Which expression is equivalent to (xy)z?
Answer:
C is the correct answer.
Step-by-step explanation:
Took the test.
x(yz)
Given: p(e) = 0.42, p(f) = 0.51, and p(e ∪ f) = 0.70 part
a.find p(e ∩ f). part
b.find p(e | f). part
c.find p(f | e). part
d.are the events e and f independent?
A square window has a perimeter of (8x+12) feet. Write an expression that represents the side length of the window (in feet). Please help!!!
The side length of the square window with a perimeter of (8x+12) feet is found by dividing the perimeter by 4, resulting in an expression for the side length as 2x + 3 feet.
Explanation:To find the side length of a square window with a given perimeter, you can use the fact that the perimeter (P) of a square is equal to four times the side length (s). In this case, the perimeter is expressed as (8x+12) feet. Since there are four sides of equal length in a square, you divide the perimeter by 4 to find the length of one side.
The formula for the perimeter of a square is:
P = 4s
Given the perimeter P = (8x+12), we can solve for the side length s by dividing both sides of the equation by 4:
s = (8x+12) ÷ 4
Simplifying the equation, we get:
s = 2x + 3
Therefore, the expression for the side length of the square window in feet is 2x + 3.
A blueprint for a picnic table has a scale of 1:20. The table in the blueprint is 3 in. long. What is the length of the actual picnic table?
A.) 5 feet
B.) 720 feet
C.) 5 inches
D.) 60 feet
Answer:
Option A is correct
5 feet is the length of the actual picnic table
Step-by-step explanation:
Proportion states that two ratios or fractions are equal.
As per the statement:
A blueprint for a picnic table has a scale of 1 : 20.
The table in the blueprint is 3 in. long.
Let x be the length of the actual picnic table.
By definition of proportion;
[tex]\frac{1}{20} = \frac{3}{x}[/tex]
By cross multiply we have;
[tex]x = 20 \cdot 3 = 60[/tex]
⇒x = 60 inches
Use conversion:
1 inches = [tex]\frac{1}{12}[/tex] feet
then;
60 inches = [tex]\frac{60}{12} = 5[/tex] feet
Therefore, the length of the actual picnic table is, 5 feet
Find the real square roots of .0064 and -.0081
In 1996, Town M had a population of 30,500 people, and it has grown at a rate of 2% every year. In 1996, Town N had 32,500 people and the population has increased by a contrast rate of 600 people each year. In what year were the populations of the two towns approximately equal?
What are the solutions of 12 – x2 = 0?
A. x = and x =
B. x = and x =
C. x = and x =
D. x = 6 and x = –6
The solution of the expression are,
⇒ x = 3.5 and x = - 3.5
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The expression is,
⇒ 12 - x² = 0
Now, We can simplify as;
⇒ 12 - x² = 0
⇒ 12 = x²
⇒ x = √12
⇒ x = ± 3.5
⇒ x = 3.5 and x = - 3.5
Thus, The solution of the expression are,
⇒ x = 3.5 and x = - 3.5
Learn more about the mathematical expression visit:
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If 2n is greater than 30 what can n be
If Lewis's house increases in value by 3% each year over two decades, he could still lose money when he sells the house if _____.
Select the best answer from the choices provided.
a) interest rates on mortgages fell 3% over the same time
b) his repair and maintenance costs were more than 3% a year
c) homes in other areas of town lost more than 3% of their value
d) his down payment was significantly more than 3% of the house value
The correct answer is:
b) his repair and maintenance costs were more than 3% a year
Explanation:
Lewis's house increases in value by 3% each year. However, if he spends more than 3% of the value of his home each year in repairs and maintenance, when he sells the home, he will not be making money; he will in fact lose money, compared to what he's spent the last two decades.
PLEASE HELP!!
A music store orders wooden drumsticks that weigh 96 grams per pair. The total weight of the box of drumsticks is 782 grams. How many pairs of drumsticks are in the box if the empty box weighs 206 grams?
_______ pairs?
Answer: 6 Drumsticks
Step-by-step explanation:
Find a particular solution to the nonhomogeneous differential equation y′′+6y′−7y=e4x
If cheese is $4.40 per kilogramme, what should I pay for 200 grammes?
Answer:
Cost of 200 gram chess = $0.88.
Step-by-step explanation:
Given : If cheese is $4.40 per kilogram.
To find : What should I pay for 200 gram.
Solution : We have given
1 kilogram = 1000 gram.
Cost of 1000 gram chess = $4.40.
Cost of 1 gram chess = [tex]\frac{4.40}{1000}[/tex].
Cost of 200 gram chess = [tex]\frac{4.40}{1000}* 200[/tex].
= $0.88.
Therefore, Cost of 200 gram chess = $0.88.
What happens if the correlation coefficient equals 0?
There is a strong negative linear relationship between x and y.
There is not a linear relationship between x and y.
There is a strong positive linear relationship between x and y.
There is a weak negative linear relationship between x and y.
The center of a circle is at the origin. An endpoint of a diameter of the circle is at (-3, -4). How long is the diameter of the circle? 5, 10, or 25?
Evaluate m+n2 if we know m= 2 and n =-2
How did early mathematicians define trigonometric functions?
Answer:
There are six trigonometric function, the first three are mainly used and other three are not use often, they are:
Sine (sin)Cosine (cos)Tangent (tan)Cosecant (cosec or csc)Secant (sec)Cotangent (cot)They are mainly the ratio of two side of triangle.i.e.
[tex]Sin x = \dfrac{Perpendicular}{Hypotenuse}[/tex]
[tex]Cos x = \dfrac{Base}{Hypotenuse}[/tex]
[tex]Tan x = \dfrac{Perpendicular}{Base}[/tex]
[tex]Cosec x = \dfrac{Hypotenuse}{Perpendicular}[/tex]
[tex]Sec x = \dfrac{Hypotenuse}{Base}[/tex]
[tex]Cot x = \dfrac{Base}{Perpendicular}[/tex]
On the basis of these ratios there are different relations defined in Trigonometry Chapter.
Answer:
length of chords
Explanation:
In the study of the earth and astronomy, mathematicians developed trigonometric functions as lengths of chords in a circle, not as ratios. The mathematician Ptolemy calculated chord lengths by inscribing regular polygons in a circle. Remarkably, he was able to calculate these lengths to an accuracy of about five decimal places. Ptolemy's table of chords is equivalent to our table of sine values. In this lesson, you will begin to see the relationship between the trigonometric functions and the circle.
A flying squirrel lives in a nest that is 15 feet high in a tree. To reach a fallen acorn that is 8 feet from the base of the tree, how far will the flying squirrel have to glide?
Final answer:
To find the distance the flying squirrel must glide to reach the acorn, the Pythagorean theorem is used. The tree's height (15 feet) and the horizontal distance to the acorn (8 feet) provide the two sides of a right triangle. The squirrel's glide distance is the hypotenuse, calculated to be 17 feet.
Explanation:
To calculate the distance the flying squirrel needs to glide to reach the acorn, we can apply the Pythagorean theorem. This theorem states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.
In this scenario, the tree height forms one side of a right triangle, the distance from the base of the tree to the acorn forms the second side, and the squirrel's glide path represents the hypotenuse.
Given:
Tree height (side a): 15 feet
Distance from the tree to the acorn (side b): 8 feet
Using the Pythagorean theorem:
c² = a² + b²
c² = 15² + 8²
c² = 225 + 64
c² = 289
c = √289
c = 17 feet
Therefore, the flying squirrel needs to glide 17 feet to reach the acorn.
Dakota makes a salad dressing by Combining 7 1/3 fluid ounces of oil and 2 1/8 fluid ounces of vinegar in a jar. she then pours 2 1/4 fluid ounces of the dressing on to her salad. How much dressing remains in the jar?
Miguel surveyed all the members of the junior high choir about their favorite class. The results from his survey are: Favorite Class Number of Students choir 19 math 7 history 5 English 9 science 4 Miguel concluded, from his results, that the favorite class among the entire student body would also be choir. Which is the best explanation of why his conclusion might not be true?
Answer:
He has surveyed the students who are already participating in the choir. So naturally the number of students who likes the choir class will be higher than in other classes. You can see it reflected in the data.
Step-by-step explanation:
He has surveyed the students who are already participating in the choir. So naturally the number of students who likes the choir class will be higher than in other classes. You can see it reflected in the data.
If he needs to make an inference on the whole school he needs to randomly pick people from the school and ask the same question. Then he can make a better inference about the favorite class of students.
Answer:
His sample group does not represent the entire school body.
Step-by-step explanation:
If the area of the parallelogram is 540 in^2 what is the missing height?
William has a 26-liter glass tank. First, he wants to put some marbles in it, all of the same volume. Then, he wants to fill the tank with some water until its comepletly full. If he uses 85 marbles, he will have to add 20.9 liters of water. What is the volume of each marble? and How much water is necessary if William uses 200 Marbles?
Answer:
Volume of each Marble: 0.06 liters
Water required for the marbles and water: 14 Liters
if gold is currently trading at 800.00 /oz and you inherit a gold coin worth 3200.00 how much does the coin weigh
caleb and his classmates are making felt dog toys for a local animal shelter. how much red and yellow felt does his teacher need to buy so 20 students can each make a toy?
felt needed for each toy
1/8 sheet of white
3/8 sheet of red
5/8 sheet of yellow
1 1/8 sheets of black
Answer:
C ) 8 sheets of red and 13 sheets of yellow felt
Step-by-step explanation:
Final answer:
Caleb's teacher needs to purchase 7.5 sheets of red felt and 12.5 sheets of yellow felt so that each of the 20 students can make a dog toy.
Explanation:
To calculate the amount of red and yellow felt Caleb's teacher needs to buy for 20 students to each make a dog toy, we can multiply the amount of felt needed for one toy by the total number of students.
Red felt needed: 3/8 sheet per toy
Yellow felt needed: 5/8 sheet per toy
For red felt:
3/8 sheet x 20 students = 60/8 sheets
To simplify this, we divide 60 by 8, which equals 7.5 sheets. So, the teacher needs to buy 7.5 sheets of red felt.
For yellow felt:
5/8 sheet x 20 students = 100/8 sheets
After simplifying, 100 divided by 8 equals 12.5 sheets. Therefore, the teacher needs to acquire 12.5 sheets of yellow felt.
Calculate the integral s f · ds, where s is the entire surface of the solid half ball x2 + y2 + z2 ≤ 1, z ≥ 0, and f = (x + 3y5)i + ( y + 10xz)j + (z − xy)k. (let s be oriented by the outward-pointing normal.)
Final answer:
To find the integral of the vector field over the solid half ball, we calculate two surface integrals, one over the flat disk and one over the hemisphere's curved surface, and then sum their contributions.
Explanation:
The student has asked to calculate the surface integral of the vector field f = (x + 3y^5)i + ( y + 10xz)j + (z - xy)k over the upper half of the sphere [tex]x^2 + y^2 + z^2 = 1[/tex], with z ≥ 0. To solve this, we can use the divergence theorem, noting that the divergence of f is ∇ · f, and then integrating that over the volume of the half sphere. We divide the surface S into two parts: the flat circular disk at the bottom (where z = 0) and the curved surface of the half sphere. The flux through the curved surface can be found by integrating over the sphere's surface, while the disk contributes a separate integral. This requires calculating two different surface integrals, and adding their results.
The surface integral [tex]\(\int_{S} \mathbf{f} \cdot d\mathbf{s}\)[/tex] for the given vector field and half-ball surface is [tex]\(2\pi\)[/tex].
To calculate the surface integral [tex]\(\int_{S} \mathbf{f} \cdot d\mathbf{s}\)[/tex] where [tex]\(S\)[/tex] is the entire surface of the solid half-ball [tex]\(x^2 + y^2 + z^2 \leq 1, z \geq 0\) and \(\mathbf{f} = (x + 3y^5)\mathbf{i} + (y + 10xz)\mathbf{j} + (z - xy)\mathbf{k}\)[/tex], we will use the Divergence Theorem.
The Divergence Theorem states that for a vector field [tex]\(\mathbf{f}\)[/tex],
[tex]\[\int_{S} \mathbf{f} \cdot d\mathbf{s} = \int_{V} (\nabla \cdot \mathbf{f}) \, dV\][/tex]
where [tex]\(S\)[/tex] is the boundary surface of the volume [tex]\(V\),[/tex] oriented by the outward-pointing normal.
1. Calculate the Divergence [tex]\(\nabla \cdot \mathbf{f}\)[/tex]:
[tex]\[\nabla \cdot \mathbf{f} = \frac{\partial}{\partial x}(x + 3y^5) + \frac{\partial}{\partial y}(y + 10xz) + \frac{\partial}{\partial z}(z - xy)\][/tex]
Computing each term:
[tex]\[\frac{\partial}{\partial x}(x + 3y^5) = 1\][/tex]
[tex]\[\frac{\partial}{\partial y}(y + 10xz) = 1\][/tex]
[tex]\[\frac{\partial}{\partial z}(z - xy) = 1\][/tex]
So the divergence is:
[tex]\[\nabla \cdot \mathbf{f} = 1 + 1 + 1 = 3\][/tex]
2. Set up the volume integral:
The volume (V) is the solid half-ball defined by [tex]\(x^2 + y^2 + z^2 \leq 1\)[/tex] and [tex]\(z \geq 0\)[/tex].
We will integrate the constant divergence \(3\) over the volume of the half-ball. The volume of a full ball of radius 1 is \(\frac{4}{3} \pi (1^3) = \frac{4}{3} \pi\). Since we have a half-ball, the volume is:
[tex]\[\text{Volume of half-ball} = \frac{1}{2} \cdot \frac{4}{3} \pi = \frac{2}{3} \pi\][/tex]
3. Evaluate the volume integral:
[tex]\[\int_{V} (\nabla \cdot \mathbf{f}) \, dV = \int_{V} 3 \, dV = 3 \int_{V} dV = 3 \cdot \text{Volume of half-ball} = 3 \cdot \frac{2}{3} \pi = 2 \pi\][/tex]
Therefore, the surface integral is:
[tex]\[\int_{S} \mathbf{f} \cdot d\mathbf{s} = 2\pi\][/tex]
So, the final answer is:
[tex]\[\boxed{2\pi}\][/tex]
is x/5 = y/3 a linear function
Jamel swam 92 meters in 4 minutes. Andre swam 105 meters in 5 minutes. Who is ther faster swimmer? Provide very clear evidence to support your answer.
Complete the equation of the graphed linear function in point-slope form.
y – 6 =
(x –
)
The graph of the function goes through point negative 6, 6 and point negative 8, 2.
The y-value increases by 4 when the x-value increases by 2, so the slope is
... 4/2 = 2
Your equation for the line with slope m through point (h, k) is
... y - k = m(x - h)
and you have m = 2, (h, k) = (-6, 6)
Filling in those values gives
... y - 6 = 2(x - (-6))
Tim Worker estimates his taxable income will be $7,000. He is paid twice a month or 24 times a year. Because Tim has only one source of income, he uses the Tax Tables to estimate how much will be deducted from his pay for withholding.
Answer: finds the tax rate for his income level: 10%
Enters the base amount 29.16
Enters the amount of tax owed: 700
Divides by: 10 =:700
Step-by-step explanation:
I took the test hope this helps
a parallelogram with congruent diagonals is a _____.
in how may ways could mushrooms or olives be included in his toppings?