Answer:
The approximate percentage of SAT scores that are less than 865 is 16%.
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
Approximately 68% of the measures are within 1 standard deviation of the mean.
Approximately 95% of the measures are within 2 standard deviations of the mean.
Approximately 99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean of 1060, standard deviation of 195.
Empirical Rule to estimate the approximate percentage of SAT scores that are less than 865.
865 = 1060 - 195
So 865 is one standard deviation below the mean.
Approximately 68% of the measures are within 1 standard deviation of the mean, so approximately 100 - 68 = 32% are more than 1 standard deviation from the mean. The normal distribution is symmetric, which means that approximately 32/2 = 16% are more than 1 standard deviation below the mean and approximately 16% are more than 1 standard deviation above the mean. So
The approximate percentage of SAT scores that are less than 865 is 16%.
(x2 - 4x + 3) + (3x2 – 3x - 5)
2.
(2m – 3+ 7m2) – (3 – 9m2 – 2m)
3.
(3a? – a + 3) + (4a2 – 5)
4.
(2x2 + 3y2 – 22) - (x2 - y2 - z2) + (4x2 – 3y2)
5.
Find the sum of (2x2 - 6x – 2) and (x2 + 4x).
( there are 5 different questions btw)
Answer:
(x - 2) • (4x + 1)
Step-by-step explanation:
Bill put $1000 into a simple interest saving account that earns 6.25% interest. How much will
the account be worth in 5 years?
Answer:
1,800
Step-by-step explanation:
divide 1,000 by 6.25 and we get
160 then we multiply 160 by 5 and we
get 800 so Bill's Bill's bank account will be worth
1,800 in 5 years
A woman buys a pair of shoes at a sale. She pays $45, saving
$15 on the normal price. The percentage discount on the pair of shoes is
Answer:
33.3%
Step-by-step explanation:
What is 50% of 20?.........................
Answer:
10
Step-by-step explanation:
50%, or 1/2 of 20 is 10.
Answer:
10!
Step-by-step explanation:
50% is half, so half of 20 is 10!
i will give you are brainliest if you answer answer question 36 and 37
Answer:
36) A, 396
37) D, 114 km per lit
Step-by-step explanation:
36) 404 - 8 = 396
37) 112 / 8 = 14
You and two friends go to the town carnival. You have a coupon for $20 off that will save your group money! If the total bill to get into the carnival was $70,
how much does one regular price ticket cost? Write the equation.
Solve the equation
Out of some students appeared in an examination,
80% passed in English, 75% passed in Science and
5% failed in both subjects. If 300 of them were
passed in both subjects, how many students were
appeared in the examination? Find it by using a
Venn-diagram
(Ans: 500
Answer:
500 students appeared in the examination.
Step-by-step explanation:
Each event represents a set in the Venn diagram, and we use it to find the desired values.
I am going to say that:
Event A: Passed in English.
Event B: Passed in Science.
80% passed in English
This means that [tex]P(A) = 0.8[/tex].
75% passed in Science
This means that [tex]P(B) = 0.75[/tex]
5% failed in both subjects.
This means that 100% - 5% = 95% passed at least one of these subjects, so [tex]P(A \cup B) = 0.95[/tex].
Proportion that passed both subjects:
This is [tex]P(A \cap B)[/tex]
These percentages are related by the following equation:
[tex]P(A \cap B) = P(A) + P(B) - P(A \cup B)[/tex]
So
[tex]P(A \cap B) = 0.8 + 0.75 - 0.95 = 0.6[/tex]
Number of students in class:
60% of the total number t passed both subjects. This is equals to 300. So
[tex]0.6t = 300[/tex]
[tex]t = \frac{300}{0.6}[/tex]
[tex]t = 500[/tex]
500 students appeared in the examination.
pls solve ii need it
Answer:
multiply each decimal
Step-by-step explanation:
Answer:
1.144
Step-by-step explanation:
multiply 1.1x0.8x1.3
Helppppp I willl give u the brainlest!!!!!
What is the diameter, radius, 2, and circumference?
12 in
d-
pan2
Circumference
Answer:
diameter is 4
Step-by-step explanation:
Fill in the ladder diagram, I added the photo of the diagram.
Answer:
Step-by-step explanation:
2 I 500 500 ÷ 2 = 250
2 I 250 250÷2 = 125
5 I 125 125 ÷ 5 = 25
5 I 25
5 I 5
1
detrmine if 7, 5, 84, 48 are in proportion or not
Answer:
No, the numbers are not in proportionStep-by-step explanation:
The proportion between the first two and the second two numbers are:
7/5 and 84/48Simplifying the second fraction:
84/48 = 7*12/4*12 = 7/4Comparing the fractions:
7/5 ≠ 7/4The answer is no
Help me this is due today!!!!!!!!
Mr. Dyer left a $12.60 tip at a restaurant. This represented 18% of his family’s dinner bill. What was the amount of the family’s dinner bill?
Answer:
$70
Step-by-step explanation:
$12.60 / .18 = $70
I hope this is right, but I am thinking it is since you have to multiply by .18 to get the tip value.
Triangle RST has vertices R(–1, 1), S(3, 1), and T(3, –4). What
are the coordinates of the image of RST after a translation 4 units to the left and 2 units down?
Answer:
R'(-5, -1) S'(-1, -1) T'(-1,-6)
Step-by-step explanation:
because the triangle is moving to the left, you subtract the number of units from the x coordinates of each vertex of the triangle. becasue the triangle is moving down, you subtract the number of units moved down from the y coordinates of each vertex.
Please answer these questions on circumference for BRAINLIEST and extra points if correct!
Answer:
1 a: 1.46
2 a : .73
3 a : 1.54
____
1 b: 9.42
2 b: 2.9
3 b: 16.96
- I hope that helps :)
Step-by-step explanation:
The seat of a bench is in the shape of a trapezoid with bases of 6 feet and 3 feet and a
height of 1.5 feet. What is the area of the seat?
The area of the seat is
ft.
Answer:
6.75 ft^2
Step-by-step explanation:
The area of the seat can be calculated as follows
a + b/2 × h
6+3/2 × 1.5
9/2 × 1.5
4.5× 1.5
= 6.75 ft^2
Hence the area of the seat is 6.75ft^2
PLEASE HELP ME QUICKLY!! The graph shows the number of eggs a farmer collected from each chicken pen one morning. How many more eggs were collected from pen 3 than from pen 2 & 5? (Each egg = 5 eggs)
Answer:
Pen 2 = 5 eggs
Pen 3 = 25 eggs
Pen 5 = 10 eggs
It is asking how many MORE eggs does pen 3 have from BOTH pens 2 and 5. Add 2 and 5. But remember one egg = 5 eggs so as stated in the beginning pen 2 has 1 egg which equals 5 eggs and pen 5 has 2 eggs which equals 10.
5 + 10 is?
15, exactly. So how many more eggs does pen 3 have? 15 + one more egg is 20 and pen 3 has 25 which is more than 20 so let’s add another egg which again equals 5.
Now we have 25 eggs, the exact amount pen 3 has. The answer is 2 more eggs/10 more eggs.
Step-by-step explanation:
Solve for m.
— 5т.
-35
Draw a graph of Andre’s distance as a function of time in this situation.
Answer: it is the variable
Step-by-step explanation:
Martin jogged 45 minutes everyday for 21 days how many minutes did he jog over the 21 days
Answer:
45(21)=945 Minutes
Step-by-step explanation:
You multiply 45 minutes for everyday. Since there is 21 days you multiply by 21. So you do 45(21).
Which of the following relations is a function?
{(-2,0),(-1,0),(0,1),(1,0)}
{(0,-2),(-1,1),(1,-1),(0,1)}
{(-1,-1),(-1,0),(-1,1),(0,-2)}
the measure of an angle is 177.5 what is the measure of its supplementary angle
Answer:
yes yes yes yes yeah yes yes yes yes
Step-by-step explanation:
the. yes gods will take over earth
A rectangular field 50 metres wide and x metres long required 260 metres of fencing
Answer:
x=80
Step-by-step explanation:
im going to assume this is perimeter.
50+50=100
260-100=160
160÷2=80
Answer:
5.2 metres in length I think
Step-by-step explanation:
you didnt exactly put a question, but this seems like a problem where you have to divided the volume by the width to find the length, so 260 divided by 50 is 5.2. I apologize if it is wrong, like I said, there wasn't a question so i was confused.
Triangle A is transformed by the
combined transformation of a rotation
of 180° about the point (-1,0) followed
by a translation with vector
-3
2)
One point on triangle A is invariant
under the combined transformation.
What are the coordinates of this point?
Answer:
( -2.5 , 1 )
Step-by-step explanation:
(-2.5 ,1 ) hope this helps u
help read the instructions first
Answer:
Step-by-step explanation:
Find attached the second one
helllllllp PPPLZZZZZZZZZZ
Answer:
b because the overall problem has a little four witch makes all those numbers in the problem multiplied by 4
Step-by-step explanation:
Derwin used 6 gallons of paint to paint two rooms. He used 4 gallons to paint one of the rooms. The equation g + 4 = 6 can be used to find the number of gallons g he used to paint The other room. How many gallons of paint did Derwin use to paint the other room?
Answer:
He used 2 gallons to paint the other room.
Step-by-step explanation:
g=2
Because 2+4=6
If you subtract 4 from 6 it equals 2.
Hopefully it helps.
Write an equation and solve.
8 less than a number is 24
8 less than a number can be written as
x-8
when you see the word is you should think of = sign
so the equation will be x-8=24
Now solve adding 8 to both sides.
x=24+8
x=32
Answer:
a-8=24
Step-by-step explanation:
Answer is 32. add 8 to other side, making it 32
PLEASEEEEE HWLP 10 points hehehheh
Answer:
just count the blocks inside the blue line
35
Area of the rectangle**
Can someone please help
Answer: 5y^3-7x^5
Step-by-step explanation:
Answer:
to be honest do the liked term method and that is probably going to get u yout answer
work out the value of x
Answer:
Generally, the algebraic expression should be any one of the forms such as addition, subtraction, multiplication and division. To find the value of x, bring the variable to the left side and bring all the remaining values to the right side. Simplify the values to find the result.
I hope it's helpful!
