Answer:
B. $8.86
Step-by-step explanation:
$1.88 * 3 plastic bracelets = $5.64
$1.23 for one hair ribbon
$5.64 + $1.23 = $6.87
$15.73 - $6.87 = $8.86
What is the length of the line segment that joins (3, -2) and (3, 9)
Step-by-step explanation:
[tex] \sqrt{3 - 3} + \sqrt{9 - - 2} [/tex]
[tex] \sqrt{0} + \sqrt{11} [/tex]
[tex] \sqrt{11} [/tex]
Thats the answer of distance
if f is a signum function then f(100) =
Answer:
787
Step-by-step explanation:
i took the test
A student received a score of 38/50 on a math test and wants to convert the points into percentages.
An important step in the process involves dividing the
number of incorrect answers by the number of correct answers.
number of correct answers by the number of incorrect answers.
total number of questions by the number of correct answers.
number of correct answers by the total number of questions.
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Answer:
number of correct answers by the total number of questions
Step-by-step explanation:
The first step in the process is to express the score as a fraction. That has already been done here, but apparently, we're to say what that fraction is.
The required fraction that must be found as a first step is found by dividing the ...
number of correct answers by the total number of questions
Answer:
number of correct answers by the total number of questions
Step-by-step explanation:
source : m4thw4y
While doing an article on the high cost of college education, a reporter took a random sample of the cost of new textbooks for a semester. Her sample consisted of 20 students with a mean of $212.45 and a standard deviation of $38.92. A. Find the 99% confidence interval estimate of the true mean textbook cost for the semester based on her sample. Assume the cost of new textbooks is normally distributed.B. Based on part a, is an average cost of $200 for a semester a likely value for the population mean? Why or why not?
Answer:
The answer is below
Step-by-step explanation:
Given that:
mean (μ) = $212.45, standard deviation (σ) = $38.92 and sample size (n) = 20 students.
a) Confidence (C) = 99% = 0.99
α = 1 - C = 1 - 0.99 = 0.01
α/2 = 0.01/2 = 0.005
The z score of α/2 is the same as the z score of 0.495 (0.5 - 0.005) which is equal to 2.576. This means that Z(α/2) = 2.576
The margin of error (E) is given as:
[tex]E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } \\\\Substituting:\\\\E=2.576*\frac{38.92}{\sqrt{20} } \\\\E=8.7[/tex]
The confidence interval = (μ ± E) = (212.45 ± 8.7) = (203.75, 221.15)
Hence the 99% confidence interval is between 203.75 and 221.15.
b) The population mean is the same as the sample mean. Hence the population mean = $212.45
PLEASE HELP MEEEEEE I REALLY NEED HELP WITH THISSSSSSSSS QUESTION PLEASE I NEEEEDDD HELPPPP IM BEGGGING YOUUUU
Answer:
volume of figure = 74 cm³
The line passes through the point (-2,-5) and has a slope of -3.
Answer:
y = - 3x -11
Step-by-step explanation:
(x₁ , y₁) = (-2 , -5) & m = -3
y - y₁ = m (x - x₁)
y - [-5] = (-3)(x -[-2])
y + 5 = (-3)(x + 2)
y + 5 = -3x - 6
y = -3x - 6 - 5
y = - 3x -11
HELP WILL GIVE BRAINLIEST IF CORRECT
Answer:
B. No, the remainder is -50.
General Formulas and Concepts:
Algebra I
Roots are when the polynomial are equal to 0Algebra II
Synthetic DivisionStep-by-step explanation:
Step 1: Define
Function f(x) = x³ - 10x² + 27x - 12
Divisor/Root (x + 1)
Step 2: Synthetic Division
See Attachment.
To determine whether a given root is an actual root, the remainder must equal 0. Since we have a remainder of -50, the given root is not a factor of the polynomial.
Please excuse the bad handwriting. Hope this helped!
The table lists selected values of Sam's walking speed, in kilometers per hour (km/h), and his corresponding
pulse, in beats per minute (bpm). There is a linear relationship between Sam's speed, x, and his pulse, f(x).
Which of the following equations describes f(x)?
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Answer:
(C) f(x) = 5x +57
Step-by-step explanation:
Heart rate increases as speed increases, so only equations with a positive x-coefficient are of interest. It is pretty easy to see that ...
f(x) = x+57
doesn't give ...
f(4) = 77
However, the other reasonable choice is ...
f(x) = 5x +57
which does give f(4) = 77.
Eli's family is going to have
a big go-cart race and each
go-cart takes 32 gallon of
gas. If there are 7 go-carts,
how many total gallons of
gas do they need to fill up
all the go-carts?
Answer:
224
Step-by-step explanation:
32 times 7
The length of a beige is 500 miles if 1 inch represent 25 miles what is the length of the bridge ?
Answer:
20 inch
Step-by-step explanation:
500 divided by 25 is 20.
can someone help me out with this problem?...REAL ANSWERS ONLY
In ΔNOP, p = 9.5 cm, n = 2.7 cm and ∠O=35°. Find the length of o, to the nearest 10th of a centimeter.
Answer:
7.5
Step-by-step explanation:
DeltaMath
Increase £15837.77 by 8.5%
Answer:
32,100 Millimeters
3,210 Centimeters
3.21 Decameters
Hope It Helps
Step-by-step explanation:
Find the value of x that will make A||B.
А
5X
(4x + 12
x
< = [?]
Answer:
x=12
Step-by-step explanation:
Lines A and B are parallel, with a transversal passing through them.
The properties of two parallel lines and a transversal tells us that angles 5x and 4x+12 must be equal, because they are a pair of alternate exterior angles.
To solve for x, we do 5x=4x+12
Subtract 4x on both sides
x=12
Answer: 12
Step-by-step explanation:
2. O
Mia buys ink at the office supply store for a business.
She buys 3 printer cartridges, and the sales tax is 7%. Write an expression
to represent the total cost of ink supplies in two different ways.
Answer:
The total cost of the ink supplies can be represented in two different ways, as follows:
a. 3p (1+r)
b. p * (1+ r) * 3
Step-by-step explanation:
a) Data and Calculations:
Number of printer cartridges bought = 3
Sales tax rate = 7%
The total cost can be represented as:
Total cost = 3p (1+r)
where p = the price of a printer cartridge
and r = the sales tax rate
Alternatively, the total cost can be represented as:
Total cost = p * (1+ r) * 3
b) Whichever expression is used, the total cost derived will remain the same. The first expression includes the sales tax in the total cost, while the second expression includes the sales tax in the cost of the unit before arriving at the total cost.
Answer:
3c+3c(0.07)
Step-by-step explanation:
NEGATIVE INTEGER LESS THAN -5
Answer:
-6
Step-by-step explanation:
-6, -7, -8... and so on are less than -5
Answer:
-6, -7, -8... etc.
Step-by-step explanation:
Use GEMS to evaluate the expression when x=5
3x - (-2 + 4x)
PLEASE HELP!
Answer:
how to get gems?
Step-by-step explanation:
I need help please!!! I will give five stars and Brainiest for correct answer.
Answer:
in my thought 4isthe answer
Inverse Rational Function:
g(x)=6x-1/4x+7
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Answer:
g^-1(x) = (7x+1)/(6 -4x)
Step-by-step explanation:
Substitute y for x and solve for y.
g(y) = x
(6y -1)/(4y +7) = x
6y -1 = x(4y +7) . . . . multiply by 4y+7
6y -4xy = 7x +1 . . . . add 1-4xy
y(6 -4x) = 7x +1 . . . . factor out y
y = (7x +1)/(6 -4x) . . . divide by the coefficient of x
[tex]\boxed{g^{-1}(x)=\dfrac{7x+1}{6-4x}}[/tex]
A person invests 2000 dollars in a bank. The bank pays 6.25% interest compounded semi-annually. To the nearest tenth of a year, how long must the person leave the money in the bank until it reaches 5900 dollars?
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Answer:
17.6 years
Step-by-step explanation:
The compound interest formula is useful for figuring this out.
A = P(1 +r/n)^(nt) . . . . . interest r compounded n per year for t years
Filling in the given values and solving for t, we have ...
5900 = 2000(1 +.0625/2)^(2t)
2.95 = 1.03125^(2t) . . . . divide by 2000, simplify
log(2.95) = 2t×log(1.03125) . . . . take logarithms
t = log(2.95)/(2×log(1.03125) . . . . divide by the coefficient of t
t ≈ 17.6
The person must leave the money in the bank for 17.6 years.
(b) Given one of the zeros of equation 2x³ - 23x + 78x +k=0 is 3/2
Find value k, hence,
solve the equation.
Answer:
k = -55 x - 2 x^3
Step-by-step explanation:
Solve for k:
2 x^3 + 55 x + k = 0
Hint: | Solve for k.
Subtract 2 x^3 + 55 x from both sides:
Answer: k = -55 x - 2 x^3
3/2 is not a Root of this equation - see below, those are the Roots/Zeros.
Solve for x:
2 x^3 + 55 x + k = 0
Divide both sides by 2:
x^3 + (55 x)/2 + k/2 = 0
Change coordinates by substituting x = y + λ/y, where λ is a constant value that will be determined later:
k/2 + 55/2 (y + λ/y) + (y + λ/y)^3 = 0
Multiply both sides by y^3 and collect in terms of y:
y^6 + y^4 (3 λ + 55/2) + (k y^3)/2 + y^2 (3 λ^2 + (55 λ)/2) + λ^3 = 0
Substitute λ = -55/6 and then z = y^3, yielding a quadratic equation in the variable z:
z^2 + (k z)/2 - 166375/216 = 0
Find the positive solution to the quadratic equation:
z = 1/36 (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)
Substitute back for z = y^3:
y^3 = 1/36 (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)
Taking cube roots gives (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3)/6^(2/3) times the third roots of unity:
y = (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3)/6^(2/3) or y = -((-1)^(1/3) (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3))/6^(2/3) or y = ((-1)^(2/3) (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3))/6^(2/3)
Substitute each value of y into x = y - 55/(6 y):
x = (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3)/6^(2/3) - 55/(6^(1/3) (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3)) or x = -(55 (-1)^(2/3))/(6^(1/3) (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3)) - ((-1)^(1/3) (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3))/6^(2/3) or x = (55 ((-1)/6)^(1/3))/(sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3) + ((-1)^(2/3) (sqrt(3) sqrt(27 k^2 + 332750) - 9 k)^(1/3))/6^(2/3)
Bring each solution to a common denominator and simplify:
Answer: x = (6^(1/3) (sqrt(81 k^2 + 998250) - 9 k)^(2/3) - 55 6^(2/3))/(6 (sqrt(81 k^2 + 998250) - 9 k)^(1/3)) or x = -((-1)^(1/3) ((sqrt(81 k^2 + 998250) - 9 k)^(2/3) + 55 (-6)^(1/3)))/(6^(2/3) (sqrt(81 k^2 + 998250) - 9 k)^(1/3)) or x = ((-1)^(1/3) ((-1)^(1/3) (sqrt(81 k^2 + 998250) - 9 k)^(2/3) + 55 6^(1/3)))/(6^(2/3) (sqrt(81 k^2 + 998250) - 9 k)^(1/3))
What is 24 x 1/6 as a fraction
The solution of the expression (24 x (1/6) is ( 4 / 1 ).
What is an expression?Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
The expression will be calculated as:-
E = 24 x 1/6
E = 24 / 6
E = 4 / 1
Hence, the solution of the given expression is ( 4 / 1).
To know more about expression follow
https://brainly.com/question/723406
#SPJ2
Please solve it quickly! thanks!
Answer:
2a - 8
General Formulas and Concepts:
Algebra I
Combining Like TermsStep-by-step explanation:
Step 1: Define
(a - 3) + (a - 5)
Step 2: Simplify
Combine like terms (a): 2a - 3 - 5Combine like terms (Z): 2a - 8answer this and ill give you brainliest
Meg conducted a survey of four school cafeterias to find the number of students who like sandwiches for lunch. The results of her survey are recorded in the table below:
School Cafeteria Survey
School Total Number of Students
in the Cafeteria Number of Students
Who Like Sandwiches
A 38 12
B 48 9
C 26 10
D 24 8
Which school has the greatest percentage of students who like sandwiches for lunch?
School A
School B
School C
School D
Answer:
B
Step-by-step explanation:
Hope this helped
Answer:
B Since it has the most and in the question it says which school has the greatest percent
Help PLZ I am failling math
Don’t mind this look at pic
Answer:
57%
Step-by-step explanation:
So since the total is 10730 we will do
100/10730 = 0.00931966449
then that times what the amount of uni students that currently receive aid
0.00931966449*6101 = 56.8592730662
round to the nearest percent
56.8592730662 ---> 57%
find two numbers a and b for which a+2b=100 and the product ab is maximized
1/3 + a =5/4
what does a equal
Answer:
the answer to this is a = 11/12
Step-by-step explanation:
I need help with this please
Answer:
1/3
Step-by-step explanation:
probability=4/12=1/3
hope this helps
please help meeee I need help
Answer:
Option 1
Step-by-step explanation:
Answer:
Option 2.
Step-by-step explanation:
The slope is negative, so it goes down from left to right.