Answer:
Step-by-step explanation:
The surface area of a cone is:
● Sa = Pi*r^2 +Pi*r*l
r is the radius and l is the slant heigth
The diameter of this cone is 12 inches so the radius is 6 (12/2=6).
●Sa = Pi*36 +Pi*6*10
●Sa = 301.59 in^2
Answer:
pi (6) * 10+ pi ( 6)^2
Step-by-step explanation:
The surface area of a cone is given by
SA = pi rl +pi r^2 where r is the radius and l is the slant height
We know the diameter is 12 so the radius is 12/2 = 6
SA = pi (6) * 10+ pi ( 6)^2
I don’t know if this is right, I’m stuck. Help!
Answer:
C
Step-by-step explanation:
According to SohCahToa, cosine is adjacent over the hypotenuse.
The adjacent when looking from angle b, is 21.
The hypotenuse of this triangle is 29.
So Cos B=21/29
47:48 The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of system of equations
Answer:
(9, 3)
Step-by-step explanation:
(1) 4(0.25x + 0.5 y) = 3.75 ⟶ x + 2y = 15
(2) 4x - 8y = 12 ⟶ x - 2y = 3
2x = 18
x = 9
9 - 2y = 3
-2y = -6
y = 3
helppppPPPppppPPppppppPppppPPpppPPPPpppPPPpppPppppPPPpPPPpppp please help do not look this up thank you
Answer:
Part A:
The probability of hitting the black circle is the ratio between the area of the black circle and the white square (including the black circle)
Area of circle:
Ac = pi x r^2 = pi x (2/2)^2 = pi (diameter = 2)
Area of square:
As = side^2 = 11^2 = 121 (side = 11)
=> P = pi/121 = ~0.025 (P = 0.025 < 0.5 => P is closer to 0 than 1)
Part B:
The probability of hitting the white portion could be calculated in a similar way as shown in part A. However, the event of hitting the white portion is the complement event of the event of hitting the black circle.
Because P(event) + P(complement of event) = 1
=> P = 1 - 0.025 = 0. 975 (P = 0.975 > 0.5 => P is closer to 1 than 0)
plS I really need this question
Mai is making friendship bracelets. Each bracelet is made from 24.3 cm of string. If she has 170.1 cm of string, how many bracelets can she make? Explain or show your reasoning.
Answer:
❄️The answer is 7.0 or 7❄️
Step-by-step explanation:
It mostly depends on how many zeros will you put in 7.0
It actually doesn’t matter how many zeros you put after the decimal point.
Below I attached a picture of how to solve this kinds of problem.
Hope this helps! ^-^
By:❤️BrainlyMagic❤️
Note:if you ever need help, you can always ask me!
Answer:
It’s 7.0 or 7
Step-by-step explanation:
Trust me I got it right in my homework.
The length of a rectangle is four times its width. If the perimeter of the rectangle is 50 yd, find its area.
Answer:
Area of rectangle is 100 square inches.
Step-by-step explanation:
Area of rectangle = length * width
a=l*w
a=4w*w
a=4w^2............(1)
Put the value of w in (1)
a=4(5)^2
a=4(25)
a=100in^2
Answer:
100 yards
Step-by-step explanation:
the length is 4 times the width of the rectangle, so I used guess and check and figured 20 is four times greater than 5 and plugged those two numbers in and it worked.
One number is 26 more than another. Their product is -169.
Answer:
13 and -13
Step-by-step explanation:
The only factors of 169 are 1, 13, and 169.
Since the product is negative, you have to use 13 and -13. These numbers have a difference to 26. And when multiplied they equals -169
Segments AC and BD are diameters of circle O. Circle O is shown. Line segments A C and B D are diameters. Angle A O D is 73 degrees. What is the measure of Arc A D B? 107° 146° 253° 287°
Answer:
253°
Step-by-step explanation:
The central angle whose rays intercept a diameter of the circle has measure 180 deg.
m<AOD = 73 deg
m<DOB = 180 deg
m<ADB = m<AOD +m<DOB = 73 deg + 180 deg = 253 deg
The measure of an arc of a circle is equal to the measure of the central angle that subtends it.
m(arc)AOD = m<AOD = 253 deg
Answer: 253°
The solution is, the measure of Arc A D B is 253°.
What is an angle?In Plane Geometry, a figure which is formed by two rays or lines that shares a common endpoint is called an angle. The two rays are called the sides of an angle, and the common endpoint is called the vertex.
Here, we have,
given that AC and BD are diameters of circle O.
AC and BD intersect at point C the centre of the circle.
The central angle of a circle is the angle based at the circle's center. In other words, the vertex of the angle must be at the center of the circle. A central angle is formed by two radii that start at the center and intersect the circle itself.
The central angle whose rays intercept a diameter of the circle has measure 180 deg.
m<AOD = 73 deg
m<DOB = 180 deg
m<ADB = m<AOD +m<DOB = 73 deg + 180 deg = 253 deg
The measure of an arc of a circle is equal to the measure of the central angle that subtends it.
m(arc)AOD = m<AOD = 253 deg
Answer: the measure of Arc A D B is 253°.
To learn more on angle click:
brainly.com/question/28451077
#SPJ7
Find the difference of functions at x= - 3, (g - f)(-3), given f(x) and g(x): g(x) = x^2−15, and f(x) =2x
Answer:
0
Step-by-step explanation:
Solution:-
We are given two functions as follows:
[tex]f ( x ) = x^2 - 15\\\\g ( x ) = 2x[/tex]
We need to determine the composite function defined as ( g - f ) ( x ). To determine this function we need to make sure that both function exist for all real positive value of x.
The function f ( x ) is a quadratic function which has real values for all values of x. Similarly, function g ( x ) is a linear line that starts from the origin. Hence, both functions are defined over the domain ( -∞, ∞ )
We will perform arithmetic operation of subtracting function f ( x ) from g ( x ) as follows:
[tex][ g - f ] ( x ) = g ( x ) - f ( x )\\\\\\( g - f ) ( x ) = x^2 - 15 - 2x\\\\[/tex]
Now evaluate the above determined function at x = -3 as follows:
[tex]( g - f ) ( -3 ) = ( -3 )^2 - 2 ( -3 ) - 15\\\\( g - f ) ( -3 ) = 9 + 6 - 15\\\\( g - f ) ( -3 ) = 0[/tex]
3(x+4)-1=-7 plz help
Answer:
x = -6
Step-by-step explanation:
3(x+4)-1=-7
Add 1 to each side
3(x+4)-1+1=-7+1
3(x+4)=-6
Divide by 3
3/3(x+4)=-6/3
x+4 = -2
Subtract 4 from each side
x+4-4 = -2-4
x = -6
Answer:
- 6Step-by-step explanation:
[tex]3(x + 4) - 1 = - 7[/tex]
Distribute 3 through the parentheses
[tex]3x + 12 - 1 = - 7[/tex]
Calculate the difference
[tex]3x + 11 = - 7[/tex]
Move constant to R.H.S and change it's sign
[tex]3x = - 7 - 11[/tex]
Calculate
[tex]3x = - 18[/tex]
Divide both sides of the equation by 3
[tex] \frac{3x}{3} = \frac{ - 18}{3} [/tex]
Calculate
[tex]x = - 6[/tex]
hope this helps
Best regards!!
Thomas lives 350 miles from the beach. He drives to the beach at an average rate of 50 miles per hour. Use that information and the diagram to complete the table below.
Answer:
Step-by-step explanation:
use the equation: y =50x-350 where x is the number of hours driving
hrs
1 50 300
2 100 250
3 150 200
5 250 100
7 350 0
Answer:
1 50 300
2 100 250
3 150 200
5 250 100
7 350 0
Step-by-step explanation:
which of the binomials below is a factor of this trinomial? 8x^2 + 10x-3
Answer:
The factors are (4x-1) and (2x+3)
Step-by-step explanation:
The factors of 8x^2 + 10x -3 can be found by grouping terms
8x^2 - 2x + 12x - 3
2x (4x -1) + 3(4x-1)
(4x-1)(2x+3)
What number is missing in the solution to the system of equations? 4 x minus 3 y = 1. 5 x + 4 y = 9.
Answer:
work is shown and pictured
Answer:
It's Just 1.
Step-by-step explanation:
Check The Guys Work Above.
On a coordinate plane, triangle P Q R has points (3, 0), (1, negative 2), (4, negative 2). Triangle PQR is reflected over the line y = x. What is the coordinate of the image point R’? R’(2, 4) R’(–2, –4) R’(2, –4) R’(–2, 4)
Answer:
R'(- 2, 4 )
Step-by-step explanation:
Under a reflection in the line y = x
a point (x, y ) → (y, x ) , thus
R(4, - 2 ) → R'(- 2, 4 )
Answer:
R'(- 2, 4 )
Step-by-step explanation:
I got it right on edg
For each statement, write the null and alternative hypotheses. State which hypothesis represents the claim. 17. Evaluate the limit, if it exists. Show work. lim→5 2−3−10 2−10
Answer:
Identify what you want to prove and you can test using ANOVA, Chi Square, F test ..... among many.
Step-by-step explanation:
Null and alternative hypothesis are always understood in terms of experiments.
In simple words,
null hypothesis = The results of your experiment are due to chance
alternative hypothesis = The results of your experiments are NOT due to chance
Therefore, identify what you want to prove and you can test using ANOVA, Chi Square, F test ..... among many.
Brainliest for whoever gets this correct! What is the sum of the rational expressions below?
Answer:
second option
Step-by-step explanation:
x / x - 1 + 3x / x + 2
= x(x + 2) / (x - 1)(x + 2) + 3x(x - 1) / (x - 1)(x + 2)
= (x² + 2x) / (x² + x - 2) + (3x² - 3x) / (x² + x - 2)
= (4x² - x) / (x² + x - 2)
Find the value of y.
Answer:
y = √55
Step-by-step explanation:
All the triangles are similar, so the ratio of short side to hypotenuse is the same for all:
5/y = y/(5+6)
y^2 = 55
y = √55
_____
Comment on the geometry
There are three "geometric mean" relationships that apply to this geometry.
the altitude BD is the geometric mean of BC and BA (√30)the long side of the large triangle is the geometric mean of the longer segment of the hypotenuse and the whole hypotenuse (x = √66)the short side of the large triangle is the geometric mean of the shorter segment of the hypotenuse and the whole hypotenuse (y = √55)If you were aware of the last of these relationships, you could write down the answer without any "work."
y = √(5(5 +6)) = √55
__
The geometric mean is the n-th root of the product of n numbers. When there are 2 numbers, it is the square root of their product.
Suppose the results indicate that the null hypothesis should not be rejected; thus, it is possible that a type II error has been committed. Given the type of error made in this situation, what could researchers do to reduce the risk of this error? Choose a 0.01 significance level, instead of a 0.05 significance level. Increase the sample size.
Answer:
Increase the sample size.
Step-by-step explanation:
Increasing the sample size is the best way to reduce the likelihood of a type II error.
The type II error occurs when a hypothesis test accepts a false null hypothesis. That is, it fails to reject the null hypothesis that is false.
In such a situation, to increase the power of the test, you have to increase the sample size used in the test. The sampling size has the ability to detect the differences in a hypothesis test.
We have a bigger chance of capturing the difference if the sample size is larger, and it also increases the power of the test.
which formula would be used to find the measure of angle 1
Answer:
Option (4)
Step-by-step explanation:
By the Angle of intersecting secants,
"If two lines intersect outside a circle, then the measure of the angle between these lines or secants will be one half of the difference between the intercepted arcs."
From the picture attached,
Angle between the secants = ∠1
Measure of intercepted arcs are a° and b°.
By this theorem,
m∠1 = [tex]\frac{1}{2}(a-b)[/tex]
Option (4) will be the answer.
Mariella is 1.58 meters tall. Her daughter is 75 centimeters tall. How much taller is Mariella than her daughter? Write the answer in centimeters.
Answer:
83 cm
Step-by-step explanation:
Change meters to centimeters
1.58 m
1.58 × 100 cm
158 cm
158 cm - 75 cm
= 83 cm
BRAINLIEST ANSWER GIVEN Write a system of equations describing the situation. Do not solve the system. Two numbers add up to 14 and have a difference of 4.
Answer:
[tex]x+y =14\\x-y =4[/tex]
Step-by-step explanation:
[tex]Let -the -unknown- numbers -be ; x -and; y\\x+y =14\\x-y =4[/tex]
I need help! I don’t understand and need helping
Answer:
125
Step-by-step explanation:
30+25+x=180
55+x=180
x=180-55
x=125
Answer:
x = 64.3Step-by-step explanation:
To find x we use tan
tan ∅ = opposite / adjacent
From the question
x is the adjacent
30 is the hypotenuse
So we have
tan 25 = 30/x
x = 30/tan 25
x = 64.33
x = 64.3 to the nearest tenth
Hope this helps you
Type the correct answer in the box. Use numerals instead of words. What is the missing value in the inverse variation given in the table?
Answer:
48
Step-by-step explanation:
If x varies inversely as y, we have:
[tex]x \propto \frac{1}{y} \\\implies x = \frac{k}{y}[/tex]
When x=2, y=96
[tex]2 = \frac{k}{96}\\k=192[/tex]
When x=8, y=24
[tex]8 = \frac{k}{24}\\k=192[/tex]
Therefore, the constant of proportionality, k=192.
The equation connecting x and y is:
[tex]x = \frac{192}{y}[/tex]
When x=4
[tex]4 = \frac{192}{y}\\4y=192\\y=48[/tex]
The missing value in the inverse variation given in the table is 48.
For the functions f(x)=2x−5 and g(x)=3x2−x, find (f∘g)(x) and (g∘f)(x).
Hi,
f°g means : apply first g then f . so calculate "g" and then use result as "x" in f.
g°f means : you apply first f then g
so : f°g = 2(3x²-x) -5 = 6x²-2x- 5
To improve in math, you need practice. have a try with g°f :)
give the answer in comments, and I will tell you if you are correct.
good luck.
please help as soon as possible:)
Answer:
h = 536 ftStep-by-step explanation:
To find the height h we use tan
tan ∅ = opposite / adjacent
From the question
The adjacent is 2000 ft
The opposite is h
So we have
tan 15° = h / 2000
h = 2000 tan 15
h = 535.89 ft
h = 536 ft to the nearest foot
Hope this helps you
Find an equation of the line that passes through the two given points. Use a graphing calculator to verify your result. (-1,0) (4,4)
Answer:
first we find the slope, m=(4-0)/(4+1)
Step-by-step explanation:
first, we find the slope, m=(4-0)/(4+1)=4/5
y-4=4/5 (x-4), y=(4/5)x+4/5
find the number if 7/3 of it is 5 5/6
Answer: [tex]\dfrac{5}{2}.[/tex]
Step-by-step explanation:
To find: The number if [tex]\dfrac{7}{3}[/tex] of it is [tex]5\dfrac{5}{6}[/tex].
Let x be the number.
Then, as per the statement, we have
[tex]\dfrac{7}{3}x=5\dfrac{5}{6}[/tex]
Simplify [tex]5\dfrac{5}{6}[/tex] as [tex]\dfrac{5\times6+5}{6}=\dfrac{35}{6}[/tex]
Then, [tex]\dfrac{7}{3}x=\dfrac{35}{6}[/tex]
Multiply 3 on both sides, we get
[tex]7x=\dfrac{35}{2}[/tex]
Divide both sides by 7, we get
[tex]x=\dfrac{35}{2\times7}\\\\\Rightarrow\ x=\dfrac{5}{2}[/tex]
Hence, the number is [tex]\dfrac{5}{2}.[/tex]
We will see that the mixed number is:
N = 2 + 1/2
How to find the number?
We want to find a number N such that 7/3 times N is equal to 5 + 5/6.
So we just need to solve:
(7/3)*N = (5 + 5/6)
If we multiply both sides by 3/7, we get:
(3/7)*(7/3)*N = (3/7)*(5 + 5/6)
N = 15/7 + 15/42
If we multiply and divide the first fraction by 6, we get:
N = (6/6)*15/7 + 15/42 = 90/42 + 15/42
N = 105/42
Now we can write:
105 = 42 + 42 + 21
Replacing that in the fraction we would get:
N = 105/42 = (42 + 42 + 21)/42 = 42/42 + 42/42 + 21/42 = 2 + 21/42
N = 2 + 1/2
If you want to learn more about mixed numbers, you can read:
https://brainly.com/question/1746829
6/y = 9/24 solve the proportion
Raquel throws darts at a coordinate grid centered at the origin. Her goal is to create a line of darts. Her darts actually hit the coordinate grid at (–5, 0), (1, –3), (4, 5), (–8, –6), (0, 2), and (9, 6). Which equation best approximates the line of best fit of the darts?
Answer:
The line of best fit
y = 0.633x + 0.561
Step-by-step explanation:
The coordinates that the dart hit include
(–5, 0), (1, –3), (4, 5), (–8, –6), (0, 2), and (9, 6)
The x and y coordinates can be written as
x | y
-5|0
1 | -3
4|5
-8|-6
0|2
9|6
So, running the analysis on a spreadsheet application, like excel, the table of parameters is obtained and presented in the first attached image to this solution.
Σxᵢ = sum of all the x variables.
Σyᵢ = sum of all the y variables.
Σxᵢyᵢ = sum of the product of each x variable and its corresponding y variable.
Σxᵢ² = sum of the square of each x variable
Σyᵢ² = sum of the square of each y variable
n = number of variables = 6
The scatter plot and the line of best fit is presented in the second attached image to this solution
Then the regression analysis is then done
Slope; m = [n×Σxᵢyᵢ - (Σxᵢ)×(Σyᵢ)] / [nΣxᵢ² - (∑xi)²]
Intercept b: = [Σyᵢ - m×(Σxᵢ)] / n
Mean of x = (Σxᵢ)/n
Mean of y = (Σyᵢ) / n
Sample correlation coefficient r:
r = [n*Σxᵢyᵢ - (Σxᵢ)(Σyᵢ)] ÷ {√([n*Σxᵢ² - (Σxᵢ)²][n*Σyᵢ² - (Σyᵢ)²])}
And -1 ≤ r ≤ +1
All of these formulas are properly presented in the third attached image to this answer
The table of results; mean of x, mean of y, intercept, slope, regression equation and sample coefficient is presented in the fourth attached image to this answer.
Hope this Helps!!!
Answer:
a. y = 0.6x + 0.6
Step-by-step explanation:
12
Question 3 (5 points)
Write y + 1 = - 2x - 3 in standard form.
15
a) y = -2x-4
18
Ob) 2x + y = -4
ocx + y = – 2
d) -2x-y = 4
Question 4/5 noints)
Answer:
2x + y = -4
Step-by-step explanation:
standard form of equation of straight line is
ax+by = c
that is terms containing x and y should be on LHS and constant term should be on RHS
______________________________________________
Given equation
y + 1 = - 2x - 3
lets bring -2x on LHS ,
add 2x on lHS and RHS
y + 1 + 2x = - 2x - 3 + 2x
=> y + 1 + 2x = -3
on lHS, 1 is there which constant term lets bring it on RHS
subtract 1 from both sides
y + 1 + 2x - 1= -3 -1
y + 2x = -4
rearranging it
2x + y = -4 (Answer)
What is the value of x in the diagram below?
Answer:
7.2option B is the right option.
Step-by-step explanation:
Using leg rule[tex] \frac{bc}{ab} = \frac{ab}{bd} [/tex]
Plug the values:
[tex] \frac{20}{12} = \frac{12}{x} [/tex]
Apply cross product property
[tex]20 \times x = 12 \times 12[/tex]
Calculate the product
[tex]20x = 144[/tex]
divide both sides of the equation by 20
[tex] \frac{20x}{20} = \frac{144}{20} [/tex]
Calculate:
[tex]x = 7.2[/tex]
hope this helps..
Good luck...
this is another type of lazy.... : )
Step-by-step explanation: