How much will you pay the cashier for a candy bar that originally costs 79 cents and is now marked 15% off? Sales tax is 5.5%
which of these is the absolute value parent function?
A. f(x) = |x| – 2
B. f(x) = |x|
C. f(x) = |2x|
D. f(x) = |x| + 1
Answer:
The correct option is B. The absolute value parent function is f(x) = |x|.
Step-by-step explanation:
The absolute parent function is a function where
[tex]f(x)=x[/tex] and [tex]f(-x)=x[/tex]
The graph of absolute function is v-shaped and vertex of the function is (0,0).
According to these conditions the absolute value parent function is
f(x) = |x|
The function f(x) = |x| – 2 shifts 2 units down.
The function f(x) = |2x| stretch by factor 2.
The function f(x) = |x| + 1 shifts 1 units up.
Therefore the correct option is B.
3x+y=5
y=2x
Substitution method
Find dy/dx by implicit differentiation. 3x + y = 8 + x2y2
To find dy/dx by implicit differentiation, differentiate both sides of the equation with respect to x, apply the chain rule and product rule, isolate the terms involving dy, and simplify the equation to find dy/dx.
Explanation:To find dy/dx by implicit differentiation, we need to differentiate both sides of the equation with respect to x. Using the chain rule and product rule, we can simplify the equation and solve for dy/dx. Starting with 3x + y = 8 + x^2y^2:
Step 1: Differentiate each term with respect to x.
Step 2: Apply the chain rule and product rule to simplify the equation.
Step 3: Solve for dy/dx by isolating the terms involving dy.
Step 4: Simplify the equation and rearrange to get dy/dx.
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Jessica purchased an $84 suit. The sales tax is 6.5%. What is the total price of the suit including tax?
What is the equation of the line that passes through
(10, 4)
and is perpendicular to
5x−y=3
T Shirt sore keeps 7 white T-Shirts on the shelves for every 3 purple T- Shirts on the shelve how many white T-Shirts on the shelve if 15 purple T-Shirts on the shelve. Show how you get the answer in long form
The table below shows the results of a survey in which 141141 men and 145145 women workers ages 25 to 64 were asked if they have at least one month's income set aside for emergencies. complete parts (a) through (d). men women total less than one month's income 6565 8484 149149 one month's income or more 7676 6161 137137 total 141141 145145 286286 (a) find the probability that a randomly selected worker has one month's income or more set aside for emergencies. the probability is nothing. (round to the nearest thousandth as needed.) (b) given that a randomly selected worker is a male, find the probability that the worker has less than one month's income. the probability is nothing. (round to the nearest thousandth as needed.) (c) given that a randomly selected worker has one month's income or more, find the probability that the worker is a female. the probability is nothing. (round to the nearest thousandth as needed.) (d) are the events "having less than one month's income saved" and "being male" independent or dependent? independent dependent
Final answer:
The probability that a randomly selected worker has one month's income or more set aside for emergencies is approximately 0.479. Given that a randomly selected worker is a male, the probability that the worker has less than one month's income is approximately 0.460. Given that a randomly selected worker has one month's income or more set aside for emergencies, the probability that the worker is a female is approximately 0.446. The events 'having less than one month's income saved' and 'being male' are independent.
Explanation:
To find the probability that a randomly selected worker has one month's income or more set aside for emergencies, we need to divide the number of workers with one month's income or more by the total number of workers. According to the table, there are 76 men and 61 women with one month's income or more, for a total of 137 workers. The total number of workers is 286. So the probability is 137/286, which is approximately 0.479.
Given that a randomly selected worker is a male, we need to find the probability that the worker has less than one month's income set aside for emergencies. According to the table, there are 65 men with less than one month's income. The total number of men is 141. So the probability is 65/141, which is approximately 0.460.
Given that a randomly selected worker has one month's income or more set aside for emergencies, we need to find the probability that the worker is a female. According to the table, there are 61 women with one month's income or more. The total number of workers with one month's income or more is 137. So the probability is 61/137, which is approximately 0.446.
The events 'having less than one month's income saved' and 'being male' are independent. To confirm independence, we need to check if the probability of both events occurring is equal to the product of their individual probabilities. In this case, the probability of having less than one month's income saved is 65/286 and the probability of being male is 141/286. The probability of both events occurring is (65/286) * (141/286), which is approximately 0.126. This is equal to the product of their individual probabilities, confirming that the events are independent.
Write the expression as the sine, cosine, or tangent of an angle. cos 8x cos 2x - sin 8x sin 2x
Answer:
cos (A - B) = cos 6 x
Step-by-step explanation:
given equation,
= cos 8 x . cos 2 x - sin 8 x . sin 2 x
using identity
cos (A - B) = cos (A) . cos(B) - sin (A) . sin(B)...................(1)
cos 8 x . cos 2 x - sin 8 x . sin 2 x......................................(2)
comparing both the equation (1) and (2)
we get ,
A = 8 x B = 2 x
hence, from the above identity we can see that
cos (A - B) = cos (8 x - 2 x)
cos (A - B) = cos 6 x
Find each percentage decrease. round to the nearest percentage from 16 bagels to 0 bagels
To solve this problem:
The formula would be: New Value – Old Value)/Old Value] x 100 or in the form of variable it would be: [(B-A)/A] x 100 = Answer.
So plugging in the information given in our problem it would be:
0 – 16 / 16 x 100 = percent of change
0/16 x 100 = 0%
The answer is 0%
What is the relationship between 0.04 and 0.004?
Find the minimum and maximum of f(x,y,z)=x^2+y^2+z^2 subject to two constraints, x+2y+z=4 and x-y=8.
Samir works 15 hours for every 19 hours that Mitul works. If x represents the number of hours that Mitul works and y represents the hours that Samir works, which equation correctly models this relationship?
Answer:
[tex]y=\frac{15}{19}x[/tex]
Step-by-step explanation:
Let
x-----> the number of hours that Mitul works
y-----> the hours that Samir works
by proportion
[tex]\frac{x}{y}=\frac{19}{15}\\ \\19y=15x\\ \\y=\frac{15}{19}x[/tex]
Michael started a savings account with $300. After 4 weeks, he had $350 dollars, and after 9 weeks, he had $400. What is the rate of change of money in his savings account per week?
order the set of numbers from least to greatest
11/20, 1/2, 0.51
a. 0.51, 11/20, 1/2
b. 1/2, 0.51/, 11/20
c. 1/2, 11/20, 0.51
d. 0.51, 1/2, 11/20
Answer: Option 'b' is correct.
Step-by-step explanation:
Since we have given that
[tex]\frac{11}{20},\frac{1}{2},0.51[/tex]
Now, we have to arrange the set of numbers from least to greatest.
So, for this we have to make the denominator same ,
[tex]\frac{11\times 5}{20\times 5}=\frac{55}{100}[/tex]
Similarly,
[tex]\frac{1\times 50}{2\times 50}=\frac{50}{100}[/tex]
Similarly,
[tex]\frac{51}{100}[/tex]
Numbers In increasing order :
[tex]\frac{50}{100},\frac{51}{100},\frac{55}{100}\\\\\frac{1}{2},0.51,\frac{11}{20}[/tex]
Hence, Option 'b' is correct.
Evaluate. 4⋅(4+(2^6⋅2^−3))
The ruby- throated hummingbird has a wing beat of about 200 beats per second. About how many wings beats would a huming bird have in 3 minutes
Which are properties of rotations? Check all that apply.
1 Rotations are always counterclockwise.
2 Rotations preserve size.
3 Rotations of 360° map a figure to itself.
4 Lines connecting corresponding points on the pre-image and image are parallel.
5 Lines connecting corresponding points on the pre-image and image have equal length.
6 Lines connecting the center of rotation to the pre-image and the corresponding point on the image have equal length.
Answer:- The correct properties of rotation are as follows:-
2.Rotations preserve size.
3. Rotations of 360° map a figure to itself.
6. Lines connecting the center of rotation to the pre-image and the corresponding point on the image have equal length.
Explanation:-
Rotation transformation is a rigid transformation which create the image of a figure with same shape and size by rotating it by some degrees about the the center of rotation.1. False ; Rotations are always counterclockwise.→ it is not a property of rotation, ∵rotation can be clockwise or counterclockwise both.
2.True; Rotations preserve size. [by definition of rotation]
3.True; Rotations of 360° map a figure to itself. [It completes one turn and get back to the original position ]
4.False; Lines connecting corresponding points on the pre-image and image are parallel. [They can be intersect]
5.False ; Lines connecting corresponding points on the pre-image and image have equal length.[The point which is the center of rotation in a figure is nearest to its image rather than the other points. ]
6. True ; Lines connecting the center of rotation to the pre-image and the corresponding point on the image have equal length. [∵ all the points of the figure is rotated about the center of the point ,so the distance of the center of rotation to the pre-image and the corresponding point on the image have equal length]
Rotations have several properties, including preserving size, mapping a figure to itself when rotated by 360°, and having lines connecting the centre of rotation to the pre-image and image equal in length.
Properties of rotations:
Rotations are not always counterclockwise.Rotations preserve size.Rotations of 360° map a figure to itself.Lines connecting corresponding points on the pre-image and image are parallel.Lines connecting corresponding points on the preimage and image have equal lengths.Lines connecting the centre of rotation to the pre-image and the corresponding point on the image have equal lengths.A bathtub is draining at a constant rate. After 2 minutes, it holds 30 gallons of water. Three minutes later, it holds 12 gallons of water. Write an equation that represents the number y of gallons of water in the tub after x minutes.
3 minutes - 2 minutes = 1 minute
30 gallons - 12 gallons = 18 gallons
it is draining at 18 gallons per minute
equation would be: y = -18x
how much should Tabatha budget monthly for insurance that costs $956.89 for the entire year?
You have 900-grams of an an unknown radioactive substance that has been determined to decay according to D ( t ) = 900 e − 0.002415 ⋅ t D ( t ) = 900 e - 0.002415 ⋅ t where t t is in years. How long before half of the initial amount has decayed?
It will take __ years for half of the initial amount to decay. (Round to 1 decimal place)
Find the instantaneous rate of change of w with respect to z if w=7/3z^2
The instantaneous rate of change of 'w' with respect to 'z', for the function w = 7/3z², is 14/3*z.
Explanation:The question is asking for the instantaneous rate of change of 'w' with respect to 'z'. To compute this, we need to take the derivative of w with respect to z, for the given function w = 7/3z². Using the power rule, which says that the derivative of z^n is n*z^(n-1), our derivative would be: (7/3)*2*z^(2-1) simplifying this gives 14/3*z. Hence, the instantaneous rate of change of 'w' with respect to 'z' for given function is 14/3*z.
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G use lagrange multipliers to find the volume of the largest rectangular box in the first octant with three faces in the coordinate planes and one vertex in the given plane.x + 9y + 8z = 27
Is this equation correct? 18/48=27/72?
How much force is required to push a 54-pound sofa across a carpeted floor?
Manuel and Sonja are shopping for school supplies. Manuel is buying 5 notebooks and 3 pens at a cost of $21. Sonja is buying 6 notebooks and 5 pens at a cost of $28. The first equation, representing Manuel’s purchase, is mc015-1.jpg. What is the second equation needed to solve the system?
Answer:
Second equation is 6x + 5y = 28
Step-by-step explanation:
Let x is the cost of notebooks and y is the cost of pens.
Now we know Manuel is buying 5 notebooks and 3 pens at a cost of $21.
To represent this statement equation is 5x + 3y = 21
Similarly we will form the second equation to solve the system of equations.
Cost of 6 notebooks = 6x
Cost of 5 pens = 5y
Total cost of 6 notebooks and 5 pens = $28
So 6x + 5y = 28 will be the second equation.
By solving this system of equations we can find the cost of notebook as well as cost of pen purchased by Manuel.
Kelly read 30 pages of her 300 page book on 6 hours at this rate how long will it take her to read the entire book
a plumber charges a base fee of $55 for a service call plus $35 per hour for each hour worked during the service call the relationship between the total price of the service called and the number of hours worked
The relationship between the total price and the number of hours worked can be represented by a linear equation. The equation is y = 35x + 55, where y represents the total price and x represents the number of hours worked.
Explanation:The relationship between the total price of the service call and the number of hours worked can be represented by a linear equation. We can use the formula y = mx + b, where y represents the total price, x represents the number of hours worked, m represents the hourly fee, and b represents the base fee.
In this case, the plumber charges a base fee of $55 and $35 per hour. So the equation that expresses the total price is y = 35x + 55.
The independent variable in this situation is the number of hours worked, which is x. The dependent variable is the total price, which is y. The y-intercept of the equation is 55, which represents the base fee. The slope of the equation is 35, which represents the hourly fee. The y-intercept (b) is the point where the line intersects the y-axis, and the slope (m) determines how steep the line is.
A restaurant requires customers to pay a 15% tip for the server. your family spends $45 on the meal.
a.how much money do you need to pay the server?
b.how much money will you spend total?
A) 45 * 0.15 = $6.75 paid to server
B 45 + 6.75 = $51.75 total
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