series has 11 terms, and each term can be found by adding 3 to the previous term, starting with the first term 8. Therefore, the general form of the series is 6i + 2, where i represents the index of the term in the series.
In contrast, the notation Σ-2 (3η + 5) appears to have multiple errors. The use of a negative index (-2) is not valid, as the index should start from 1 or 0. Also, the use of the Greek letter eta (η) instead of i as the index variable is unconventional and likely to cause confusion. Finally, the expression inside the parentheses does not appear to correspond to the terms of the arithmetic series.
The correct notation for the arithmetic series 8 + 11 + ... + 29 should be:
Σ_{i=1}^{11} (6i + 2)
To explain the error in the given notation Σ-2 (3η + 5), we can break it down as follows:
The use of a negative index (-2) is incorrect. The index of summation should always be a non-negative integer.
The use of the Greek letter eta (η) instead of i as the index variable is unconventional and may cause confusion or errors.
The expression inside the parentheses, 3η + 5, does not represent the terms of the arithmetic series. In particular, it does not involve the index variable i or the common difference 3.
Therefore, the correct notation for the given arithmetic series is Σ_{i=1}^{11} (6i + 2).
13.5% of 1400 round to nearest hundredths
Answer:
189
Step-by-step explanation:
(13.5 / 100) 1400 = 189
yw ;)
What are the exact solutions of x2 − 3x − 1 = 0 using x equals negative b plus or minus the square root of the quantity b squared minus 4 times a times c all over 2 times a? (1 point) x = the quantity of 3 plus or minus the square root of 5 all over 2 x = the quantity of negative 3 plus or minus the square root of 5 all over 2 x = the quantity of 3 plus or minus the square root of 13 all over 2 x = the quantity of negative 3 plus or minus the square root of 13 all over 2
Answer:
Step-by-step explanation:
x² - 3x - 1 = 0
a = 1, b = -3, c = -1
x₁ = (3 + sqrt(-3² - 4(1(-1))))/(2(1))
x₁ = (3 + sqrt(9 + 4))/2
x₁ = (3 + sqrt(13))/2
x₁ = 3.302...
x₂ = (3 - sqrt(-3² - 4(1(-1))))/(2(1))
x₂ = (3 - sqrt(9 + 4))/2
x₂ = (3 - sqrt(13))/2
x₂ = -0.302...
explain why 6/8 size parts is the same amount as 3/4 size parts
Answer:
they are the same amout, this is why. 4 is a factor of 8, so you can multiply the fraction 3/4 by 2 so both fractions have the same denominater. once you do that you see that your new fraction is also 6/8 because 3 times 2 = 6 and 4 times 2 = 8.
Step-by-step explanation:
hope this helps!
Convert the rectangular coordinates (5,−5√3) to polar form. Let r>0 and 0≤θ<2π.
Enter your answer by filling in the boxes. Enter coordinates as simplifed fractions or radicals in simplest form.
( , )
Answer:
(10, 5π/3)
Step-by-step explanation:
To convert rectangular coordinates (5, -5√3) to polar form, we can use the following formulas:
r = √(x^2 + y^2)
θ = arctan(y/x)
Substituting the given values, we get:
r = √(5^2 + (-5√3)^2) = √(25 + 75) = √100 = 10
θ = arctan((-5√3)/5) = arctan(-√3) = -π/3
Note that the value of θ is in the fourth quadrant, which corresponds to a negative angle. However, we need to express the angle θ in the range 0 ≤ θ < 2π. To do this, we can add 2π to the angle if it is negative:
θ = -π/3 + 2π = (5π/3)
Therefore, the rectangular coordinates (5, -5√3) in polar form are (10, 5π/3).
If you decide to study 4 hours more a week during your junior year (32 weeks) with the expectation of getting $2,000 scholarship to college how much is your study time worth per hour
Answer: You will get $2,000 for 128 hour, or 2,000/128 = $15.625 per hour study time.
Step-by-step explanation:
We will give the solution of the following problem:
"If you decided to study for four hours a week during your junior year (32 weeks) with the expectation of getting a $2,000 scholarship to college, how much is your study time worth per hour?"
In 32 weeks you will have total of 4*32 = 128 study hours.
You will get $2,000 for 128 hour, or 2,000/128 = $15.625 per hour study time.
Solve the equation using the zero-product principle.(x-9) (5x + 9) = 0
In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data:
(x - 9) (5x + 9) = 0
Step 02:
zero-product principle:
(x - 9) (5x + 9) = 0
(x - 9) = 0
x - 9 = 0
x = 9
(5x + 9) = 0
5x + 9 = 0
5x = - 9
x = - 9 / 5
The answer is:
x1 = 9
x2 = - 9 / 5