In a class of 30 students, 13 have a brother and 8 have a sister. There are 3 students who have a brother and a sister. What is the probability that a student who has a sister also has a brother?
Answer 3/8
Answer:
[tex]P(sister) = \frac{8}{30} \\ [/tex]
Step-by-step explanation:
[tex]P(sister) = \frac{8}{30} \\ P(brother) = \frac{13}{30} \\ P(SnB) = \frac{3}{30} \\ [/tex]
This table shows the calories of several sandwiches at a restaurant. Find the mean and mean absolute deviation of this set of data, and then describe what the mean absolute deviation represents.
Sandwich Calories
242 290
290 280
390 350
The mean and mean absolute deviation of this set of data will be 312. 9 and 0.19 respectively. The mean absolute deviation represents the average distance between each data value and the mean.
What is the mean absolute deviation ?The average distance between each data point and the mean is the mean absolute deviation of a dataset. It offers us an indication of how variable a dataset.
Mean = 312. 9
absolute deviation = 0.19
Hence,the mean and mean absolute deviation of this set of data will be 312. 9 and 0.19 respectively. The mean absolute deviation represents. Average distance between each data value and the mean.
To learn more about mean absolute deviation, refer:
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If 3x - 2 = -x + 10, then x =
Answer:
3
Step-by-step explanation:
3x-2= -x+10
4x= 12
x=3
What is the slope of a line that has points (5,-3) and (11,5) ? Remember to simplify.
Answer:
slope= y²-y¹
x²-x¹
= 5--3
11-5
= 5+3
6
= 8
6
= 4/3
or 1.33
Which organism can no longer be found living on Earth?
horse
trilobite
fern
sponge
Answer:
trilobite
Step-by-step explanation:
trilobites are a group of extinct marine arthropods
The path of a flying fish as it made its approach to the surface of the ocean and flew out of the water is represented by the quadratic function h(t) = -t2 + 6t - 5, where t represents the time, in seconds, and h(t) represents the fish's height and depth, in feet. Graph the function using the graphing calculator. To the nearest second, how long was the fish out of the water?
1 second
3 seconds
4 seconds
5 seconds
Answer:
4 seconds
Step-by-step explanation:
fish broke the water's surface in 1 second and went back into the water at 5 seconds
∴ it was out of the water for 4 seconds
Answer:
4
Step-by-step explanation:
Which factored polynomial is shown in the graph?
A) y = (x + 2)(x + 1)(x + 4)
B) y = (x + 2)(x − 1)(x + 4)
C) y = (x + 2)(x − 1)(x − 4)
D) y = (x − 2)(x − 1)(x + 4)
Answer:
B
Step-by-step explanation:
First, we can determine the zeros of the function.
We can see that the graph passes through the x-axis at the points: x = -4, -2, and 1.
Therefore, we have three factors:
[tex](x-(-4)),\, (x-(-2))\text{ and } (x-(1))[/tex]
Thus, our function will be:
[tex]y=(x+4)(x+2)(x-1)[/tex]
Our answer is B.
Find the Distance AB: A=(-2,1) and B=(5,-4)
Answer:
[tex]\sqrt{(5-(-2))^{2} + (-4-1)^2} = \sqrt{(5+2)^2 + (-5)^2} = \sqrt{49+25} = \sqrt{74} \\\\Option: \ d[/tex]
D'jair's vacation starts on July 18th and lasts one week. Kyoko's vacation is from July 18th to July 25th. Whose vacation was longer?
Help with all 4 asap thanks
Answer:
1=122
2=148
3=151
4=114
Step-by-step explanation:
i subtracted the degrees from 180 degrees and got my answer
Virginia had an average rainfall of 24 inches last year. This year it rained 10% more than last year. How many inches of rain fell this year?
Answer:
It rained 26.4 inches this year.
Step-by-step explanation:
10% of 24 is 2.4
24 + 2.4 = 26.4
Answer:
26.4
Step-by-step explanation:
100%=240
10%=2.4
110%=26.4
A model train is 9 centimeters long. The actual engine is 18 meters long. What is the scale of the model? Tracy has a model train set that is 59 centimeters long. How long would the train be in real life?
Answer:
1 cm : 2m
1 cm = 2m
118m
Step-by-step explanation:
A scale drawing is a reduced form in terms of dimensions of an original image / building / object
the scale drawing is usually reduced at a constant dimension
scale of the drawing = original dimensions / dimensions of the scale drawing
18 / 9 = 2 : 1
59 x 2 = 118
So you wanna go shopping and you have 45$ to spend. you see a t shirt you like
for 15$, a pair of new shoes for 20$ and a holiday sweater for 10$, and some pants for 13$. Which two things should you buy to save the most money on your purchase?
Answer:
The holiday sweater and the pants will save the most money with having $22 left.
Step-by-step explanation:
have a good day :)
Solve for x: 5x + 15 = 75
Answer:
x = 12
Step-by-step explanation:
5x + 15 = 75
-15 -15
5x = 60
x = 12
Pleas homework due in 8 minutes plz plz help ASAP
Jacob used a simulation to predict the chance that a canal will flood in 1 of the next 6 years. A number 1 indicates a year in which the canal will flood. Numbers 2, 3, or 4 indicate a year in which the canal will not flood. The results of the simulation are shown. What is the experimental probability that a canal will flood in at least 1 of the next 6 years?
here is the table and the question
Answer:
is there like answer choices or do you just fill it in? if so then i think it would be unlikely.
Step-by-step explanation:
there’s only 7 ones which is the number that shows it will flood so 7/36 is unlikely, it has to be more than half to be likely
1st Place: $10,000 2nd Place: $5,000 3rd Place: $2,500 4th Place: $1,500 5th Place: $1,000 6th - 10th Place: $500 A golf tournament has 100 players and awards prizes to the first 10 places as shown. What is the expected value for a player in the tournament? A) $2.25 B) $22.50 C) $225 D) $2,500
Answer:
c or b
Step-by-step explanation:
Osetion Progress
Homework Progress
a cm
R
Dia
dra
In the diagram shown,
PQRS is a rectangle,
XY is parallel to PS,
RY = 9 cm,
Area of PQRS = 84 cm,
Area of PXYS = 21 cm.
Work out the values of a and b.
You must show all your working.
9 cm
ү
bcm
P
S
Answer:
The answer is below
Step-by-step explanation:
PQRS is a rectangle. The length of rectangle PQRS = 9 cm + b cm = (9 + b)cm
The breadth of PQRS = a. Hence:
Area of PQRS = length * breadth = (9 + b)(a) = 9a + ab
but Area of PQRS = 84 cm²
9a + ab = 84 (1)
In rectangle PXYS, length = QR = a cm, breadth = YS = b cm
Hence area of PXYS = length * breadth = (a)(b) = ab
But Area of PXYS = 21 cm²
ab = 21 (2)
substitute ab = 21 in equation 1:
9a + 21 = 84
9a = 84 - 21
9a = 63
a = 7 cm
ab = 21
7b = 21
b = 3 cm
Therefore a = 7cm, b = 3 cm
can someone solve this
7x+4y=12
x+2y=-4
Answer:9.
Step-by-step explanation:7x -4y =9. 13x = 39. x = 3. 3(3) + 2y = 15. 9 +2y =15. 2y = 6y = 3. check: 7(3)
- 4(3) = 21 - 12 = 9.
Mathh please help and actually do it
Answer:
Parallel
Step-by-step explanation:
they have the same slopes
Answer:
i believe its b sir. brainliest?
Step-by-step explanation:
Which of the following numerical data sets has a mean of 40?
A) 18,82
B) 21, 34, 65
C) 38, 39, 40, 41
D) 20, 30, 40, 55
help!
Answer:
The answer is B) 21, 34, 65
Step-by-step explanation:
21 + 34 + 65 = 120
120 divided by 3 = 40.
In order to find the mean you must add up all of the numbers in the numerical data set, then divide that by how many numbers there are. Hope this helps! :)
The distance from Alison's house to the mailbox is 2/5 mile. The distance from the mailbox to the bus stop is 1/3 mile. What is the total distance from Alison's house to the bus stop? 3/15 11/15 5/6 3/8
Answer:
Option B is correct
Step-by-step explanation:
Given
Distance from Alison's house to the mailbox = [tex]\frac{2}{5}[/tex] miles
Distance from the mailbox to the bus stop [tex]\frac{1}{3}[/tex] miles
The total distance between Alison's house to the bus stop is
[tex]\frac{2}{5} + \frac{1}{3} \\\frac{6+5}{15} \\\frac{11}{15}[/tex]
Hence, option B is correct
10.25 : -0.5 = 0
-20.5
20.5
-0.05
0.05
Answer:
20.5
Step-by-step explanation:
hope it helps you that is all I could do.
Please help
No link!
Answer:
Axis Of Symmtery x=-3 and the vertex is (-3,8)
Step-by-step explanation:
Whats the slope of the line?
Answer:
m = rise/run = 4/5.
Step-by-step explanation:
This line goes throught the "exact" grid intersections (-2, 0) and (3, 4). As we move from the first point to the second, we see that x increases by 5 (this is the 'run') and y increases by 4 (this is the 'rise'). Thus, the slope of this line is m = rise/run = 4/5.
Jaime bakes24 muffins and gives away 3. She also bakes 36 bagels and gives away 4. Writean expression using GROUPING SYMBOLS ILLL GIVE BRAINLY!
Answer:
24-3=21 , 36-4=32 , 3+4=7 , 7 x 5 , which equals 35
Step-by-step explanation:
What’s the value of x
Answer:
x = 2
Step-by-step explanation:
According to the inscribed Angle Theorem, the size of an inscribed angle = ½(measure of the intercepted arc)
m<L = (7x + 9)° is an inscribed angle
m(KM) = 46° is its intercepted arc
Therefore:
7x + 9 = ½(46)
Multiply both sides by 2
2(7x + 9) = 46
14x + 18 = 46
14x + 18 - 18 = 46 - 18
14x = 28
14x/14 = 28/14
x = 2
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HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
Answer:
b 4 Lee's than 3 times Mary's age is 3x-4
Answer:
3x -4
Step-by-step explanation:
we know this because Charlenes age is - 4 than Marys age.
Now, how much is that something? 3x
3x -4
Tracy a teacher is and she's paid a monthly salary of $3,728 calculate her salary per annum
Answer:
$44,736
-
Hourly: $21.51
Daily: $172.06
Weekly: $860
Bi-Weekly: $1,721
Semi-Monthly: $1,864
Monthly: $3,728
Quarterly: $11,184
Annual: $44,736
The graph represents the distance in miles, y: that Car A travels in x minutes. The function y x represents the distance, y; that Car B travels in x minutes. Both cars are moving at a constant rate of speed. Which BEST compares the rates of the two cars? The rate of Car B is 1 of a mile per minute less than the rate of Car A 6 Bi The rate of Car A is of a mile per minute less than the rate of Car B. The rate of car B is 2 of a mile per minute greater than the rate of Car A. Car A and Car Bare traveling at the same rate per minute.
2) Bobby's chess team is made up of 10 boys and 8 girls.
What is the ratio of boys to girls on the chess team? (2 pt)
I believe it would be 10 : 8