Therefore , expression problem solution is during the run, the adults covered a distance of 24 metres, and it took them 8 seconds to catch up to the children.
Explain expression.There is a need for mathematical operations like multiplying, splitting, combining, and now even deleting. If they were combined, it would be said that: A mathematical formula, some data, and an equation A declaration of truth is composed of values, elements, and mathematical operations like additions, subtractions, missteps, algebraic formulas, and divisions. It is possible to evaluate and analyse words and phrases.
Here,
Distance is determined by rate and duration.
for the distances that children and adults travel, two equations should be made up:
=> (d - 16) = 1t (for the youngsters) (for the kids)
=> d = 3t (for the males) (for the adults)
where "t" represents the amount of time that has elapsed since the competition began.
We can set the distances between the children and adults to be equal because we know that they were side-by-side at some time during the race:
=> d - 16 = 3t - 16
When we simplify this solution, we obtain:
=> d = 3t
When we add this to the prior solution, we obtain:
=> 3t - 16 = 1t
To solve for "t," we obtain:
=> t = 8 sec.
Now that we know how far the grownups travelled:
D=3t=3x8=24 metres.
As a result, during the run, the adults covered a distance of 24 metres, and it took them 8 seconds to catch up to the children.
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10. The second term of an arithmetic sequence is az = 24. The common difference
is d = -3. Find the first term of the sequence.
The first term of the arithmetic sequence is 27.
What is Arithmetic Sequence?Arithmetic sequence is a sequence of numbers where the numbers are arranged ion a definite order such that the difference of two consecutive numbers is a constant. This constant of difference is called common difference which is commonly denoted by the letter 'd'.
Given that,
Second term of arithmetic sequence, a₂ = 24
Common difference, d = -3
Now, common difference is the difference of the two consecutive terms.
a₂ - a₁ = d
24 - a₁ = -3
-a₁ = -3 - 24
-a₁ = -27
a₁ = 27
Hence the first term is 27 for the sequence.
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Present a quadratic equation in the form ax2 + bx + c = 0 where a > 1.
*use a quadratic equation with a greater than one. like 2x squared - 2x - 7
How many solutions does your quadratic have based on the discriminant?
Pick TWO ways to find the specific solutions or show that there is no solution:
Quadratic Formula
Graphing
Factoring
Square Root Property
Completing the Square
Why did you choose those two specific methods versus the others?
I chose the Quadratic Formula and Factoring to solve the quadratic equation 2x squared - 2x - 7 = 0 because they are the two most commonly used methods when solving a quadratic equation.
The Quadratic Formula is an algebraic formula used to solve a quadratic equation, and it is a very useful tool in determining the solutions of a quadratic equation quickly. It is particularly helpful when the quadratic equation has a more complicated form.
Factoring is also a very useful tool when solving a quadratic equation. It involves breaking the equation down into its component parts, and then solving the equation by finding the factors of the equation that add up to zero.
This method is especially helpful in cases where the equation cannot be easily solved using the Quadratic Formula. Both of these methods are very useful in solving a quadratic equation, and I chose them as the two methods to use in this particular example.
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Given z_(1) and z_(2), find the distance between them. z_(1)=3+7i and z_(2)=-5-2i
To find the distance between two complex numbers, we use the formula:
|z2 - z1| = sqrt((Re(z2) - Re(z1))^2 + (Im(z2) - Im(z1))^2)
where Re(z) is the real part of z and Im(z) is the imaginary part of z.
Using this formula, we can find the distance between z1 = 3+7i and z2 = -5-2i as follows:
Re(z1) = 3, Im(z1) = 7
Re(z2) = -5, Im(z2) = -2
|z2 - z1| = sqrt((-5 - 3)^2 + (-2 - 7)^2)
= sqrt((-8)^2 + (-9)^2)
= sqrt(64 + 81)
= sqrt(145)
Therefore, the distance between z1 = 3+7i and z2 = -5-2i is sqrt(145).
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TASK 4 Differential equations
One of the solutions to the equation
y (x) + p(x) y (x) + q (x) y(x) = 0
is given by41
9 (z) = sinh(27)
x
=moreover, the wronskian of two independent solutions is always constant. Find another solution to the equation that is independent fromyı (x) for x > 0.
The another independent solution y2(x) can be found by multiplying y1(x) with the obtained [tex]v(x): y2(x) = y1(x)v(x) = sinh(27x)v(x).[/tex]
To find another independent solution to the given differential equation, [tex]y(x) + p(x)y'(x) + q(x)y(x) = 0[/tex], with one solution [tex]y1(x) = sinh(27x)[/tex], we can use the formula for finding a second linearly independent solution using the Wronskian.
The Wronskian of two independent solutions is given by [tex]W(y1, y2) = y1(x)y2'(x) - y1'(x)y2(x)[/tex]. Since [tex]W(y1, y2)[/tex] is a constant, we can define W as a constant value, let's say c.
Introduce a new function v(x) such that [tex]y2(x) = y1(x)v(x), so y2(x) = sinh(27x)v(x).[/tex] Compute the derivative of y2(x): [tex]y2'(x) = 27cosh(27x)v(x) + sinh(27x)v'(x)[/tex]. Substitute [tex]y1(x), y1'(x), y2(x), and y2'(x)[/tex]into the Wronskian equation: c = [tex]sinh(27x)[27cosh(27x)v(x) + sinh(27x)v'(x)] - 27cosh(27x)sinh(27x)v(x)[/tex]
Divide by [tex]sin(27x)cos(27x)[/tex] to simplify the equation: c / [tex](27sinh(27x)cosh(27x)) = v(x) + (1/27)v'(x).[/tex] Rearrange the equation to obtain a first-order linear differential equation: [tex]v'(x) - 27v(x) = 27c / sinh(27x)cosh(27x)[/tex]
Solve the differential equation for[tex]v(x)[/tex] (you can use an integrating factor or another method). Finally, the second independent solution [tex]y2(x)[/tex] can be found by multiplying [tex]y1(x)[/tex]with the obtained [tex]v(x): y2(x) = y1(x)v(x) = sinh(27x)v(x).[/tex]
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By completing the square, the expression x^(2)+10x+140 equals (x+A)^(2)+B where A= and B
By completing the square, the expression x²+10x+140 can be rewritten in the form (x+A)²+B. Where A=5 and B=-115.
To do this, we need to find the values of A and B.
Start with the original expression: x²+10x+140
Move the constant term to the right side of the equation: x²+10x = -140
Take half of the coefficient of the x term and square it: (10/2)²= 25
Add this value to both sides of the equation: x²+10x+25 = -140+25
Simplify the right side of the equation: x²+10x+25 = -115
Factor the left side of the equation: (x+5)² = -115
Therefore, the expression x²+10x+140 can be rewritten as (x+5)²-115, where A=5 and B=-115.
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PLEASE HELP!!!
Find the missing part.
Check the picture below.
Use the properties of exponents to write the expression without negative exponents.
The equivalent of the expression is w⁴z⁵/s⁶r⁵
How to determine the equivalent expressionFrom the question, we have the following parameters that can be used in our computation:
s⁻⁶r⁻⁵w⁵z⁵w⁻⁹
Evaluate the like factors using the law of indices
So, we have the following representation
s⁻⁶r⁻⁵w⁴z⁵
Rewrite the expression without negative exponents.
So, we have
w⁴z⁵/s⁶r⁵
hence, the expression is w⁴z⁵/s⁶r⁵
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Ft of his candy bar with his 2 friends, so that all three of them get equal portions. What fraction of the candy bar will each kid get? Choose the model that represents the answer. Rectangle divided into six pieces with one shaded. Rectangle divided into three pieces with one shaded. Rectangle divided into nine pieces with one shaded. Rectangle divided into nine pieces with three shaded
The model that represents the answer is a rectangle divided into three pieces with one shaded, which indicates that each friend will receive 1/3 of the candy bar.
What is rectangle?
A rectangle is a four-sided flat shape that has four right angles, where opposite sides are parallel and congruent (i.e., of equal length).
The model that represents the answer to the given problem is a rectangle divided into three pieces with one shaded.
Each friend will receive an equal portion of the candy bar, so the candy bar needs to be divided into three equal parts.
Each part represents the fraction of the candy bar that each kid will receive.
Therefore, the model that represents the answer is a rectangle divided into three pieces with one shaded, which indicates that each friend will receive 1/3 of the candy bar.
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On a bicycle, Lomasi rides for 10 hours and is 22 miles from her house. After riding for 12 hours, she is 26 miles away. What is Lomasi's rate?
Lomasi's rate is 2 miles per hour. She traveled 4 miles in 2 hours, so her rate is 2 miles per hour.
To find Lomasi's current rate, we can subtract the distance she has traveled so far (22 miles) from the total distance (26 miles) to get the distance she traveled in the last 2 hours, which is 4 miles.
Then, we can divide the distance she traveled in the last 2 hours (12 - 10) by the time taken (2 hours) to get her current rate, which is 2 miles per hour.
Therefore, Lomasi's current rate is 2 miles per hour.
Take note that this question is simply ask for Lomasi's current rate, not an average rate.
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I NEED helppppppppppppppp
tell me if you still have questions
Question 2 of 6 View Policies Current Attempt in Progress Express the following as a linear combination of u =(3, 1,6), v = (1.-1.4) and w=(8,3,8). (14, 9, 14) = ____ u- _____ v+ _____
Answer: The given vector can be expressed as a linear combination of u, v, and w as (14, 9, 14) = u - v + 3w.
Question: Express the following as a linear combination of u =(3, 1,6), v = (1.-1.4) and w=(8,3,8). (14, 9, 14) = ____ u- _____ v+ _____
Current Progress: To express the given vector as a linear combination of u, v, and w, we need to find scalars a, b, and c such that (14, 9, 14) = a*u + b*v + c*w.
Step 1: Write the equation in component form:
(14, 9, 14) = (3a + b + 8c, a - b + 3c, 6a + 4b + 8c)
Step 2: Equate the corresponding components and solve for a, b, and c:
3a + b + 8c = 14
a - b + 3c = 9
6a + 4b + 8c = 14
Step 3: Solve the system of equations using any method (substitution, elimination, etc.). One possible solution is a = 1, b = -1, and c = 3.
Step 4: Plug the values of a, b, and c back into the linear combination equation:
(14, 9, 14) = 1*u + (-1)*v + 3*w
Step 5: Simplify the equation:
(14, 9, 14) = u - v + 3w
Answer: The given vector can be expressed as a linear combination of u, v, and w as (14, 9, 14) = u - v + 3w.
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what is the percent change from 40 to 51?
Answer:
27.5%
Step-by-step explanation:
Given: the percent increase from 40 to 51
Percent change = 51 - 40 |40| × 100% = 11 40 × 100 = 27.5% (increase).
Where: 40 is the old value and 51 is the new value. In this case we have a positive change (increase) of 27.5 percent because the new value is greater than the old value.
Answer:
27.5%
Step-by-step explanation:
To calculate the percent change from 40 to 51, we can use the following formula:
Percent Change = (New Value - Old Value) / Old Value x 100%
In this case, the old value is 40, and the new value is 51.
So, plugging these values into the formula, we get:
Percent Change = (51 - 40) / 40 x 100%
Percent Change = 11 / 40 x 100%
Percent Change = 0.275 x 100%
Percent Change = 27.5%
Therefore, the percent change from 40 to 51 is 27.5%.
Prove that for a real auto correlation matrix R all the eigen values are must be real and eigen vector corresponding to distinct eigenvalues of R are mutually orthogonal.
We can conclude that xᵀy = 0, which means that the eigenvectors x and y are mutually orthogonal. We have proved that for a real auto correlation matrix R, all the eigenvalues are real and eigenvectors corresponding to distinct eigenvalues are mutually orthogonal.
For a real auto correlation matrix R all the eigen values are must be real and eigen vector corresponding to distinct eigenvalues of R are mutually orthogonal.Explanation:Let R be the real auto correlation matrix and λ be the eigenvalues of R. Since R is a real matrix, we know that λ must also be real. Now, let x and y be the eigenvectors corresponding to distinct eigenvalues λ1 and λ2 of R. We can write the following equations:Rx = λ1xRy = λ2yTaking the transpose of the first equation and multiplying both sides by y, we get:xᵀRᵀy = λ1xᵀySince R is a real auto correlation matrix, we know that Rᵀ = R. Therefore, we can rewrite the equation as:xᵀRy = λ1xᵀySubstituting Ry = λ2y into the equation, we get:xᵀ(λ2y) = λ1xᵀySimplifying and rearranging the terms, we get:(λ1 - λ2)xᵀy = 0Since λ1 and λ2 are distinct eigenvalues, we know that λ1 - λ2 ≠ 0. Therefore, we can conclude that xᵀy = 0, which means that the eigenvectors x and y are mutually orthogonal. Thus, we have proved that for a real auto correlation matrix R, all the eigenvalues are real and eigenvectors corresponding to distinct eigenvalues are mutually orthogonal.
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Isla’s university English teacher Mr. McTuffie has told her she will have 27 assignments this semester. Isla has discovered that she needs to spend 2.5 hours on each assignment. She has a 5 hour limit per day
How many hours will Isla spend on her English assignments?
How many days will Isla take to complete her assignments?
How many weeks will it take Isla to complete her assignments
PLEASE HELP
The number of weeks it will take Isla to complete her assignments is 2.
What is the unitary method?The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value. Unitary method is a technique by which we find the value of a single unit from the value of multiple devices and the value of more than one unit from the value of a single unit. It is a method that we use for most of the calculations in math.
We are given that;
Number of assignments=27
Time needed by isla=2.5 hrs
hour limit per day=5
Now,
To find out how many hours Isla will spend on her English assignments, we can multiply the number of assignments by the time it takes her to complete each assignment:
27 assignments * 2.5 hours per assignment = 67.5 hours
So Isla will spend a total of 67.5 hours on her English assignments.
To find out how many days it will take Isla to complete her assignments, we need to divide the total number of hours by the number of hours she can work per day:
67.5 hours / 5 hours per day = 13.5 days
Since Isla cannot complete a fraction of a day, she will need to round up to 14 days. So it will take Isla 14 days to complete her assignments.
To find out how many weeks it will take Isla to complete her assignments, we need to divide the total number of days by the number of days per week. Assuming a standard 7-day week, we have:
14 days / 7 days per week = 2 weeks
Therefore, by unitary method the answer will be 2 weeks.
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The relationship between the postage rate and the weight of a letter can be defined by a piecewise function.
The graph shows the 2018 postage rates for using regular service to mail a letter.
Kiran and Mai wrote some rules to represent the postage function, but each of them made some errors.
The initial symbol in the Kiran equation is erroneous, and there are two rates for weights of 1, 2, and 3 ounces. In contrast, the prices for 1, 2, and 3 ounces are incorrectly expressed in the Mai equation.
What do you mean by contract rate?A contract rate, also known as the coupon rate, stated rate, or nominal rate, is the interest rate that is stipulated in a certain contract.
What went wrong for Kiran?
1. For 1, 2, and 3 ounces, there are two rates: Kiran used the wrong symbols to describe the rates for 1, 2, and 3 ounces. Let's look at an illustration:
0.71 1 ≤ w ≤ 2
0.92 2 ≤ w ≤ 3
Because in the first line the rate is 0.71 for weights less than or equal to 2, and because this also occurs in the second line, it appears that the rate for 2 pounds here can be both 0.71 and 0.92.
2. He chose the wrong initial symbol since it implies that there is a charge even when the weight is 0, which is not conceivable.
0.50 0 ≤ w ≤ 1 (The rate is 0.50 if the weight is less than or equal to 0)
What is Mai's error?
1. Similar to Kiran, she did not express the rate and the pounds. Let's consider one instance:
0.71 1 < w < 2 (The rate is 0.71 if the weight is less than 2; this is false because the rate is 0.71 if the weight is less than or equal to 2)
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A clinical psychologist examined the substance abuse scores of a random sample of clients diagnosed with substance use disorder from a large district. The scores were derived from a well validated and reliable substance abuse questionnaire, on a scale from 0 (no substance abuse) to a highest abuse level (on the scale) of 70. A higher substance abuse score indicates a higher level of substance usage. Each participant was measured using the questionnaire at two points of time: before and after completing an intervention intended for reducing substance abuse behaviours. This intervention lasted three months and had not been previously implemented in the district. Parts of the analysis output conducted by the psychologist are shown below:
a. State the null and alternative hypotheses of this test.
b. Report the statistical conclusion of this test with respect to the research question and cite the statistical values as the basis of your conclusion (as if you are reporting the results in a psychology research paper).
a. The null hypothesis for this test is that the intervention has no effect on substance abuse scores and that there is no difference between the scores before and after the intervention. The alternative hypothesis is that the intervention has an effect on substance abuse scores and that there is a statistically significant difference between the scores before and after the intervention.
b. The statistical conclusion of this test is that the intervention had a significant effect on substance abuse scores, with a t-test of -5.918 and a p-value of <0.001. This suggests that there is a statistically significant difference between the scores before and after the intervention.
a. The null hypothesis of this test is that there is no difference in substance abuse scores before and after completing the intervention, or H0: μ1 = μ2. The alternative hypothesis is that there is a difference in substance abuse scores before and after completing the intervention, or Ha: μ1 ≠ μ2.
b. The statistical conclusion of this test is that there is a statistically significant difference in substance abuse scores before and after completing the intervention, t(19) = 4.38, p < 0.001. This means that the intervention was effective in reducing substance abuse behaviors among the clients in the sample. The statistical values that support this conclusion are the t-value of 4.38 and the p-value of less than 0.001, which indicate that the difference in substance abuse scores before and after the intervention is not due to chance.
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1. Mr. Bryan’s pet turtle walks 280 feet at a speed of 4ft/min. How long does his walk take?
2. Adrian’s mom drove 3 hours to get to San Antonio at a speed of 65 miles per hour. How far away is San Antonio?
Answer:
1. 1hour 10minutes = 70 minutes
2. 190 miles
Step-by-step explanation:
1.
*Fraction*
Feet/minutes
- Divide
4/1 - 4feet over 1minute
4/1 = 280/x
4x70=280
1x70= 70
70 minutes = 1 hour 10 minutes
2.
1 hour = 65 miles
65x2hours=130miles
2hours= 130 miles
65x3hours= 195miles
3hours = 195miles
PLEASE HELP ASAPP
how much percent is 2882.45 if 3374.60 is 100%
( include working out and show answer as percentage )
Answer: 85.41 percent
Step-by-step explanation:
2882.45 / 3374.60 = 0.8541 or 85.41%
Answer:
85.416%
Step-by-step explanation:
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ose that the revenue in dollars from the sale of x campers R(x)=66,000x+46,000(10+x)^(-1)-8000
$630,463.17
The revenue function in dollars from the sale of x campers is given by:
R(x) = 66,000x + 46,000(10+x)^(-1) - 8000
We can simplify this function as follows:
R(x) = 66,000x + 46,000/(10+x) - 8000
= 66,000x + 4600/(1+x/10) - 8000
To find the x-value that maximizes revenue, we need to find the critical points of the function R(x) and then determine whether each critical point corresponds to a local maximum, local minimum, or neither.
Taking the derivative of R(x) with respect to x, we get:
R'(x) = 66,000 - 4600/(1+x/10)^2
Setting R'(x) equal to zero, we get:
66,000 - 4600/(1+x/10)^2 = 0
Multiplying both sides by (1+x/10)^2, we get:
66,000(1+x/10)^2 - 4600 = 0
Expanding and simplifying, we get:
(x+10)^2 = 44/3
Taking the square root of both sides, we get:
x+10 = ±(2*sqrt(11))/3
Subtracting 10 from both sides, we get:
x = -10 ± (2*sqrt(11))/3
So the critical points of R(x) are:
x = -10 + (2sqrt(11))/3 and x = -10 - (2sqrt(11))/3
To determine whether each critical point corresponds to a local maximum, local minimum, or neither, we can use the second derivative test. Taking the second derivative of R(x), we get:
R''(x) = 9200/(1+x/10)^3
At the critical point x = -10 + (2*sqrt(11))/3, we have:
R''(-10 + (2sqrt(11))/3) = 9200/(1+(-10+(2sqrt(11))/3)/10)^3
= 9200/(1+2*sqrt(11)/30)^3
≈ -318.68
Since R''(-10 + (2sqrt(11))/3) is negative, the critical point x = -10 + (2sqrt(11))/3 corresponds to a local maximum of R(x).
Similarly, at the critical point x = -10 - (2*sqrt(11))/3, we have:
R''(-10 - (2sqrt(11))/3) = 9200/(1+(-10-(2sqrt(11))/3)/10)^3
= 9200/(1-2*sqrt(11)/30)^3
≈ 318.68
Since R''(-10 - (2sqrt(11))/3) is positive, the critical point x = -10 - (2sqrt(11))/3 corresponds to a local minimum of R(x).
Therefore, the x-value that maximizes revenue is x = -10 + (2*sqrt(11))/3, and the maximum revenue is:
R(-10 + (2sqrt(11))/3) = 66,000(-10 + (2sqrt(11))/3) + 46,000/(10-10+(2*sqrt(11))/3) - 8000
≈ $630,463.17
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martin has read 30% of a book he has 56 more pages to finish how many pages are there in the book
Answer: He has 80 pages in his book.
orm the profit function from the cost and revenue function P(x)=-x^(2)+1230x-36000
The profit function is obtained by subtracting the cost function from the revenue function. In other words, Profit = Revenue - Cost.
In the given question, the profit function is already given as P(x) = -x^(2) + 1230x - 36000. This means that the profit is a function of x, which could represent the number of units sold or produced.
To find the profit for a specific value of x, simply substitute the value of x into the profit function and simplify. For example, if x = 100, then the profit would be:
P(100) = -(100)^(2) + 1230(100) - 36000
P(100) = -10000 + 123000 - 36000
P(100) = 77000
Therefore, the profit when x = 100 is $77,000.
Similarly, you can find the profit for any value of x by substituting the value into the profit function and simplifying.
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Which statements are always true regarding the diagram? Select three options. m∠5 + m∠3 = m∠4 m∠3 + m∠4 + m∠5 = 180° m∠5 + m∠6 =180° m∠2 + m∠3 = m∠6 m∠2 + m∠3 + m∠5 = 180°
The angles of the diagram of a triangle is given by the statements ,
a) m∠5 + m∠6 = 180°
b) m∠2 + m∠3 = m∠6
c) m∠2 + m∠3 + m∠5 = 180°
What is a Triangle?A triangle is a plane figure or polygon with three sides and three angles.
A Triangle has three vertices and the sum of the interior angles add up to 180°
Let the Triangle be ΔABC , such that
∠A + ∠B + ∠C = 180°
The area of the triangle = ( 1/2 ) x Length x Base
For a right angle triangle
From the Pythagoras Theorem , The hypotenuse² = base² + height²
if a² + b² = c² , it is a right triangle
if a² + b² < c² , it is an obtuse triangle
if a² + b² > c² , it is an acute triangle
Given data ,
Let the triangle be represented as ΔABC
Now , the measures of angles of a triangle are
Let the Triangle be ΔABC , such that
∠A + ∠B + ∠C = 180°
So , the measure of m∠2 + m∠3 + m∠5 = 180°
And , for a straight line = 180° ( angles in a straight line is 180° )
So , m∠5 + m∠6 = 180°
And , the exterior angle of a triangle = sum of the interior opposite angles
So , m∠2 + m∠3 = m∠6
Hence , the angles of a triangle are solved
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The complete question is attached below :
Which statements are always true regarding the diagram? Select three options.
m∠5 + m∠3 = m∠4
m∠3 + m∠4 + m∠5 = 180°
m∠5 + m∠6 =180°
m∠2 + m∠3 = m∠6
m∠2 + m∠3 + m∠5 = 180°
Help needed please, need it quickly <3
Find the distance from the point (-1, 3, -5) to the plane 4x – 4y + 3z = -2. Find an equation of the plane through the point (-1, -2, 2) and perpendicular to the vector (5, -1, -2). Do this problem in the standard way or WebWork may not recognize a correct answer.
The distance from a point to a plane can be found by using the formula d = |ax + by + cz + d|/√(a^2 + b^2 + c^2), where (a, b, c) are the coefficients of the plane equation and (x, y, z) are the coordinates of the point.
For the first part of the question, the distance from the point (-1, 3, -5) to the plane 4x – 4y + 3z = -2 can be found by plugging in the values into the formula:
d = |(4)(-1) + (-4)(3) + (3)(-5) + (-2)|/√(4^2 + (-4)^2 + 3^2)
d = |-4 - 12 - 15 - 2|/√(16 + 16 + 9)
d = |-33|/√41
d = 33/√41
For the second part of the question, an equation of the plane through the point (-1, -2, 2) and perpendicular to the vector (5, -1, -2) can be found by using the formula ax + by + cz = d, where (a, b, c) are the components of the vector and (x, y, z) are the coordinates of the point. Plugging in the values gives:
(5)(x - (-1)) + (-1)(y - (-2)) + (-2)(z - 2) = 0
5x + 5 - y - 2 - 2z + 4 = 0
5x - y - 2z = -7
Therefore, the equation of the plane is 5x - y - 2z = -7.
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The worth of the equipment after 7 years will be $3145.7
What is a geometric sequence?A geometric sequence is a special type of sequence where the ratio of every two successive terms is a constant.
Given is table with values of product for 3 years, we need to find its worth after 7 years, using the formula given,
aₙ = a₁rⁿ⁻¹
The given formula is of geometric sequence,
r = 9600 / 12000 = 0.8
a₁ = 12000
a₇ = 12000(0.8)⁷⁻¹
a₇ = 12000(0.8)⁶
a₇ = 3145.7
Hence, the worth of the equipment after 7 years will be $3145.7
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Adding & Perform the indicated operations. (9)/(r^(2)-7r)+(10)/(r^(2)+9r)-(1)/(r^(2)+2r-63)
The solution is given by [tex](18r^4+30r^3+25r^2-154r)/(r^6-5r^5+16r^4-45r^3-126r^2+3969r)[/tex]
To perform the indicated operations, we need to find a common denominator for all of the fractions. The common denominator will be the product of the three denominators: [tex](r^2-7r)(r^2+9r)(r^2+2r-63)[/tex].
Next, we will multiply each fraction by the appropriate factor to make the denominators equal. For the first fraction, we will multiply by [tex](r^2+9r)(r^2+2r-63)/(r^2+9r)(r^2+2r-63)[/tex].
For the second fraction, we will multiply by [tex](r^2-7r)(r^2+2r-63)/(r^2-7r)(r^2+2r-63)[/tex]. For the third fraction, we will multiply by [tex](r^2-7r)(r^2+9r)/(r^2-7r)(r^2+9r)[/tex].
After multiplying, we will combine the numerators and keep the common denominator:
[tex](9(r^2+9r)(r^2+2r-63)+10(r^2-7r)(r^2+2r-63)-1(r^2-7r)(r^2+9r))/(r^2-7r)(r^2+9r)(r^2+2r-63)[/tex]
Finally, we will simplify the numerator and denominator as much as possible to get the final answer:
[tex](9r^4+72r^3-567r^2+18r^3+162r^2-1134r+10r^4-70r^(3)+630r^2-20r^3-140r^2+980r-r^4+7r^3-9r^2)/(r^6-7r^5+9r^4-63r^3+2r^5-14r^4+18r^3-126r^2-63r^4+441r^3-567r^2+3969r)[/tex]
[tex](18r^4+30r^3+25r^2-154r)/(r^6-5r^5+16r^4-45r^3-126r^2+3969r)[/tex]
So the final answer is [tex](18r^4+30r^3+25r^2-154r)/(r^6-5r^5+16r^4-45r^3-126r^2+3969r)[/tex]
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Sunscreens block ultraviolet (UV) rays produced by the sun. These rays are harmful and each sunscreen has a Sun Protection Factor (SPF) that tells you how long you can be exposed before you receive 1 minute of UV rays. For example, if you use sunscreen with SPF 15, you will receive 1 minute of UV rays for every 15 minutes in the sun.
a)A sunscreen with SPF 15 blocks 14/15 of the sun’s UV rays. What percent is this?
b)Suppose a sunscreen blocks 80% of the sun’s UV rays. What fraction of the sun’s UV rays does it block?
c)What is the SPF for the sunscreen in part (b)?
d)Carol bought sunscreen with a SPF 30 label. The label claims it block about 97% of the sun’s UV rays. If the SPF 30 label is accurate, is the claim true? Explain.
A sunscreen with SPF 15 blocks 93.33% of the sun's UV rays. A sunscreen that blocks 80% of the sun's UV rays blocks 4/5 of the sun's UV rays.The SPF for the sunscreen in part (b) is 5. The sunscreen with SPF 30 blocks 96.67% of the sun's UV rays.
a) To find the percentage of UV rays that a sunscreen with SPF 15 blocks, we can simply divide 14 by 15 and then multiply by 100 to get the percentage:
14/15 * 100 = 93.33%
So a sunscreen with SPF 15 blocks 93.33% of the sun's UV rays.
b) If a sunscreen blocks 80% of the sun's UV rays, we can write this as a fraction by simply dividing 80 by 100:
80/100 = 4/5
So a sunscreen that blocks 80% of the sun's UV rays blocks 4/5 of the sun's UV rays.
c) To find the SPF for the sunscreen in part (b), we can use the formula:
SPF = 1 / (1 - fraction of UV rays blocked)
Plugging in the fraction of UV rays blocked from part (b), we get:
SPF = 1 / (1 - 4/5) = 1 / (1/5) = 5
So the SPF for the sunscreen in part (b) is 5.
d) To determine if the claim on Carol's sunscreen is true, we can use the formula:
fraction of UV rays blocked = 1 - (1 / SPF)
Plugging in the SPF from the label, we get:
fraction of UV rays blocked = 1 - (1 / 30) = 29/30
Converting this fraction to a percentage, we get:
29/30 * 100 = 96.67%
So the sunscreen with SPF 30 blocks 96.67% of the sun's UV rays. This is close to the claim of 97%, but not exactly the same. Therefore, the claim is not completely accurate, but it is close.
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someone please help me! i dont understand
The required probabilities are,
1. P(A and B) = 7/100.
2. P(AIB) = 16/25
3. P(AIB) = 0.495
4. P(A and B) = 0.7.
What is conditional probability?Conditional probability is a term used in probability theory to describe the likelihood that one event will follow another given the occurrence of another event.
1. Given:
The probabilities are,
P(A) = 1/5, P(BIA) = 7/20.
P(A and B) = P(A ∩ B) = P(BIA) x P(A)
Now, P(A and B) = 7/20 x 1/5 = 7/100.
2. Given:
P(B) = 3/4, P(A and B) = P(A ∩ B) = 12/25
P(AIB) = P(A ∩ B) /P(B) = 12/25 x 4/3 = 16/25
3. Given:
P(B) = 0.5, P(A and B) = P(A ∩ B) = 0.2475
P(AIB) = P(A ∩ B) /P(B) = 0.2475/0.5 = 0.495
4. Given:
P(A) = 0.5, P(BIA) = 0.35.
P(A and B) = P(A ∩ B) = P(BIA) x P(A)
Now, P(A and B) = 0.35/0.5 = 0.7.
Therefore, all the required values are given above.
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Write an equation
parallel to y = -2x - 5
with a y-intercept of
6
Answer:
y=-2x+6
Step-by-step explanation:
When it comes to parallel lines the slopes are the same they just have different y-intercepts.
Our slope for the equation is -2x so we just make a new equation with the same slope.
Since we are asked to put it with a y-intercept of 6 we just add +6 at the end.
Giving us y=-2x+6.
Solve for x. Round to the nearest tenth of a degree, if necessary.
Answer:50
Step-by-step explanation: