Find r for the geometric series with s5 = 484, a1 = 4, a5 = 324
A purse contains 5-cent coins and 10-cent coins worth a total of $1.05. If the 5-cent coins were replaced with 10-cent coins and the 10-cent coins were replaced with 5-cent coins, the coins would be worth a total of $2.15. How many coins are in the purse? HELP PLEASE WITH WORK
Answer:
The other person should be correct
Step-by-step explanation:
Please help me with this!
Find the general solution of x'1 = 3x1 - x2 + et, x'2 = x1.
Final answer:
To find the general solution of the given system of differential equations, first, solve the second equation for x1 in terms of x2. Then substitute x1 into the first equation and simplify to isolate x'2. Next, solve the second equation for x2 in terms of x1 and substitute x2 into the first equation. Simplify and rearrange to isolate x'1. Finally, solve the resulting differential equations to find the general solution.
Explanation:
To find the general solution of the given system of differential equations:
x'1 = 3x1 - x2 + et, x'2 = x1
Step 1: Solve the second equation for x1 in terms of x2:
x1 = x'2
Step 2: Substitute x1 into the first equation:
x'1 = 3(x'2) - x2 + et
Step 3: Simplify and rearrange the equation to isolate x'2:
x'2 = (x'1 + x2 - et)/3
Step 4: Solve the second equation for x2 in terms of x1:
x2 = x'1 - 3x'2 + et
Step 5: Substitute x2 into the first equation:
x'1 = 3x1 - (x'1 - 3x'2 + et) + et
Step 6: Simplify and rearrange the equation to isolate x'1:
x'1 = (3x'2 + x'1 - 2et)/3
Now we have two differential equations for x'1 and x'2 in terms of each other. These can be solved using standard methods to find the general solution.
Find a generating function for the number of integer solutions of 2x+3y+7z=r
Mindy is training to run a marathon. She runs 4 miles each day. Write an equation that would represent the number of miles m, she runs on a given day, d.
A couple has 12 children, what is the probability that child number 11 is female?
The probability is 1/12.
What is probability?Probability is a measure of the likelihood of an event to occur. Many events cannot be predicted with total certainty. We can predict only the chance of an event to occur i.e. how likely they are to happen, using it.
Given:
Total children = 12
There is possibility of girl number 11.
So, the probability that child number 11 is female
=1/12.
Hence, the probability is 1/12.
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Final answer:
The probability that the 11th child is female is 50%, assuming an equal chance for the birth of either sex and that the gender of the previous children does not affect this outcome.
Explanation:
The question at hand is a basic probability question in the realm of mathematics. It attempts to find the likelihood of an event that is purely random and independent of previous outcomes. The event in question is the sex of a newborn child, which can either be male or female, generally with equal likelihood.
To determine the probability that child number 11 is female, we assume a 50% chance for either sex, since the likelihood of having a boy or girl is typically equal. The sex of the previous children has no influence on the gender of the next child. Therefore, the probability of child number 11 being female is simply 1/2 or 50%.
It is important to understand that each child's sex is determined independently of their siblings. This is akin to flipping a fair coin where each flip is independent of the previous flips.
Help Please..
On a regional map, one inch represents 68 miles. How many miles apart are two cities that are three inches apart on the map?
A scatter plot is shown below:
Which two ordered pairs can be joined to draw most accurately the line of best fit on this scatter plot?
(4, 9.5) and (10, 5.5)
(5, 0) and (10, 10)
(0, 6) and (5, 0)
(0, 9.5) and (10, 1.5)
Answer:
(0, 9.5) and (10, 1.5)
Step-by-step explanation:
as we can see the closest points that assimilate the scatter plot, these is the answer.
1 2 3 4 5 6 7 8 9 10 The two conditional relative frequency tables below show the results of a survey asking students whether they are taking a foreign language or not. Table B: Frequency of Foreign-Language Studies by Row Which table could be used to answer the question "Assuming a student is taking a foreign language, what is the probability the student is also in high school?” Table A, because the given condition is that the student is in high school. Table A, because the given condition is that the student is taking a foreign language. Table B, because the given condition is that the student is in high school. Table B, because the given condition is that the student is taking a foreign language.
Answer:
B. Table A, because the given condition is that the student is taking a foreign language.
Step-by-step explanation:
ED 2020
Determine whether the lines l1 and l2 are parallel, coincident, skew, or intersecting. if they intersect, find the point of intersection: ℓ1:x1(t)=1−6t,y1(t)=2+9t,z1(t)=−3t ℓ2:x2(u)=2+2u,y2(u)=3−3u,z2(u)=u
To determine whether the lines are parallel, coincident, skew, or intersecting, we first analyze the direction vectors of both lines obtained from the parametric equations. The lines are not parallel or coincident as they're not proportional. They could be intersecting or skew, which we can confirm by finding a potential point of intersection.
Explanation:To determine the relationship between lines ℓ1 and ℓ2, we should analyze the direction vectors of both lines. The coefficients of t or u in the parametric equations for the lines refer to the direction vectors. For ℓ1, the direction vector is (-6, 9, -3). For ℓ2, it's (2, -3, 1).
Lines are parallel if their direction vectors are proportional, and intersect if they pass through a common point and their direction vectors are not proportional. Lines are coincedent if all corresponding points are identical, while skew lines are nonintersecting, nonparallel lines.
Given the direction vectors, we can see they are not proportional. Hence, ℓ1 and ℓ2 are neither parallel nor coincident. They might be intersecting or skew. To distinguish between these two, we need to try to find a point of intersection by equating ℓ1 and ℓ2 and solving for t and u. If a solution exists, the lines intersect at that specific point; if no solution exists, the lines are skew.
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What number goes in the missing space?
The summation expression in the following series has an absolute value in it. Expand and evaluate the summation notation. What is the sum of the series?
To expand and evaluate the summation notation with an absolute value, we can use the binomial theorem. The expanded form of the series will depend on whether the sum inside the absolute value is positive or negative. Substituting the given values and simplifying the expression will give the sum of the series.
Explanation:A binomial expansion is a way of expressing an algebraic quantity as a sum of an infinite series of terms. In this case, we have an absolute value in the summation expression.
To expand and evaluate the summation notation, we can use the binomial theorem.
The binomial theorem states that (a + b)^n = C(n,0)a^n + C(n,1)a^(n-1)b + C(n,2)a^(n-2)b^2 + ... + C(n,n)b^n, where C(n,k) represents the binomial coefficient.
In the given case, we have an expression of the form |a + b|.
To expand this, we can consider two cases: a + b ≥ 0 and a + b < 0. If a + b ≥ 0, then |a + b| = a + b. If a + b < 0, then |a + b| = -(a + b).
Thus, the expanded form of the series will be a + b when a + b ≥ 0, and -(a + b) when a + b < 0.
To evaluate the series, substitute the given values for a and b into the expanded form and simplify the expression.
A grain distributor can process 14.6 tons of grain an hour.How much can the distributor process in 8.75 hours?
The grain distributor can process 127.75 tons of grain in 8.75 hours.
Explanation:To find out how much the distributor can process in 8.75 hours, you can multiply the amount of grain it can process in one hour by the number of hours. The distributor can process 14.6 tons of grain in an hour, so to find out how much it can process in 8.75 hours, you would multiply 14.6 by 8.75.
14.6 x 8.75 = 127.75
Therefore, the distributor can process 127.75 tons of grain in 8.75 hours.
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Miguel ordered a rectangular print for his bedroom. The print is 78 feet wide and 135 feet long.
What is the area of the print?
An elephant can run mile in 36 seconds. Which of the following correctly shows this rate as miles per hour? = 25 miles per hour = 144 miles per hour = 25 miles per hour = 144 miles per hour
Select all the expressions that have the following quotient
The expression that have the following quotient is:
[tex]\dfrac{-4x^2+20x-25}{-2x+5}[/tex] [tex]\dfrac{-14x^2+35x}{-7x}[/tex] [tex]\dfrac{12x^2-58x+70}{6x-14}[/tex]Step-by-step explanation:1)
[tex]\dfrac{-4x^2+20x-25}{-2x+5}[/tex]
It could also be written as:
[tex]\dfrac{-(5-2x)^2}{5-2x}\\\\\\=-(5-2x)\\\\\\=2x-5[/tex]
Hence, we get the quotient:
[tex]2x-5[/tex]
Option: (1) is correct.
2)
[tex]\dfrac{-14x^2+35x}{-7x}[/tex]
which is simplified as follows:
[tex]\dfrac{-7x(2x-5)}{-7x}\\\\\\=2x-5[/tex]
Option: (2) is correct.
3)
[tex]\dfrac{12x^2-58x+70}{6x-14}[/tex]
which is simplified as follows:
[tex]=\dfrac{2(2x-5)(3x-7)}{2(3x-7)}\\\\\\=2x-5[/tex]
Hence, option: (3) is correct.
4)
[tex]\dfrac{6x^2-10x-4}{3x+1}[/tex]
On simplifying:
[tex]\dfrac{2(3x+1)(x-2)}{3x+1}\\\\\\=2(x-2)\\\\\\=2x-4[/tex]
Hence, option: (4) is incorrect.
5)
[tex]\dfrac{18x-45}{9x}[/tex]
on simplifying:
[tex]\dfrac{9(2x-5)}{9x}\\\\\\=\dfrac{2x-5}{x}[/tex]
Hence, option: (4) is incorrect.
Find a quadratic function associated with vertex (h, k) = (2, 1) and point (x, y) = (6, 7) that the parabola passes through.
To find the quadratic function with vertex (2, 1) that passes through (6, 7), use the vertex form of a quadratic equation and solve for 'a' using the given point. The resulting function is y = ([tex]\frac{3 }{ 8}[/tex])(x - 2)² + 1.
To find a quadratic function associated with the vertex (h, k) = (2, 1) and a point (x, y) = (6, 7) that the parabola passes through, we need to use the vertex form of a quadratic equation:
y = a(x - h)² + k
Since we know the vertex (h, k), we can substitute h=2 and k=1 into the equation, which gives us:
y = a(x - 2)² + 1
We also know that the parabola passes through the point (6,7), so we can substitute x=6 and y=7 into the equation to find the value of 'a':
7 = a(6 - 2)² + 1
7 = a(4)² + 1
6 = 16a
[tex]a = \frac{6 }{ 16} = \frac{3 }{ 8}[/tex]
Now, substituting the value of 'a' into the vertex form, we get the quadratic function:
y = ([tex]\frac{3 }{ 8}[/tex])(x - 2)² + 1
At what rate must $287.50 be compounded annually for it to grow to $572.86 in 8 years?
If p(a) = 0.50, p(b) = 0.60, and p(a intersection
b.= 0.30, what is the p(a union b)? enter your answer as a decimal rounded to two places.
The probability is 0.80.
To find the probability of the union of two events, calculate the sum of their individual probabilities and subtract the probability of their intersection.
The probability of the union of events A and B (P(A ∪ B)) can be calculated using the formula:
P(A ∪ B) = P(A) + P(B) - P(A ∩ B)
Given P(A) = 0.50, P(B) = 0.60, and P(A ∩ B) = 0.30, substitute these values into the formula to find P(A ∪ B) = 0.50 + 0.60 - 0.30 = 0.80
David was looking at his limousine bill and saw that the total number of miles he has ridden in the car was tracked, as shown below: Month Miles 5 580 6 695 7 810 8 925 The function representing David's miles per month is f(m) = 115m + 5. What does the 115 represent?
The number of additional miles each month.
In the decimal value 4256, the weight of the numeral 2 is ________.
Answer: 200
Explanation:
Numeral system is a system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. The same sequence of symbols may represent different numbers in different numeral systems.
For example:
2356:-
We start from left
6 = 6*10⁰ = 6*1 = 6
5 = 5*10¹ = 5*10 = 50
3 = 3*10² = 3*100 = 300
2 = 2*10³ = 2*1000 = 2000
Similarly,
Given number is 4256
6 = 6*10⁰ = 6*1 = 6
5 = 5*10¹ = 5*10 = 50
2 = 2*10² = 2*100 = 200
I think that the answer is c can somebody help me out ?
what expression must the center cell of the table below contain so that the sums of each row, each column, and each diagonal are equivalent?
x 8x -3x
-2x ? 6x
7x -4x 3x
The missing value in the center cell (y) should be 2x to achieve equivalent sums in each row, column, and diagonal.
To achieve equivalent sums in each row, column, and diagonal, we need to determine the missing value in the center cell. Let's denote the missing value as "y."
The table is as follows:
x 8x -3x
-2x y 6x
7x -4x 3x
Now, let's consider the sum along each row, column, and diagonal:
Rows:
x + 8x - 3x = 6x (1st row)
-2x + y + 6x = 4x + y (2nd row)
7x - 4x + 3x = 6x (3rd row)
Columns:
x - 2x + 7x = 6x (1st column)
8x + y - 4x = 4x + y (2nd column)
-3x + 6x + 3x = 6x (3rd column)
Diagonals:
x + y + 3x = 4x + y (from top-left to bottom-right)
-3x + y + 7x = 4x + y (from top-right to bottom-left)
To ensure equivalent sums, the expression for "y" in the center cell should be such that 4x + y = 6x. Solving for "y," we find y = 2x.
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How do i solve a Real world problem that involves finding the product of a fraction and a mixed number?
Combine the like terms to create an equivalent expression. 12p + p
Answer: The equivalent expression of the given terms is 13 p
Step-by-step explanation:
Like terms are defined as the terms which have same variable. Mathematical operation are applied on these terms.
Unlike terms are defined as the terms which do not have same variable. Mathematical operation are not applied on these terms.
For Example: [tex]x^2+2x+5x^2+7[/tex]
In the above expression, [tex]x^2\text{ and }5x^2[/tex] are the like terms because they have same variable which is '[tex]x^2[/tex]'
In the given expression: 12 p + p
Both the terms are like terms, and thus the operation can be applied.
Hence, the equivalent expression of the given terms is 13 p
We have enough material to build a fence around a station that has a perimeter of 180 feet. The width of the rectangular space must be 30 1/4 feet. What must the length be?
An urn contains eight blue balls and seven yellow balls. if six balls are selected randomly without being replaced, what is the probability that of the balls selected, two of them will be blue and four of them will be yellow
Here is the sample space for three tosses of a coin.
{HHH, HHT, HTH, HTT, THH, THT, TTH, THT}
Calculate the probability that this compound event will yield a result of 2 heads and 1 tail (in any order)
A. 0.125
B. 0.25
C. 0.333
D. 0.375
The probability that the compound event of tossing a coin 3 times will yield a result of 2 heads and 1 tail (in any order) is option D. 0.375.
Given that:
A coin is tossed three times.
The sample space is given as:
{HHH, HHT, HTH, HTT, THH, THT, TTH, THT}
Now, it is required to find the probability of getting 2 heads and 1 tail in any order.
Total number of outcomes = number of elements in the sample space
= 8
Outcomes that yield two heads and one tail = {HHT, HTH, THH}
Number of outcomes that yield two heads and one tail = 3
So, the probability is
[tex]P(\text{2 heads and 1 tail})=\frac{3}{8}\\[/tex]
So, P = 0.375
Hence, the correct option is D.
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I have no idea how to do this equation, please help