Answer:
Therefore, the coordinates of the midpoint M are (1, 8).
Step-by-step explanation:
The midpoint formula is:
M = ((x1 + x2)/2, (y1 + y2)/2)
where (x1, y1) and (x2, y2) are the coordinates of the endpoints.
Using this formula, we have:
M = ((1 + 1)/2, (7 + 9)/2) = (1, 8)
Therefore, the coordinates of the midpoint M are (1, 8).
Solve for x.
3-8x = 95-3x
Answer:
x = -18.4
Step-by-step explanation:
3-8x=95-3x
add 3x to both sides
3-5x=95
subtract 3 from both sides
-5x=95-3
-5x=92
divide both sides by -5
x=-18.4
What is the equation, in standard form, of a parabola that contains the following points (-2, 18), (0, 2), (4, 42)?
So the equation of the parabola in standard form is y = (5/4)x^2 - (7/4)x + 2.
One way to approach this problem is to use the standard form of the equation for a parabola, which is y = ax^2 + bx + c. We can set up a system of three equations using the three points given and solve for the coefficients a, b, and c.
Starting with the point (-2, 18):
18 = a(-2)^2 + b(-2) + c
18 = 4a - 2b + c
Using the point (0, 2):
2 = a(0)^2 + b(0) + c
2 = c
Using the point (4, 42):
42 = a(4)^2 + b(4) + c
42 = 16a + 4b + c
Substituting c = 2 into the second equation, we get:
2 = 2
This is always true, so it doesn't provide any additional information.
Substituting c = 2 into the first and third equations, we get:
18 = 4a - 2b + 2
42 = 16a + 4b + 2
Simplifying each equation:
9 = 2a - b
20 = 4a + b
Solving this system of equations, we get:
a = 5/4
b = -7/4
Substituting these values for a and b, and c = 2, into the standard form equation for a parabola, we get:
y = (5/4)x^2 - (7/4)x + 2
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A sphere has a diameter of 10.5 cm. What is the approximate volume
of the sphere? SHOW WORK
A. 115 cm3
B. 455 cm3
C. 463 cm3
D. 606 cm
The approximate volume of the sphere is 606.25 cm³, which is closest to option D. 606 cm³.
To find the approximate volume of a sphere, we'll use the formula:
Volume = (4/3) × π × r³
Given that the sphere has a diameter of 10.5 cm, we can find its radius by dividing the diameter by 2:
Radius (r) = Diameter / 2 = 10.5 cm / 2 = 5.25 cm
Now, we can plug the radius into the volume formula:
Volume = (4/3) × π × (5.25 cm)³
Volume ≈ (4/3) × 3.14 × (144.703125 cm³)
Volume ≈ 4.1867 × 144.703125 cm³
Volume ≈ 606.25 cm³
The approximate volume of the sphere is 606.25 cm³, which is closest to option D. 606 cm³.
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the marketing club at school is opening a student store. they randomly survey 50 students about how much money they spend on lunch each day. what is the expected value for a student to spend on lunch each day? student lunch surveynumber of studentsdollars spent onlunch each day2$101$812$623$58$44$3$2.59$5.11$5.18$9.07
The expected value for a student to spend on lunch each day is $7.09.
To calculate the expected value for a student to spend on lunch each day based on the survey data,
we need to find the average amount spent by each student.
We can calculate the expected value by summing up the products of the number of students and the amount spent on lunch for each category, and then dividing by the total number of students:
Expected value = [tex](2 * 10 + 1 * 8 + 2 * 6 + 3 * 5 + 8 * 4 + 11 * 3 + 10 * 2.59 + 13 * 5.11 + 10 * 5.18 + 10 * 9.07) / 50[/tex]
Expected value = [tex](20 + 8 + 12 + 15 + 32 + 33 + 25.9 + 55.21 + 51.8 + 90.7) / 50[/tex]
Expected value = $354.71 / 50
Expected value ≈ $7.09
Therefore, based on the survey data, the expected value for a student to spend on lunch each day is approximately $7.09.
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Two gears are connected and rotating at the same time. The smaller gear completes 1 3/4 rotations every time the larger gear completes 1/4 of a rotation. How many rotations does the smaller gear complete when the larger gear completes 1 rotation? Drag and drop the correct value into the box.
A. 1/7
B. 7/8
C.5 1/2
D.7
Answer: Which Option do You Drag and Drop into the Box?
Step-by-step explanation:
Let's call the number of rotations of the larger gear "L" and the number of rotations of the smaller gear "S". We know that when the larger gear completes 1 rotation, the smaller gear completes 1 3/4 rotations.
We can set up a proportion to solve for S:
S/1 3/4 = L/1/4
Simplifying the right side of the equation, we get:
S/1 3/4 = 4L
Multiplying both sides by 7/4 to get rid of the fraction on the left side, we get:
S = 28/4 L
Simplifying, we get:
S = 7L
This means that the smaller gear completes 7 rotations every time the larger gear completes 1 rotation.
Therefore, the correct value to drag and drop into the box is 7.
{Hope This Helps! :)}
If 8sintheta = 4+costheta then find the value of tantheta
The value of Tan θ is -5/12
Given that 8 Sin θ = 4 + Cos θ, we need to find Tan θ,
So,
8 Sin θ = 4 + Cos θ
Dividing by Cos θ,
8 Sin θ / Cos θ = (4 + Cos θ) / Cos θ
8 Tan θ = 4 Sec θ + 1
Squaring both sides,
64 Tan² θ = 16 Sec² θ + 1 + 8 Sec θ
64 Tan² θ - 16 Tan θ + 1 = 16 (1 + Sec² θ)
48 Tan² θ - 16 Tan θ - 15 = 0
4 Tan θ(12 Tan θ + 5) -3(Tan θ + 5) = 0
(12 Tan θ + 5) (4 Tan θ - 3) = 0
Tan θ = 3/4 or Tan θ = -5/12
Since Tan θ = 3/4 does not satisfy the equation so Tan θ = -5/12
Hence the value of Tan θ is -5/12
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Which angle is an obtuse angle? (1 point)
Figure A is an angle measuring ninety degrees, Figure B is an angle measuring between zero and eighty nine degrees, Figure C is an angle measuring between ninety one and one hundred seventy nine degrees, Figure D is an angle measuring one hundred eighty degrees.
a
Figure A
b
Figure B
c
Figure C
d
Figure D
who ever answer this first again, will get a brainlist :)
consider a binomial experiment with 2 trials and p 0.4. a. compute the probability of 1 success, f(1). b. compute f(0). c. compute f(2). d. find the probability of at least one success. e. find the expected value, variance, and standard deviation
The expected value is 0.8, variance is 0.48, and standard deviation is 0.693 with the given probability.
a. The probability of getting one success in two trials with p=0.4 is given by the binomial probability formula:
f(1) = 2C1 * (0.4)^1 * (0.6)^1 = 0.48
b. The probability of getting zero successes is:
f(0) = 2C0 * (0.4)^0 * (0.6)^2 = 0.36
c. The probability of getting two successes is:
f(2) = 2C2 * (0.4)^2 * (0.6)^0 = 0.16
d. The probability of at least one success is:
P(at least one success) = 1 - P(no success)
= 1 - f(0)
= 1 - 0.36
= 0.64
e. The expected value of a binomial distribution with n trials and probability of success p is given by:
E(X) = np
In this case, n = 2 and p = 0.4, so:
E(X) = 2 * 0.4 = 0.8
The variance of a binomial distribution is given by:
Var(X) = np(1-p)
So:
Var(X) = 2 * 0.4 * 0.6 = 0.48
The standard deviation is the square root of the variance:
SD(X) = sqrt(Var(X)) = sqrt(0.48) = 0.693.
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A bus is traveling from Miami, Florida to Charlotte, North Carolina. The distance it travels in miles, d, is
related to the rate in miles per hour, r, by the equation d 60t.
What is the average rate of speed for the bus?
1
How far will it travel in 2.5 hours?
T
miles How long will it take to go 330 miles? Round to the nearest tenth.
Answer:
the other day I dey bro you doing today I hope
Im actually dying please explain this ASAP (its a buttload of questions)
The value of x is equal to 0.8603 units.
How to calculate the value of x?In order to determine the adjacent side (value of x), we would apply the law of tangent because the given side lengths represent the opposite side and angles of a right-angled triangle.
tan(θ) = Opp/Adj
Where:
Adj represent the adjacent side of a right-angled triangle.Hyp represent the opposite side of a right-angled triangle.θ represent the angle.Based on the information provided in the image, we can logically deduce the following parameters:
Adj = x units.
Opp = 8.3 units.
By substituting the parameters into the tangent ratio formula, we have the following;
Tan16 = 8.3/x
x = 3tan16
x = 0.8603 units.
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¿Cuál es la masa que tienen 700 ml de un líquido que posee una densidad de 855 kg/m°?
the international nanny association reports that in a random sample of 528 in-home child care providers (nannies), 20 work for either a nationally known, a locally known, or an internationally known celebrity (2011 international nanny association salary and benefits survey). find a 95% confidence interval for the true proportion of all nannies who work for a celebrity.
The 95% confidence interval for the true proportion of all nannies who work for a celebrity is approximately 0.0145 to 0.0613.
The confidence interval:
In this case, we have a random sample of 528 in-home childcare providers (nannies) and we want to estimate the proportion of nannies who work for a celebrity.
To do this, we calculate the sample proportion (p-hat) by dividing the number of nannies working for a celebrity by the total sample size.
Here we have
Sample size (n) = 528
Number of nannies working for a celebrity (x) = 20
First, we calculate the sample proportion (p-hat), which is the proportion of nannies working for a celebrity in the sample:
=> p-hat = x / n = 20 / 528
Next, we calculate the standard error (SE) using the formula:
SE = √(p-hat × (1 - p-hat)) / n)
SE = √((20 / 528) × (1 - 20 / 528) / 528)
Now, we can calculate the margin of error (ME) using the critical value associated with a 95% confidence level.
Since we have a large sample size, we can use the z-value:
z-value for a 95% confidence level ≈ 1.96
ME = z-value × SE
Finally, we can calculate the confidence interval:
Confidence Interval = p-hat ± ME
Substituting the values:
Confidence Interval = [ 20 / 528) ± (1.96×√(20 / 528)×(1 - 20 / 528) / 528) ]
Simplifying:
Confidence Interval ≈ 0.0379 ± 0.0234
Therefore,
The 95% confidence interval for the true proportion of all nannies who work for a celebrity is approximately 0.0145 to 0.0613.
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La escala en un plano de una casa indica que 6 centímetros representan 3 metros. ¿Cuántos centímetros en el plano representan una distancia real de 27 metros?
A real distance of 27 meters will be represented by a distance of 54 centimeters on the plane.
How many centimeters representa real distance of 27 meters?We know that the scale factor of the plane is:
6cm to 3m
Then each meter on the plane will be represented by:
1m = (6cm/3) = 2cm
So each meter in the real world is represented by 2 centimeters on the plane.
Then a real distance of 27 meters will be reprsented by:
27m = 27*(2cm) = 54cm
That distance is represented by 54 centimeters.
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Use the diagram below to classify ABCD. Select all that apply.
Answer please rn
Answer: A and D
Step-by-step explanation: Its obvious.
Answer:
Square
Parallelogram
Step-by-step explanation:
Inner diagonals are all right angles and both diagonals are congruent.
Also, a square must be a parallelogram.
When we subtract a velocity vector from another velocity vector, the result is:
A. an acceleration.
B. another velocity.
C. a scalar.
D. a displacement.
When we subtract a velocity vector from another velocity vector, the result is B. another velocity.
When we subtract a velocity vector from another velocity vector, we are essentially finding the difference between the two velocities. This difference is also a velocity vector, but in a different direction and with a different magnitude. Therefore, the answer is another velocity, option B.
It is important to note that acceleration is a change in velocity, not the result of subtracting one velocity from another. Scalar refers to a quantity with only magnitude, whereas velocity is a vector quantity with both magnitude and direction. Displacement refers to the change in position of an object and is not directly related to subtracting velocity vectors.
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Can you guys help me pleasse
Answer:
c
Step-by-step explanation:
Looking at Jen's slope, we can see that the slope is steeper, but has a higher starting point, meaning that while she can hold more gas, she burns through her gas quicker.
On the other hand, DJ's car starts at a lower point on the graph, meaning their car holds less gas, But has a less steep slope, meaning their car has better mileage.
This means the answer is c: Jen's car holds more gasoline, but DJ's car gets better gas mileage
I NEED HELP PLEASE ASAP
Examining the stem and leaf plot, the number of drivers that travelled below 70 miles per hour is
A. 8
What is stem and leaf plotA stem and leaf plot is a type of data display used in statistics to organize and rank data while retaining individual data points.
It is a visual representation of a frequency distribution of numerical data where each value is split into a stem (usually the leftmost digits) and a leaf usually the rightmost digit).
Using the information we can write out the speed of drivers that drove below 70 miles per hour
54, 56, 59, 62, 62, 63, 64, and 68
This gives 8
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PLS!! HELP!! THIS IS ALSO DUE TOMORROW!!
Question 12 (1 point)
(15.03 LC)
Jimmy wants to draw a 50° angle. Fill in the missing step to make sure his drawing is completed in the correct order: (1 point)
Step 1: He draws a ray.
Step 2: He lines up his protractor with the baseline on the ray and the origin of the protractor on the vertex.
Step 3: He finds 50° on the protractor and draws a mark on the paper.
Step 4: ________
Step 5: He draws arrows on both ends to make them rays.
a
He uses the bottom of the protractor to draw a straight line connecting the arrow with the mark he made.
b
He uses the bottom of the protractor to draw a straight line connecting the mark he made with the arrow on the ray.
c
He uses the bottom of the protractor to draw a straight line connecting the vertex and the arrow on the ray.
d
He uses the bottom of the protractor to draw a straight line connecting the mark he made with the vertex.
Option d) He uses the bottom of the Protractor to draw a Straight line connecting the mark he made with the vertex.
The correct step to complete the drawing of a 50° angle is:
Step 4: He uses the bottom of the protractor to draw a straight line connecting the mark he made with the vertex.
In this step, Jimmy will connect the mark he made at 50° on the protractor with the vertex of the angle using a straight line. This line will complete the angle and ensure that it measures 50°. By connecting the mark with the vertex, Jimmy will have successfully drawn a 50° angle.
After completing Step 4, he can proceed to Step 5, which involves drawing arrows on both ends of the line to indicate that they are rays.
Therefore, the correct answer is option d) He uses the bottom of the protractor to draw a straight line connecting the mark he made with the vertex.
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Find the equation of the line that passes through the points (1, 4) and (-2, 4).
Answer:
[tex]y=4[/tex]
Step-by-step explanation:
you decide to hike up a tall mountain, and you want to know the gradient of the trail you are hiking. the elevation at the mountain's trail head is 645ft, and the elevation at the summit is 6,849ft. the entire trail is 8.2 mi long from beginning to end. what is the gradient of this trail in ft/mi? round to the tenths place.
The gradient of the trail you hiked up is approximately 754.6 ft/mi. This means that for every mile you hiked horizontally, the elevation increased by about 754.6 feet.
The gradient of the trail is essentially the steepness of the trail, or the rate at which the elevation changes per unit of horizontal distance. To find the gradient in ft/mi, we need to calculate the total change in elevation and divide it by the total horizontal distance.
The total change in elevation is the difference between the elevation at the summit and the elevation at the trail head, which is:
6,849 ft - 645 ft = 6,204 ft
The total horizontal distance of the trail is 8.2 mi. To convert the total change in elevation to ft/mi, we divide it by the total horizontal distance
6,204 ft / 8.2 mi = 754.63 ft/mi
Rounding this to the tenths place gives us:
Gradient = 754.6 ft/mi
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Help PLSS! Find the volume of the space inside the right cylinder that is not filled by the right cone using the information given below
The volume of the space inside the cylinder that is not filled with the right cone is 640π m³
What is volume?Volume is the total space occupied by a solid shape.
To calculate the volume of the space inside the cylinder that is not filled with the right cone, we use the formula below.
Formula:
V = πr²h-(πr²h/3)...............................Equation 1Where:
V = Volume of the space not filledh = Height of the cone/Cylinderr = Radius of the base of the cone and the cylinderFrom the question,
Given:
r = /AC/÷2 = 16/2 = 8 m/BD/ = 17 mh = √(BD²-r²) = √(17²-8²) = √225 = 15 mSubstitute these values into equation 1
V = (π×8²×15)-(π×8²×15/3)V = 960π-320πV = 640π m³Hence the right option is A. 640π m².
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Perform the following area application
If 600 bricks measuring 12" by 18" are required to build a wall 10 ft. high (one brick thick), how long is the wall?
_________ft.
The first step is to calculate the total area of 600 bricks.
Area of one brick = 12 inches x 18 inches = 216 square inches
Area of 600 bricks = 600 x 216 = 129,600 square inches
Next, we need to convert the height of the wall from feet to inches since the area of the bricks is in square inches.
10 feet = 120 inches
Now, we can divide the total area of the bricks by the height of the wall to find the length of the wall.
Length of the wall = Area of 600 bricks / Height of the wall
Length of the wall = 129,600 square inches / 120 inches
Length of the wall = 1080 inches
Finally, we can convert the length of the wall back to feet by dividing by 12 since there are 12 inches in a foot.
Length of the wall = 1080 inches / 12 inches/foot
Length of the wall = 90 feet
Therefore, the length of the wall is 90 feet.
To solve this problem, we need to use the formula for calculating area which is length x width. We also need to convert units from feet to inches and vice versa as necessary to ensure we are working with the same units throughout the problem.
The length of the wall is 90 feet.
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If QT is the perpendicular bisector of PR, find each measure.
Please help!!
Given that QT is the perpendicular bisector of PR.The bisector of any line segment divides it into two equal parts, each of which has the same measure.To begin, let's define a few terms.
Angle bisector - An angle bisector is a line or segment that divides an angle into two equal parts.The given figure is shown below: We are given QT is the perpendicular bisector of PR. That means QT is perpendicular to PR and it bisects it. That is, it divides it into two equal halves.Suppose, PR = 2xFrom the given information, we know that the perpendicular bisector QT divides PR into two equal halves.
So,PQ = QR
Now, In right triangle
TPQ,QT² = TP² + PQ²QT² = TP² + QR² (since PQ = QR)QT² = TP² + (2x)² (since PQ = QR = 2x)QT² = TP² + 4x²
Also, In right triangle
TRQ,QT² = TR² + QR²QT² = TR² + (2x)²QT² = TR² + 4x²
We now have two equations:
QT² = TP² + 4x² QT² = TR² + 4x²
The above two equations can be equated:
TP² + 4x² = TR² + 4x²TP² = TR²
Thus, we can say that
TP = TRLet TP = TR = a
By Pythagoras theorem in right angled triangle
TPQ,TP² + PQ² = TQ²a² + (2x)² = QT²a² + 4x² = QT²
The answer is 4x² + a² = QT².
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The distance from building 1 to building 2 is 2,000 feet. The distance between building 2 and building 3 is 5,000 feet. The distance between building 1 and 3 is 1,000 feet. Do the building form a right triangle? Why or why not
Answer:
The angle between building 1 and building 3 at building 2 is not a right angle, and hence, the buildings do not form a right triangle.
Step-by-step explanation:
Gary's car gets about 20 miles per gallon. About how many miles can Gary drive on
9.9 gallons of gas? At $2.90 a gallon, about how much would that amount of
gas cost?
Gary can drive about
miles on 9.9 gallons of gas, which would cost about $.
If Gary's car gets about 20 miles per gallon.
a. Gary can drive about 198 miles on 9.9 gallons of gas.
b. the cost of 9.9 gallons of gas at $2.90 per gallon would be $28.71.
What is the miles?a. Number of miles
Miles = Gallons * Miles per gallon
Miles = 9.9 gallons * 20 miles/gallon
Miles = 198 miles
Therefore Gary can drive about 198 miles on 9.9 gallons of gas.
b. Cost of the gas
Cost = Price per gallon * Gallons
Cost = $2.90/gallon * 9.9 gallons
Cost = $28.71
Therefore the cost of 9.9 gallons of gas at $2.90 per gallon is $28.71.
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Lindiwe is a grade 10 leaner she walks for 3 kilometres from home to school during weekdays
3.1 convert Lindiwes walking distance to metres
(2)It takes Lindiwe’s teacher five minutes to walk to her classroom how long does it take her to walk in seconds
3.3 Lindiwe’s break starts at 10:30 and ends at 11:20 how long is the break ?
it takes Lindiwe's teacher 300 seconds to walk to her classroom and the break is 50 minutes long.
To convert 3 km to meters we multiply by 1000 (since there are 1000 meters in 1 km).
3 km = 3,000 meters
Therefore, Lindiwe walks 3,000 meters from home to school during weekdays.
3.2 To convert 5 minutes to seconds, we multiply by 60 (since there are 60 seconds in 1 minute).
5 minutes = 5 x 60 = 300 seconds
Therefore, it takes Lindiwe's teacher 300 seconds to walk to her classroom.
To find the length of Lindiwe's break, we subtract the start time from the end time:
11:20 - 10:30 = 0:50
The break is 50 minutes long.
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What is the equation of the line that passes through (0,2) and (-3,14) in slope intercept form?
Answer: y = -4x + 2
Step-by-step explanation:
Mr ken has saved $5000. He will withdraw and spend $250 per month. What function can be used to find y, the total amount in ken’s saving account after x number of months?
The required function be y = 5000 - 250x.
Given that,
Amount of saving = $5000
Amount of withdraw and spend = $250
Number of months = x
If the total money in Ken's savings account after x number of months is represented by y,
Then, to calculate the entire amount in his savings account after x number of months, the program deducts 250x from the beginning amount of $5000.
Therefore, The function be,
y = 5000 - 250x
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Find the volume of a hemisphere with a diameter of 18
Answer:
972
Step-by-step explanation:
What multiplies to 71 and adds to 72
