Answer:
y= -3x+2
Step-by-step explanation:
[tex]y - ( - 5) = - 3(x - ( - 1)) \\ y + 5 = - 3x - 3 \\ y = - 3x + 2[/tex]
A study involves a population of 400 tall women. This population has a mean height of 179.832 cm and a standard deviation of 12.192 cm. If 50 of these women are randomly selected, find the probability that the mean for this sample group is above 182.88
Answer: 0.0386
Step-by-step explanation:
Given: The population of 400 tall women has a mean height[tex](\mu)[/tex] of 179.832 cm and a standard deviation[tex](\sigma)[/tex] of 12.192 cm.
Let X be a random variable that represents the height of woman.
Sample size : n= 50
The probability that the mean for this sample group is above 182.88 will be :
[tex]P(\overline{X}>182.88)\\\\=P(\dfrac{\overline{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}>\dfrac{182.88-179.832}{\dfrac{12.192}{\sqrt{50}}})\\\\ =P(Z>1.7678)\ \ \ [Z=\dfrac{\overline{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}]\\\\=1-P(Z<1.7678)\\\\=1-0.9614\ \ \ [\text{By p-value table}]\\\\= 0.0386[/tex]
Hence, Required probability = 0.0386
Elwin is attempting to read a 480 page book in 28 days. He reads the first 60 pages in 4 days. At this rate, will he finish the book in time? Show your work and/or explain your reasoning.
Answer:
No, he won't
Step-by-step explanation:
Given
Target = 480 pages in 28 days
Rate = 60 pages in 4 days
Required:
Determine if he'll reach his target
The rate can be expressed using:
[tex]Rate = \frac{Pages}{Days}[/tex]
So, we have:
[tex]Rate = \frac{60\ pages}{4\ days}[/tex]
Multiply the fraction by [tex]\frac{7}{7}[/tex]
[tex]Rate = \frac{60\ pages}{4\ days} * \frac{7}{7}[/tex]
[tex]Rate = \frac{60\ pages * 7}{4\ days * 7}[/tex]
[tex]Rate = \frac{420\ pages}{28\ days}[/tex]
This can be interpreted as: 420 pages in 28 days
And his target is 480 pages in 28 days
Hence, he wont finish the book at that rate
The graph of exponential function f(x) is shown. What is the value
The value of f(6)=64
Given :
The graph of an exponential function .
Explanation :
We need to find out f(6) using the given graph .
To find f(x), first we find out the function f(x) using the graph .
Pick any two points from the graph (0,1) and (1,2)
General form of exponential function is [tex]y=ab^x[/tex]
Substitute (0,1) in general equation
[tex]1=ab^0\\1=a\\a=1[/tex]
Now we plug in (1,2) in the equation
[tex]y=ab^x\\2=1(b)^1\\2=b\\b=2[/tex]
Substitute a=1, b=2 in [tex]f(x)=ab^x\\[/tex]
[tex]f(x)=1(2)^x\\f(x)=2^x[/tex]
To find out f(6), we plug in 6 for x in f(x)
[tex]f(x)=2^x\\f(6)=2^6\\f(6)=64[/tex]
Learn more : brainly.com/question/3971260
Explain how to change an Linear Equation from Standard form to slope intercept form. Tell me two reasons that it is important to be able to have the linear equation in slope intercept form.
Answer:
A) The standard form of a linear equation is given as follows;
Ax + By = C
In order to change the above linear equation from standard form to slope and intercept form which is the form y = mx + c, we have;
1) Move the x-variable (and its coefficient) to the right side of the equation as follows;
By = C - Ax
2) Divide both sides of the equation above equation, by the coefficient of y as follows;
By/B = C/B - Ax/B
y = C/B - A/B·x
3) Rearrange the right hand side of the above equation
y = -A/B·x + C/B
The equation given above is in the slope and intercept form, y = m·x + c, where;
m = -A/B
c = C/B
B) Two reasons why it is important to have a slope and intercept form of a linear equation are;
1) The slope and intercept for shows the initial value of the dependent variable, y, when the dependent variable, x is 0 which is the constant term, c, in the equation
2) The slope coefficient term, m, in the slope and intercept form of a linear equation shows the rate of increase of the y-coordinate value with a unit increase in x-coordinate value.
Step-by-step explanation:
Each Saturday morning, Beau practices throwing pitches to his dad. His dad estimates the probability of each pitch Beau throws being a "strike" is 0.3. If each pitch is considered to be independent, what is the probability that the next three pitches thrown by Beau will all be strikes?
Answer: 0.27
Step-by-step explanation:
Given that :
Probability of being a strike ; p(strike) = 0.3
Note : the probability of each pitch Beau is independent :
Probability that next three will be a strike :
p(strike) * p(strike) * p(strike)
= 0.3 * 0.3 * 0.3
= 0.27
please help me find the area of this triangle!!! i put this question at 25 points!!!!
Answer:I believe the answer is 12
Step-by-step explanation: if you split the triangle into 2 then you can do 1/2bh then add them. (1/2)(2)(3)+(1/2)(6)(3)=12
What is the volume of a rectangular prism with the dimensions 7m 8m and 9m
Answer:
504 m³
Step-by-step explanation:
The volume of the rectangular prism is V = 504 m³
What is the volume of a prism?A three-dimensional solid object called a prism has two identical ends. It consists of equal cross-sections, flat faces, and identical bases. Without bases, the prism's faces are parallelograms or rectangles.
The volume of a prism is the product of its base area and height
Volume of Prism = B x h
where B = base area of prism
h = height of prism
Given data ,
Let the volume of the prism be represented as V
Now , the value of V is
Let the height of the rectangular prism be H = 9 m
Let the length of the rectangular prism be L = 7 m
Let the width of the rectangular prism B = 8 m
where the base area of prism B = L x W = 7 x 8 = 56 m²
Now , the volume of the prism V = B x H
The volume of prism V = 56 x 9 = 504 m³
Hence , the volume of the rectangular prism V = 504 m³
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Danielle takes her dog to be groomed. The fee to groom the dog is $75.00
plus 6.75% tax. Is $80.00 enough to pay for the service including tax? Justify
your answer. Pleaseeee helppp thank you!!
Answer:
no, it won't be enough because you would need $80.06
Step-by-step explanation:
I just found 6.75% of 75 and added it on
Bill buys a new machine.
The value of the machine depreciates by 20% each year.
Bill wants to work out the value of the machine after 2 years.
By what single decimal number should Bill multiply the value of the machine when new?
Answer:
For a, the machine depreciates 20% of its current value each year. So, It will lose 20% of its value in the first year. Then in the second year, it will lose 20% of THAT value (not of the original value) and so on.
b) Since the machine loses 20% of its value each year, it retains 80% of its value each
Your brother tells you a secret. You see no harm in telling two friends. After this second
"passing" of the secret, 4 people now know the secret (your brother, you and two friends). If
each of these friends now tells two new people, after the third "passing of the secret, eight
people will know. Write an equation to express the "passing" of the secret. If this pattern of
spreading the secret continues, how many people will know the secret after 10 such
"passings"?
Answer:
After n passing, the total number of people knowing the secret [tex]= 2^n[/tex].
After 10 passing, 1024 peoples know the secret.
Step-by-step explanation:
Given that each friend can pass the secret to 2 people.
On 1st pass:
Total number of people knowing the secret = 1+1=2
On 2nd pass:
Total number of people knowing the secret = 1+1+1x2=4
On 3rd pass:
Total number of people knowing the secret = 1+1+2+2x2=8
This can be written as [tex]1+1+2+2^2=1+1+2+2^{3-1}=8[/tex]
Or, [tex]1+S_3=8[/tex], where [tex]S_3=1+2+2^{3-1}[/tex].
So, for the [tex]n^{th}[/tex] pass:
Total number of people knowing the secret = [tex]1+1+2+2^2+\cdots+2^{n-1}=1+S_n, where, S_n = 1+2+2^2+\cdots+2^{n-1}[/tex].
As [tex]S_n[/tex] is the sum of geometric progression of n terms having the first term, [tex]a_1=1[/tex], and the common radio [tex]r=2[/tex].
So, [tex]S_n = \frac{a_1(r^n-1)}{r-1}[/tex]
[tex]\Rightarrow S_n =\frac{1(2^n-1)}{2-1}=2^n-1[/tex].
Hence, after n passing, the total number of people knowing the secret
[tex]=1+S_n = 1+2^n-1=2^n.[/tex]
After, 10 passing, put n=10.
Total number pf peoples know the secret [tex]= 2^{10}=1024.[/tex]
what is the y-intercept of 10x + 5y = 30
Answer: 6
Step-by-step explanation: The y-intercept is 6 and the slope is -2.
First, we subtract 10x.
5y = -10x+30
Then we divide by 5.
y = -2x + 6
Now we have everything we need!
So the y-intercept is 6.
Hope this helps! :)
The y-intercept is "6".
Intercept:Given:
[tex]10x+5y=30[/tex]
y-intercept
[tex]10x+5y=30[/tex] y-intercepts
When y-intercepts the value it indicates that x=0 then
[tex]\to 10x+5y=30\\\\\to 10(0)+5y=30\\\\\to 5y=30\\\\\to y=\frac{30}{5}\\\\\to y=6[/tex]
When the y-intercept is value will be "6".
Find out more information about intercept here:
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i need help to solve please
Answer:
x = 24
Step-by-step explanation:
Here, The Right angled triangle is given
So, The sum of angles of right angled triangle is 180
Now,
2x + 42 + 90 = 180
2x + 132 = 180
2x = 180 - 132
2x = 48
x = 48/2
x = 24
FOR VERIFICATION ONLY:2x + 42 + 90 = 180
2(24) + 42 + 90 = 180
48 + 42 + 90 = 180
180 = 180
Hence, L.H.S = R.H.S
-TheUnknownScientist
How many solution of the system?
y = 2x + 3
3 y = 6 x + 9
Answer:
infinite number of solutions
Step-by-step explanation:
Given the 2 equations
y = 2x + 3 → (1)
3y = 6x + 9 → (2)
Divide the terms in (2) by 3
y = 2x + 3 → (3)
Since the equations are the same in (1) and (3) , then
The system has an infinite number of solutions
A round swimming pool has a diameter of 59 ft, you want to paint the bottom of the pool. If each can of paint can cover 300 ft^2. How many cans do you need to buy?
Answer: You need to buy about 10 cans of paint.
Step-by-step explanation:
Given : Diameter of round swimming pool = 59 ft
Radius = half of diameter
= [tex]\dfrac{59}{2}[/tex] ft
Area of circle = [tex]\pi r^2[/tex] , where r= radius
Area of bottom of pool = [tex]\dfrac{22}{7}\times\dfrac{59}{2}\times\dfrac{59}{2}[/tex]
[tex]=\dfrac{38291}{14}\ ft^2[/tex]
Each can of paint cover 300 ft².
So , Number of cans required to cover 1 ft² = [tex]\dfrac1{300}[/tex]
Number of cans required to cover[tex]\dfrac{38291}{14}\ ft^2[/tex] = [tex]\dfrac{38291}{14}\times\dfrac{1}{300}=9.1169047619\approx10[/tex]
Hence, you need to buy about 10 cans of paint.
find the slope of a line parallel to each given line y = x + 2
Answer:
y = x + 4
Step-by-step explanation:
For a line to be Parallel it has to have the same slope but different y intercept
Answer:
1
Step-by-step explanation:
This equation is written in the
y = mx + b,
where "m" is the slope, and "b" is the y-intercept.
In this case, m=1, hence the "x" has no coefficient; therefore, the slope of the given line is 1.
When 2 lines are parallel, they run next to each other, for infinitely long, yet they never touch. This means that 2 parallel lines have the same slope. Hence a line running parallel to the given one will also have a slope of 1.
Solve: log x = 2 (note: x is a subscript)
Answer:
Wouldn't it be just 2 since it's already solved
Buy 6 mangoes and get 2 free $2.00 per mango (a) Robin purchased $36.00 worth of mangoes. How many free mangoes did Robin get? (b) How many mangoes did he get all together? (c) Peter also bought mangoes. He received 40 mangoes. How much did Peter pay?
Answer:
A.) 6
B.) 24
C.) $60
Step-by-step explanation:
Given that :
Cost of Mango = $2
Purchase of 6 mangoes earns 2 free mangoes
(a) Robin purchased $36.00 worth of mangoes.
How many free mangoes did Robin get?
$36 / price per Mango
$36 / $2 = 18 mangoes
18 / 6 = 3
Hence, free mangoes (3 * 2) = 6 free mangoes
(b) How many mangoes did he get all together?
18 mangoes + 6 mangoes = 24 mangoes
(c) Peter also bought mangoes. He received 40 mangoes. How much did Peter pay?
Set of mangoes purchased:
40/ (6 + 2) = 40/8 = 5 sets of mangoes
Hence, amount paid :
2 * 6 * 5 sets
$60
7
у
2
5
4
10
6
15
What are the input values?
write a equivalent equation for the 2
Steve wants to buy a new car and sees $12,000 car for which the dealership will provide 8% financing because of Steve's poor credit score. Sam has a better credit score and did some research before trying to buy his vehicle, so he was able to get a $16,000 car at 1.5% interest. Assuming the interest is compounded annually, who will pay the more at the end of the 5-year term for these car loans? Support your answer by stating the equation AND answer for BOTH Sam and Steve
5000
Step-by-step explanation:
because u have to add
392,196 divided by 87 (Using long division)
The result of 392,196 divided by 87 is 4,508.
What is long division?Long division is a mathematical process to divide numbers by using multiple steps. This process is applied to big numbers because it facilitates the process of dividing without using a calculator.
What are the steps for long division?Here are the steps you need to follow:
1. Identify the divident and the divisor.
Divident: 392,196
Divisor: 87 (number that divides)
2. Start dividing using one number at a time.
39 / 87 = 0392 / 87 = 4 (87x 4 = 348) - 4 is the first digit of the result392 - 348 = 44 (remainder)441 (next digit is one) / 87 = 5 (87x 5= 435) - 5 is the second digit441-435 = 6 (remainder)69 / 87 = not possible so add a 0, which is the third digit696 / 87 = 8 (87x 8 = 696)696- 696 = 0 (not remainder)Learn more about division in: https://brainly.com/question/369266
I’ll give you a brainliest if you answer the question in the picture
Answer:
1 2/4
Step-by-step explanation:
If two lines are parallel to the same line, then they are parallel to each other. Is there a specific name for this theorem when being used in proofs?
Answer:
For a line:
y = a*x + b
where a is the slope, and b is the y-intercept.
Any other line with the same slope but different y-intercept will be parallel to this line.
Then if we have two lines like:
y1 = a*x + c
and
y2 = a*x + k
Both of them are parallel to our first line, and as you can see, both of them have the same slope and different y-intercept, then these lines are also parallel.
Now, the statement says that:
"If two lines are parallel to the same line..."
Then we can have the lines:
y1 = a*x + k
y2 = a*x + k
Both of them are parallel to our first line (same slope)
Buth these lines are the same line, then these lines are not parallel to each other (a line is not parallel to itself, because it intersects itself in infinity points), then the actual statement should be:
"If two different lines are parallel to the same line, then they are parallel to each other".
Now, this theorem does not have a particular name, just call it as the above statement.
Pls hellppp!! !Reaally
someone help 6th grade math i will mark brainliest
Answer:
B. -2 *4
Step-by-step explanation:
1.factor 12x^2+9
2.factor 25x^2-35
3.factor -x^2 - 2x
4.factor -5x^2+7x
5.factor -14x^2-7x
6.factor 27x^2-9x
How many significant digits are there in 90,100?
Your answer should be:
three significant figures.The three significant figures would be the 9, 0, then 1.
first person to answer get brainliest. 75 × 62 - 58 + 68 - 58
Answer:
4602
Step-by-step explanation:
Answer:75 × 62 - 58 + 68 - 58 = 4602
Step-by-step explanation:
A tow truck company in Houston charges a $40 service call fee and an additional fee of $15 per mile that the vehicle is towed. Write an equation in slope intercept form where c represents the total cost and m, represents the number of miles the vehicle is towed.
Answer:
c=15m+40Step-by-step explanation:
Step one:
given data
charged = $40 call fee
additional charges= $15 per mile
let the number of miles be m
and let the total charges be c
Required, the linear function which represents the total charges
Step two:
the equation for the charges in slope-intercept form is
c=15m+40
helpieeeeeeeeeeeeeeeee plzzzzzzzzzzzz owo Will make brainlist
Answer:
9x^2-3x - 12
Step-by-step explanation:
(9x^2 + 6x - 7) + (-9x -5)
Simplify the expression:
9x^2 - 3x - 12
Factor:
Add and subtract the second term to the expression and factor by grouping.
3( x + 1 ) ( 3x - 4 )
Standard form:
9x^2 - 3x - 12
I hope this helps :)