Answer:
Step-by-step explanation:
This seems complicated, huh.
So think about the question. They want to know the distance from a line, to a point. first decide if the point could possibly be on the line and there is zero distance. The given point is at (-1, 7) our coordinates of the point are at -1 in the X direction and at 7 in the Y direction. If we were to plug in those two number into the given line equation, y = 3x would it be a true statement? no. 7 = 3(-1) is not true. so our given point is not on the line. Next, find the right angle to the line and point. make your own line equation that does have our given point in it. and is at a right angle to the given line. recall that using a reciprocal can give you a right angle to your line. y = (- 1/3)X . Now we just need the given point to plug into our made up line equation and be true. 7 = (-1/3)(-1) + b . we need to make this equation true by moving a number into "b" that makes it true.
b = 6[tex]\frac{2}{3}[/tex] or [tex]\frac{20}{3}[/tex]
7 = (-1/3)(-1) + [tex]\frac{20}{3}[/tex]
now, when does our made up line, y =(-1/3)x + [tex]\frac{20}{3}[/tex], intersect with the given line, y=3x, that is, set the two equal
3x = (-1/3)x + [tex]\frac{20}{3}[/tex]
3[tex]\frac{1}{3}[/tex] X = [tex]\frac{20}{3}[/tex]
[tex]\frac{10}{3}[/tex]X = [tex]\frac{20}{3}[/tex]
X=[tex]\frac{20}{3}[/tex] * [tex]\frac{3}{10}[/tex]
X = [tex]\frac{20}{10}[/tex]
X=2
our two equations intersect at 2, how handy :)
now we have our two points that are at a right angle from each other and we just need the distance from them
(given) A(-1,7) and (found) B(2,6)
Distance = [tex]\sqrt{(x2-x1)^{2} + (y2-y1)^{2} }[/tex]
then our given points are A(x1,y1) and B(x2,y2)
Distance = [tex]\sqrt{(2-(-1))^{2}+(6-7)^{2} }[/tex]
Distance =[tex]\sqrt{3^{2}+(-1)^{2} }[/tex]
Distance = [tex]\sqrt{9+1}[/tex]
Distance = [tex]\sqrt{10}[/tex]
Distance = 3.1622
Distance =3.2 (rounded to nearest 10th)
Yes, that was kinda a lot :/
what is the equation of the line perpendicular to y=2x+5
Answer:
y = 1/2x + 4Step-by-step explanation:
If the line is perpendicular to y = -2x + 5 then the new line has a slope of 1/2.
So solve for b: using y = mx + b
2 = 1/2(-4) + b
2 = -2 + b
4 = b
Put it all together
y = 1/2x + 4
evelyn is trying to pick out an outfit for the first day of school. she can choose from 2 pairs of pants, 2 t-shirts, and 8 pair of shoes. how many different outfits can evelyn make?
There are 32 outfits that Evelyn can make.
This is basic combination.
Evelyn has 2 shirts each shirt can be worn with each of the 2 pair of pants.
So, there are 4 ways to wear them.
she also has 8 pairs of shoes and each pair can be worn with each of the 4 outfits.
total number of outfits that she can make = 8*4
=32 outfits
Evelyn can make 32 different outfits.
To learn more about combinations visit;
https://brainly.com/question/28065038
#SPJ4
A _____________ t-test evaluates data from dependent samples in which the two treatments are applied to the same individual.
A Paired t-test evaluates data from dependent samples in which the two treatments are applied to the same individual.
T-test is a statistical statistics mainly use when population variance is unknown and sample size is small.
In Paired t-test , we compare means of two dependent samples . It gives hypothesis examination on difference between of mean.
It uses same items or people in both sample that's why they are also known as dependent t-test
Paired t-test also increases the statistical power of our analysis.
Formula of paired t-test :
[tex]t = \frac{m}{s/\sqrt{n} }[/tex] with (n-1) degree
where , m is mean difference
s is standard deviation
n is sample size
To know more about Paired t-test here
https://brainly.com/question/28020847
#SPJ4
Carley cycled 72 miles in 3 hours. His cousin Catie drove 132
miles in 2 hours. Assume both cousins were driving at constant
speeds. How much faster was the faster person traveling?
Answer:
Speed at which Carley was cycling at
= 72 miles ÷ 3 hours
= 24 miles/hour
Speed at which Catie was driving at
= 132 miles ÷ 2 hours
= 66 miles/hour
66 miles/hour - 24 miles/hour = 42 miles/hour
∴ The faster person, Catie, was travelling 42 miles/hour faster than Carley, the slower person.
kay scored 15 on quiz 1 which had a mean of 12 and standard deviation 2.4. she scored 14 on the quiz 2 which had a mean of 11 and standard deviation 2.0. in comparison to her classmates, did kay do better on quiz 1 or quiz 2?
In comparison to her classmates, Kay did better in quiz 2.
According to the question,
Kay scored 15 on Quiz 1 which had a mean of 12 and a standard deviation of 2.4
= Z-score = 15 - 12/ 2.4 = 1.25
She scored 14 on Quiz 2 which had a mean of 11 and a standard deviation of 2
= Z-score = 14 - 11/ 2 = 1.5
As we can see the Z-score of Quiz 2 is more than the Z-score of Quiz 1 hence Kay did better in Quiz 2.
To learn more about statistics, mean, median, and mode,
https://brainly.com/question/29342780
#SPJ4
Laura made $342 for 18 hours of work.
At the same rate, how much would she make for 8 hours of work?
PLEASE HELP ASAP!! PLEAZE 20 PIINTS
McKenzie found a correlation coefficient on a set data to be -0.20 which term describes the correlation ?
weak positive
strong negative
strong positive
weak negative
Weak positive term describes the correlation .
What does a weak positive indicate?
Negative correlation does not necessarily indicate a weak correlation between two variables. Although both variables have a tendency to rise in response to one another, a weak positive correlation suggests that the relationship between the two is not very strong.A weak positive graph is what?
Dots are used to indicate values for various numerical variables in a scatter plot, sometimes referred to as a scatter graph or scatter chart. One can see that there is a slight increase in the value of Y as the value of X increases, demonstrating a weak positive correlation.Learn more about weak positive
brainly.com/question/17104826
#SPJ1
Water i draining from a conical tank at the rate of 2 m3
/min. The tank i 16 meter high
and the top radiu i 4 meter. How fat i the water level falling when the water’ level
i 12 meter high?
By using the concept of rate of change, it is obtained that
Water level is falling at the rate of [tex]\frac{2}{9\pi}[/tex] m per minute
What is rate of change?
Suppose there is a function and there are two quantities. If one quantity of a function changes, the rate at which other quantity of the function changes is called rate of change of a function.
Here the concept of rate of change has been used
Let the radius of cone at any point be r m and height be h m
Volume of cone = [tex]\frac{1}{3}\pi\times r^2\times h[/tex]
Now,
By the concept of similarity,
[tex]\frac{r}{h} = \frac{4}{16}\\\\\frac{r}{h} = \frac{1}{4}\\\\r = \frac{1}{4}h[/tex]
Volume of cone (V) =
[tex]\frac{1}{3}\times \pi \times (\frac{1}{4} h)^2\timesh\\\\\frac{1}{48}\times \pi \times h^3\\[/tex]
[tex]\frac{dV}{dt} = \frac{1}{48} \times \pi \times 3h^2\times \frac{dh}{dt}\\\\\frac{dV}{dt} = \frac{1}{16} \times \pi \times h^2\times \frac{dh}{dt}\\\\[/tex]
Now,
[tex]\frac{dV}{dt} = -2,\ h = 12[/tex]
So,
[tex]-2 = \frac{1}{16}\times \pi \times (12)^2 \times \frac{dh}{dt}\\\\\frac{dh}{dt} = -\frac{2 \times 16}{\pi \times 12 \times 12}\\\\\frac{dh}{dt} =- \frac{2}{9\pi}[/tex]
So water level is falling at the rate of [tex]\frac{2}{9\pi}[/tex] m per minute
To learn more about rate of change, refer to the link-
brainly.com/question/24313700
#SPJ4
Gretta has a savings account with $6,500 in it that earns 9.5% simple interest per year. How much interest, to the nearest cent, will Gretta earn in 1 year? Give your answer in dollars.
Answer: $617.50
Step-by-step explanation:
9.5% of 6500 = 9.5*6500/100=9.5*65=617.5
So the interest is $617.5 or $617.50
Hope this helped. If you have any questions or clarifications please ask.
Thanks and please rate!
Answer:
Gretta will earn $617.50 interest
A = $7,117.50
Equation:
A = P(1 + rt)
Step-by-step explanation:
First, converting R percent to r a decimal
r = R/100 = 9.5%/100 = 0.095 per year.
Solving our equation:
A = 6500(1 + (0.095 × 1)) = 7117.5
A = $7,117.50
The total amount accrued, principal plus interest, from simple interest on a principal of $6,500.00 at a rate of 9.5% per year for 1 years is $7,117.50.
helpp this us due by 12 its 11:49 rnn
The values of the segments formed by the median lines in the triangles are;
1. KG = 22
2. [tex]\overline{JE}[/tex] = 19.5
3. FL = 11
9) CI = 4
10) XK = 4
14) x = 3
What is a median of a triangle?A median line of a triangle is a line drawn from a vertex of the triangle to the the middle of the of the opposite side, thereby bisecting the opposite side into two segments of the same length.
The median lines are; [tex]\overline{JE}[/tex], [tex]\overline{KF}[/tex], and [tex]\overline{LD}[/tex]
1. The length of [tex]\overline{GF}[/tex] = 11
The properties of a median line indicates;
[tex]\overline{GF}[/tex] = (1/3)·[tex]\overline{KF}[/tex]
Therefore;
11 = (1/3)·[tex]\overline{KF}[/tex]
[tex]\overline{KF}[/tex] = 3 × 11 = 33
[tex]\overline{KG}[/tex] = (2/3)×[tex]\overline{KF}[/tex]
Therefore;
[tex]\overline{KG}[/tex] = (2/3) × 33 = 22
[tex]\overline{KG}[/tex] = 22
2. [tex]\overline{JG}[/tex] = 13
[tex]\overline{JG}[/tex] = (2/3) × The median line [tex]\overline{JE}[/tex]
Therefore;
[tex]\overline{JG}[/tex] = (2/3) × [tex]\overline{JE}[/tex]
[tex]\overline{JE}[/tex] = (3/2) × [tex]\overline{JG}[/tex]
[tex]\overline{JE}[/tex] = (3/2) × 13 = 19.5
3. JL = 22
[tex]\overline{KF}[/tex] is a median line, therefore, the point F is the midpoint JL
JF = FL
JL = JF + FL by segment addition postulate
JL = FL + FL = 2·FL (substitution property of equality)
JL = 22 = 2·FL
FL = 22 ÷ 2 = 11
9) CS = 6
Where CS is a median line of the triangle ΔABC, then;
CI = (2/3) × CS
CI = (2/3) × 6 = 4
10) UX = 8
Where UX is a median of the triangle ΔTUX, we get;
XK = (1/3) × UK
UX = (2/3) × UK
UK = (3/2) × UX = (3/2) × 8 = 12
XK = (1/3) × 12 = 4XK = 4
14) KL = 7·x + 1
LE = 2·x + 5
The properties of median line indicates that, KL = (2/3)·KE
LE = (1/3)·KE
Therefore;
KL = 2 × LE
7·x + 1 = 2 × (2·x + 5) = 4·x + 10
7·x + 1 = 4·x + 10
7·x - 4·x = 10 - 1 = 9
3·x = 9
x = 9 ÷ 3 = 3
x = 3
Learn more about the median line of a triangle here:
https://brainly.com/question/2971205
#SPJ1
y=-.06(5.5-1)(5.5-10)
Answer:
I don't know if its right.
Ans:1.215
hey not a question but how do you ask questions with a picture on here
Answer:
the one that looks like a paper clip
Step-by-step explanation:
(-8,-4), (-1, -3), and (0, -2).
How do I graph this ?
Answer:
Refer to photo for drawing
Step-by-step explanation:
1. Draw the x y plane
2. Identify -8, -1, 0 on x plane
3. Identify -4, -3, -2 on y plane
4. Mark the intersection point (-8,-4) with x
5. Mark the intersection point (-1,-3) with x
6. Mark the intersection point (0,-2) with x
7. Draw a straight line through the x mark
Can someone please help
Answer:
The measure of angle 1=52
The measure of angle 2=58
The measure of angle 3=31
Step-by-step explanation:
The measure of angle 1 is 52 because the angle out of the triangle is 128. The measure of angle 1 plus 128 equals 180. Using this info you could do 180-128, which equals 52. The measure of angle 1 equals 52.
The measure of angle 2 is 58 because I already know 2 of the values of the triangle, in which Angle 2 is also in. One triangle adds up to 180. The values of the other 2 angles are 52 and 70. Using this information I can use the equation 52+70+x=180, which you then simplify to 122+x=180. X equals 58. The measure of angle 2 equals 58
The measure of angle 3 is 31 because the angle out of the triangle is 70. The missing angle plus 70 equals 180. Using this info I could do 180-70. The missing angle is 110. There is already one given angle, and I have figured out the other, using this info I can now finally find the measure of angle 3. I can find this out by using the equation 110+39+x=180. You would then simplify the equation to 149+x=180. X equals 31. The measure of angle 3 equals 31.
the dimensions of col a and nul a add up to the number of columns in a.
a. true
b. false
Using Rank theorem , the dimensions of col A and Null A add up to the number of colmns in A. It is true statement.
The rank of matrix A denoted as rank(A) is the dimension of the column space Col(A).
The nullity of matrix A written as nullity(A) is the dimension of the null space Nul(A)
Rank Theorem:
If A is a matrix with n columns, then
Rank (A) + nullity (A) = n
In other words we can say that
dim (Col(A) ) in column space + dim (Nul(A)) in empty space = total number of columns in A
The rank theorem is really important theorem.
It is gives a strong relationship between the Null space ( all possible vector x such that Ax = 0) and the column space (the set of vectors b matching Ax=b) explain the two main objectives. The more freedom we have for choosing x, the less freedom we have for choosing b, and vice versa.
To learn more about Rank theorem, refer:
https://brainly.com/question/12914662
#SPJA
A collector of hand-woven rugs has an oval rug that is 42 years old and a circular rug that is 14 years old. How many years ago was the oval rug five times as old as the circular rug was then?
i need an equation plsss help.
Answer:
7
Step-by-step explanation:
Please someone help me with the answers I need help
Answer:
x+6, y+2
Step-by-step explanation:
x goes left and right, y goes up and down. the little ' means that is the line after translation, so w and y are the originals, and w' and y' are after the translation. Add 6 to x(left and right) (negative sign means left and positive sign or no sign means right), so go 6 to the right, and add 2 to y, so go up two (negative sign means to go down, and positive or no sign means to go up)
527.8317 Find the digits in the tens place, in the hundredths place, and in the thousandths place for the following number.
Given the equation y=2-(x-3)^2
Find the cordinates of the vertex of the curve it describes
Find the x intercept
Find the y intercept
Answer:
Y= -7
X= 4.4
Step-by-step explanation:
Y= 2 - ( x-3)^2
When x= 0
Y= 2- ( 0-3)^2
Y will equals -7
When y = 0
(x-3)= √2
X = 4.4
Gwen measured a kitchen and made a scale drawing. The scale she used was
11 inches : 5 feet. If a countertop in the kitchen is 22 inches long in the drawing, how long is
the actual counter?
As per the given ratio, the length of the actual counter is 120 feet.
Ratio:
Basically, the ratio refers an ordered pair of numbers a and b, written a / b where b does not equal 0. And a proportion is an equation in which two ratios are set equal to each other.
Given,
Gwen measured a kitchen and made a scale drawing. The scale she used was 11 inches : 5 feet.
Here we need to find the length of the actual counter if a countertop in the kitchen is 22 inches long in the drawing.
While looking into the given question, we have identified the following things,
Scale drawing ratio = 11 inches : 5 feet
And the length of the drawing = 22 inches.
When we convert the inches into feet,
Then we get,
=> 11 inches = 11/12 feet.
So the actual length can be calculated as,
=>22 : 11/12 : 5
=> 22 x 12/11 x 5
=> 2 x 12 x 5
=> 120
Therefore, the length of the actual counter is 120 feet.
To know more about Ratio here.
https://brainly.com/question/13419413
#SPJ1
A company claims that the mean weight per apple they ship is 120 grams with a standard deviation of 12 grams. Data generated from a sample of 49 apples randomly selected from a shipment indicated a mean weight of 122. 5 grams per apple. Calculate and interpret a 95% confidence interval for the mean weight per apple.
The 95% confidence interval for the average apple weight is (119.14, 125.86).
An apple typically weighs 120 grams with a 12-gram standard deviation, according to one manufacturer. The average weight of an apple was 122. 5 grams, according to statistics created from a sample of 49 apples that were randomly chosen from a shipment.
Let, n = 49
x = 122.5
σ = 12
To calculate and interpret a 95% confidence interval for the average apple weight, use the formula;
⇒ (x ± 1.96*σ/√n)
⇒ (122.5 ± 1.96*12/√49)
⇒ (119.14, 125.86)
Consequently, the average apple weight has a 95% confidence interval of (119.14, 125.86).
To learn more about Confidence interval click here:
brainly.com/question/24131141
#SPJ4
If a rectangle
has a width of 3w² and a
length of 2w5, write an expression to
represent the area of the rectangle.
The expression to represent the area of the rectangle is A = 6w⁷
Area of the rectangle:The rectangle is a four-sided polygon with an internal angle of 90° at the corner of every side. The opposite sides of the rectangle are equal.
The formula for the area of the rectangle is given below
Area = Length × width
Here we have
Width of the rectangle = 3w² and
Length of the rectangle = 2w⁵
As we know the area of the rectangle = Length × width
Area of the rectangle, A = 3w² × 2w⁵
=> A = 6w²×w⁵
=> A = 6w²⁺⁵
=> A = 6w⁷
Therefore,
The expression to represent the area of the rectangle is A = 6 w⁷
Learn more about the Rectangle at
https://brainly.com/question/2182040
#SPJ1
find the exact values of sin 2u, cos 2u, and tan 2u using double-angle formulas.
13.) sin u=3/5, 0 < u < pi/2
15.) tan u= 1/2, pi < u < 3pi/2
The exact values are sin2u=36/25, cos2u=-3.142 and tan2u=sin2u/cos2u
What is Trigonometry?Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.
Given,
sin u=3/5, 0 < u < pi/2
tan u= 1/2, pi < u < 3pi/2
We need to find sin 2u, cos 2u, and tan 2u
sin2u=2sinucosu
tanu=sinu/cosu
1/2=3/5/cosu
cosu=3/5×2
cosu=6/5
So sin2u=2(3/5)(6/5)
sin2u=36/25
cos2u=1-2sin²u
=1-2(36/25)²
=1-2(1296/625)
=1-4.14
=-3.142
cos2u=-3.142
tan2u=sin2u/cos2u
Substitute the values of sin2u and cos2u
sin2u=36/25/(-3.142)
=1.44/-3.142
=-0.458
Hence, the exact values are sin2u=36/25, cos2u=-3.142 and tan2u=sin2u/cos2u
To learn more on trigonometry click:
https://brainly.com/question/25122835
#SPJ1
the points (7, 18) and (3, 14) fall on a particular line. What is its equation in slope-intercept form?
[tex](\stackrel{x_1}{7}~,~\stackrel{y_1}{18})\qquad (\stackrel{x_2}{3}~,~\stackrel{y_2}{14}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{14}-\stackrel{y1}{18}}}{\underset{run} {\underset{x_2}{3}-\underset{x_1}{7}}} \implies \cfrac{ -4 }{ -4 } \implies 1[/tex]
[tex]\begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{18}=\stackrel{m}{ 1}(x-\stackrel{x_1}{7}) \\\\\\ y-18=x-7\implies {\Large \begin{array}{llll} y=x+11 \end{array}}[/tex]
Over the set of real numbers, what is the domain of the composite function
G(F(x))?
F(x) = -x-3, G(v) = √y
G(F(x)) = √√-3-x
OA. x>-3
OB. xs-3
C. x2-3
O D. All real numbers
The domain of the composite function is - x - 3 ≥ 0 , x ≤ -3 .
The correct answer is (B).
Given,
In the question:
Over the set of real numbers.
F(x) = -x-3, G(v) = √y
G(F(x)) = √√-3-x
To find the domain of the composite function.
Now, According to the question:
Based on the given conditions:
The domain of F(x) = -x -3 is all real numbers.
The domain of
G(v) = √y is y ≥ 0
{The relationship of the domain of a composite function and the original functions}
So, - x - 3 ≥ 0 , x ≤ -3
Hence, The domain of the composite function is - x - 3 ≥ 0 , x ≤ -3 .
The correct answer is (B).
Learn more about Function at:
https://brainly.com/question/13461298
#SPJ1
Sparx homework
I really need help on how to solve this!
Answer:
a] 5 dogs
b] 16 dogs
Step-by-step explanation:
The minimum number of dogs that could have a mass of more than 26 kg is 5. This is because dogs with a mass of 30 ≤ x ≤ 40 have a frequency of 5. The dogs in the 20 ≤ x ≤ 30 range could be more than 26 kg, but they could also be less than 26 kg, so these are not included in the minimum.
The maximum number of dogs that could have a mass of 26 kg is 16 because both dogs in the 30 ≤ x ≤ 40 range (5) and 20 ≤ x ≤ 30 range (11) could weigh more than 26 kg. 11 + 5 = 16, giving us our answer for the maximum.
Determine if they given ordered pair is a solution to the given system
Answer:
Step-by-step explanation:To determine if an ordered pair is a solution to a system of two equations, we substitute the values of the variables into each equation. If the ordered pair makes both equations true, it is a solution to the system.
Fatima paid for 5 pallets of grass to be delivered. Each pallet of grass cost $129. 95. Fatima paid $76. 20 for delivery. What is the total amount fatima paid?.
Fatima paid $129.95 for pallet of grass cost and $ 76.20 for delivery. The total amount Fatima paid is $725.95.
Pallet Grass Cost: The quality and type of grass you want will impact the overall cost of sod. Most homeowners pay between $150 and $450 per pallet of sod for their yards or an average of $300. When it comes to square footage, sod costs between $0.35 and $0.85, or an average of $0.60 per square foot.
Given in the question:
Number of Pallets = 5
Cost of each pallet = $129.95
Total amount spend on Pallets
= Number of Pallets × Cost of each pallet
= 5 × $129.95 = $ 649.75
Also given;
Amount spend on Delivery = $76.20
Total Amount Paid by Fatima
= Total amount spend on Pallets + Amount spend on Delivery
= $649.75 + $76.20
= $ 725.95
Hence Fatima paid a total amount of $725.95.
Learn more about Total amount:
https://brainly.com/question/11807738
#SPJ4
What is a confidence interval? Choose the best description.
A range of probabilities, constructed with a sample, that describes where a population parameter will occur.
A range of values, created using a sample, within a population parameter that has a certain probability of occurring.
A range of values used to estimate where the sample statistic is likely to occur
Answer: A range of values, created using sample, within which population parameter has a certain probability of occurring.
Reason: E.g. P(a<x>b) = 0.95
confidence interval is A range of values, is created using a sample, within a population parameter that has a certain probability of occurring.
A sampling method's degree of certainty or uncertainty is measured by confidence intervals. In statistics, the probability that a population parameter will fall between a set of values for a certain percentage of the time is referred to as a confidence interval. Confidence intervals that contain either 95% or 99% of expected observations are frequently utilized by analysts. To comprehend the statistical significance of their estimates, inferences, or predictions, statisticians and other analysts employ confidence intervals.
Know more about Confidence intervals here: https://brainly.com/question/24131141
#SPJ4