Answer:
There are 35 girls in the recycling club
Step-by-step explanation:
4 boys : 7 girls
20 boys : x girls
In order to get to 20, you have to multiply 4 by 5, so multiply 5 to 7 for the girls.
7(5) = 35
There are 35 girls
What is the slope of a line that is perpendicular to the line y = x + 4?
The slope of the line is
Answer:
-1
Step-by-step explanation:
Answer:
- 1/6 is correct
perpendicular refers to the opposite of 1/6 therefor being negative 1/6
Step-by-step explanation:
PLEASE HELP! Thanks if you do!
Answer:
x=2 and y=−3
Step-by-step explanation:
Ella and some friends are going to a movie. Each movie ticket costs $5. Create an equation that shows the relationship between how many friends, n, attend the movie and the total cost in dollars, c.
Answer:
lets say ella and 3 other friends went, so since there is 4 people in total, there will be 4 $5 dollar tickets, so you multiply 5 and 4 which is $20.
Step-by-step explanation:
6. If the sequence below is an arithmetic sequence then what will the next two numbe
the sequence be?
Sequence: 3, 9....
a. 18, 36
c. 15, 45
b. 27,81
d. 15, 21
The contents of seven similar containers of sulfuric acid are 9.8, 10.2, 10.4, 9.8,10.0, 10.2, and 9.6 liters. Find a 95% confidence interval for the mean contents of all such containers, assuming an approximately normal distribution. (Round your answers into two decimal places.)
Answer:
The 95 confidence interval is [tex]9.738 < \mu < 10.262 [/tex]
Step-by-step explanation:
The sample size is n = 7
The sample data is 9.8, 10.2, 10.4, 9.8,10.0, 10.2, and 9.6 liters
Generally the sample mean is mathematically represented as
[tex]\= x = \frac{\sum x_i }{n }[/tex]
=> [tex]\= x = \frac{ 9.8 + 10.2 + 10.4 +\cdots + 9.6}{7 }[/tex]
=> [tex]\= x = 10[/tex]
Generally the standard deviation is mathematically represented as
[tex]\sigma = \sqrt{\frac{\sum ( x_i - \= x)^2 }{n-1} }[/tex]
=> [tex]\sigma = \sqrt{\frac{ ( 9.8 - 10)^2 + ( 10.2 - 10)^2+ \cdots + ( 9.6 - 10)^2}{7-1} }[/tex]
=> [tex]\sigma =0.283[/tex]
Note : We are making use of t distribution because n is small i.e n < 30
Generally the degree of freedom is mathematically represented as
[tex]df = n - 1[/tex]
=> [tex]df = 7 - 1[/tex]
=> [tex]df = 6[/tex]
From the question we are told the confidence level is 95% , hence the level of significance is
[tex]\alpha = (100 - 95 ) \%[/tex]
=> [tex]\alpha = 0.05[/tex]
Generally from the t distribution table the critical value of at a degree of freedom of is
[tex]t_{\frac{\alpha }{2}, 6 } = 2.447 [/tex]
Generally the margin of error is mathematically represented as
[tex]E = t_{\frac{\alpha }{2} , 6} * \frac{\sigma }{\sqrt{n} }[/tex]
=> [tex]E = 2.447 * \frac{0.283}{\sqrt{7} }[/tex]
=> [tex]E = 0.262 [/tex]
Generally 95% confidence interval is mathematically represented as
[tex]\= x -E < \mu < \=x +E[/tex]
=> [tex]10 -0.262 < \mu <10 + 0.262[/tex]
=> [tex]9.738 < \mu < 10.262 [/tex]
Write −1.05 as a mixed number in simplest form.
Answer:
-1 1/20.
Step-by-step explanation:
0.05 = 5/100
= 1/20
So -1.05 = -1 1/20.
How many times can 8 go into 0?
Answer:
0 times because 8 is greater than 0
Step-by-step explanation:
Answer:
the answer would be 0 because if you try to put 8 into 0, it wont so your answer would be 0
Help. (Math) The following construction was performed. What distance did the compass have to be set to sweep the two arcs through point T?
1. RP
2. QR
3. QT
4. QP
Divide polynomials using long division
(10h+20)÷(h+2)
Answer:
10
Step-by-step explanation:
Put the h+2 on the outside and 10h+20 on the inside
h+2 can go into 10h+20 ten times.
So the final answer is 10
Translate the sentence into an equation.
Seven times the sum of a number and 2 is 6.
Use the variable y for the unknown number.
Answer:
7(y+2)=6
Step-by-step explanation:
its right
6. Find CA*
Please help it’s so confusing
Answer:
The answer is 19.
Step-by-step explanation:
3x+1+12=9x+1
3x+13=9x+1
13=6x+1
12=6x
x=2
3(2)+1+12=19
Answer:
CA = 19
Step-by-step explanation:
3x + 1 + 12 = 9x + 1
combine like terms
3x + 13 = 9x + 1
Subtraction property of equality
3x - 3x + 13 = 9x - 3x + 1
13 = 6x + 1
Subtraction property of equality
13 - 1 = 6x + 1 - 1
12 = 6x
Division property of equality
12/6 = 6x/6
2 = x
Symmetric property of equality
x = 2
Substitute x for 2
9(2) + 1 = 19
To simplify an expression, should we apply the Order of Operations in top-down or bottom-up order?
Answer:
To simplify an expression, we should apply the order of operations top-down
Step-by-step explanation:
The order of operation can be represented as;
BODMAS
If we have an expression to simplify, then the order of operations is from left to right
This means that it is in a top-down fashion i.e from brackets to subtraction and not bottom-up order from subtraction to bracket
Let 2x - 1 represents the time Anna and Tamara travel the first two days
and 3x - 4 represents the time they travel the last two days.
Write an algebraic expression that represents the total time
Anna and Tamara travel over the four days.
Answer:
5x-5
Step-by-step explanation:
add the expression and simplify 2x - 1 + 3 x -4 add 2x and 3x
5x-1-4 subtract 4 from -1
equals 5x-5
HURRY ILL GIVE 10 BRAINLY POINTS
What is 1 times 300
Answer:
300
Step-by-step explanation:
Answer:
300
Step-by-step explanation:
300 x 1 = 300
1 x 300 = 300
whats 2+2 will offer nothing
Answer:
4
Step-by-step explanation:
Given g(x) = -3x + 1, find g(2).
Answer:
- 5
Step-by-step explanation:
Step 1:
g ( x ) = - 3x + 1 Function
Step 2:
g ( x ) = - 3 ( 2 ) + 1 Input x
Step 3:
g ( x ) = - 6 + 1 Multiply
Answer:
g ( x ) = - 5 Add
Hope This Helps :)
Consider the following.
P = −0.1s3 + 6s2 + 400.
Required:
a. Find the amount s of advertising (in thousands of dollars) that maximizes the profit P (in thousands of dollars).
b. Find the point of diminishing returns.
Answer:
A) s = $40 (in thousands of dollars)
B) point of diminishing returns is at;
(20, 2000) in thousands of dollars
Step-by-step explanation:
We are given the profit function as;
P = −0.1s³ + 6s² + 400
A) To maximize the profit, we need to find the first derivative and equate it to zero.
Thus;
dP/ds = -0.3s² + 12s
At dP/ds = 0, we have;
-0.3s² + 12s = 0
0.3s² = 12s
0.3s = 12
s = 12/0.3
s = $40 (in thousands of dollars)
B) To find the point of diminishing returns, we need to find the 2nd derivative of the given profit function and equate to zero.
Thus;
d²P/ds² = -0.6s + 12
At d²P/ds² = 0, we have;
-0.6s + 12 = 0
0.6s = 12
s = 12/0.6
s = 20
At s = 20,
P = −0.1(20)³ + 6(20)² + 400
P = -800 + 2400 + 400
P = 2000
Thus; point of diminishing returns is at;
(20, 2000) in thousands of dollars
308 car stereos were recently sold in a car audio store. 112 had a CD player, 115 had a cassette player, and 40 had both a CD and a cassette player. How many had a CD player only
Answer: The number of car stereos had a CD player only = 72
Step-by-step explanation:
As per given,
Number of car stereos had CD player = 112
Number of car stereos had both CD and a cassette player= 40
Then, the number of car stereos had a CD player only = (Number of car stereos had CD player ) -(Number of car stereos had both CD and a cassette player)
= 112- 40
= 72
Hence, The number of car stereos had a CD player only = 72
Evaluate the function at the indicated values. (If an answer is undefined, enter UNDEFINED.)
f(x) = x2 + 7x
f(0) = 0
Correct: Your answer is correct.
f(3) = 30
Correct: Your answer is correct.
f(−3) = −12
Correct: Your answer is correct.
f(a) = a
Incorrect: Your answer is incorrect.
f(−x) =
f
1
a
=
Answer:
a) The function is equal to 0 when [tex]x = 0[/tex].
b) The function is equal to 30 when [tex]x = 3[/tex].
c) The function is equal to -12 when [tex]x = -3[/tex].
d) The function is equal to [tex]a\cdot (a+7)[/tex] when [tex]x = a[/tex].
e) The function is equal to [tex]x\cdot (x-7)[/tex] when [tex]x = -x[/tex].
Step-by-step explanation:
To this respect we must keep in mind that this exercise consists in evaluating given function at different values. Let [tex]f(x) = x^{2}+7\cdot x[/tex] the function to be evaluated:
a) [tex]x = 0[/tex]
[tex]f(0) = 0^{2}+7\cdot (0)[/tex]
[tex]f(0) = 0[/tex]
The function is equal to 0 when [tex]x = 0[/tex].
b) [tex]x = 3[/tex]
[tex]f(3) = 3^{2}+7\cdot (3)[/tex]
[tex]f(3) = 30[/tex]
The function is equal to 30 when [tex]x = 3[/tex].
c) [tex]x = -3[/tex]
[tex]f(-3) = (-3)^{2}+7\cdot (-3)[/tex]
[tex]f(-3) = -12[/tex]
The function is equal to -12 when [tex]x = -3[/tex].
d) [tex]x = a[/tex]
[tex]f(a) = a^{2}+7\cdot a[/tex]
[tex]f(a) = a\cdot (a+7)[/tex]
The function is equal to [tex]a\cdot (a+7)[/tex] when [tex]x = a[/tex].
e) [tex]x = -x[/tex]
[tex]f(-x) = (-x)^{2}+7\cdot (-x)[/tex]
[tex]f(-x) = x^{2} -7\cdot x[/tex]
[tex]f(-x) = x\cdot (x-7)[/tex]
The function is equal to [tex]x\cdot (x-7)[/tex] when [tex]x = -x[/tex].
The perimeter of a rectangular outdoor patio is 66 ft. The length is 3 ft greater than the width. What are the dimensions of the patio?
Answer:
width = 15 ft
length = 18 ft
Step-by-step explanation:
lets assume the width is w, and length is l.
For the first equation, we all know that a rectangle is 2 widths and 2 lengths added up, which in "math" language looks like this:
2w+2l= 66
for the second equation, the problem says that the length is 3 ft greater than the width. From there, we can derive the equation:
w+3 = l
Now you can substitute one of the variables, length or width, but it is easier to do length. The equation ends up being:
2(w+3) + 2w = 66
Distributive property:
2w+6+2w = 66
which is equal to:
4w+6 = 66
which finally is:
w=15 ft.
Now that we know the width, we can just add 3 to the width to get the length, according to the problem. You get:
L = 18 ft.
The double number line shows that 5 pounds of avocados cost $9.
0
Avocados
5
(pounds)
Cost
H
(dollars)
0
9
Based on the ratio shown in the double number line, what is the cost for 1 pound of avocados?
S
Answer:
$1.8
Step-by-step explanation:
Given :
5 pounds of avocado = $9
This means that 5 pounds of avocado cost $9; The cost of 1 pound of Avocado can be obtained thus ;
Let cost of 1 pound of avocado = a
5 pounds = $9
1 pound = a
Cross multiply
5 * a = $9 * 1
5a = 9
Divide both sides by 5
5a / 5 = 9/5
a = 1.8
Hence, 1 pound of avocado will cost $1.8
In a sample of 1000 U.S. adults. 217 think that most celebrities are good role models. Two U.S. adults are selected from this sample without replacement.
Find the probability that both adults think most celebrities are good role models
(Round to three decimal places as needed.)
Find the probability that neither adult thinks most celebrities are good role models
(Round to three decimal places as needed.)
Find the probability that at least one of the two adults thinks most celebrities are good role models
(Round to three decimal places as needed)
Answer:
(a) 0.047
(b) 0.613
(c) 0.387
Step-by-step explanation:
In a sample of 1000 U.S. adults 217 think that most celebrities are good role models.
The proportion of U.S. adults who think that most celebrities are good role models is, p = 0.217.
Two U.S. adults are selected from this sample without replacement.
Let X denote the number of U.S. adults who think that most celebrities are good role models.
Both the individuals are independent of each other.
The random variable X follows a binomial distribution with parameters n = 2 and p = 0.217.
The probability mass function of X is:
[tex]P(X=x)={2\choose x}(0.217)^{x}(1-0.217)^{2-x};x=0,1,2[/tex]
(a)
Compute the probability that both adults think most celebrities are good role models as follows:
[tex]P(X=2)={2\choose 2}(0.217)^{2}(1-0.217)^{2-2}\\=1\times 0.047089\times 1\\=0.047[/tex]
Thus, the probability that both adults think most celebrities are good role models is 0.047.
(b)
Compute the probability that neither adult thinks most celebrities are good role models as follows:
[tex]P(X=0)={2\choose 0}(0.217)^{0}(1-0.217)^{2-0}\\=1\times 1\times 0.613089\\=0.613[/tex]
Thus, the probability that neither adult thinks most celebrities are good role models is 0.613.
(c)
Compute the probability that at least one of the two adults thinks most celebrities are good role models as follows:
[tex]P(X\geq 1)=1-P(X<1)\\=1-P(X=0)\\=1-0.613\\=0.387[/tex]
Thus, the probability that at least one of the two adults thinks most celebrities are good role models is 0.387
In the figure, <6 and <3 are
Answer:B
Step-by-step explanation
What is the minimum possible value of this decimal? Use words, pictures, or numbers to explain your reasoning.
Answer:
if 2.4 is there it will become -2. 4
12. Which equation describes the line with a slope of 2 that contains the point (4, -3)?
a. y - 4 = 2(x+3)
c. y +3 = 2(x-4)
b. 2(y - 3) = x +4
d. 2(y+4) =x+3
If p=-4 and q=5 evaluate the following:
pq-(p-q)
= -11
p^2+3q
Answer:
pq - (p-q) = -11 checked
Step-by-step explanation:
p= -4, q = 5,
pq= -20, p-q = (-4) - 5 = -9
pq - (p-q) = -20 - (-9) -20 +9 = -11
How do you solve this problem ?
Answer: 7.04
Step-by-step explanation:
Subtract 154.94- 147.88 because its asking how much more you made on the second paycheck then the first. So in order to get the answer subtract
A certain code is a sequence of 7 digits. What is the probability of generating 7 digits and getting the code consisting of 1, 2, . . ., 7 if each digit can be repeated?
Answer:
The code has 7 digits:
Here you are asking:
"What is the probability that the code is consisting only of the digits {1, 2, 3, 4, 5, 6, 7}?"
Ok, first we must calculate the number of all the possible codes.
Suppose that each digit is an independent event.
Each one of those events has 10 possible outcomes {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
And we have 7 of those.
The total number of possible combinations is equal to the product of the number of outcomes for each event, then the total number of possible combinations is:
C = 10^7.
Now let's calculate the number of possible codes if we only use the digits in the restriction.
We can do exactly the same as above, but now in each case, we have 7 possible outcomes for each digit, then in this case the number of possible combinations is:
c = 7^7.
Now the probability of generating at random a code that only uses the digits {1, 2, 3, 4, 5, 6, 7} is equal to the quotient between the number of codes that only use these digits, and the total number of possible codes.
P = c/C = (7^7)/(10^7) = (7/10)^7 = 0.082
The temperature in a town is 27.6°F during the day and -13.9°F at night. Find the difference in the temperatures.
Answer:
41.25 I believe
Step-by-step explanation:
Answer:
41.5 degree difference
Step-by-step explanation:
A database system assigns a 32-character ID to each record, where each character is either a number from 0 to 9 or a letter from A to F. Assume that each number or letter is equally likely. Find the probability that at least 16 characters in the ID are numbers. Use a TI-83, TI-83 plus, or TI-84 calculator to find the probability.
Answer:
0.948
Step-by-step explanation:
Given that:
Number of character ID = 32
Numbers = 0 - 9 = 10
Alphabets = A - F = 6
Likelihood of each number or alphabet is equal
Probability that atleast 16 characters in the ID are numbers
Probability of success (p) = required outcome / Total possible outcomes
p = 10/(10 + 6) = 5/8
P(at least 16 numbers), similar to 1 - p(at most 15)
Using the specified calculator :
Binomcdf(number of trials, p, 15) = 0.0520
1 - 0.0520 = 0.948
