what does it mean to say that a number is a perfect square
Answer:
A perfect square is the product of a rational number multiplied by itself.
4, 9, and 16 are perfect squares
1, 2, 3, 5, 6, etc. are not perfect squares
Step-by-step explanation:
Answer:
please mark brainliest!
Step-by-step explanation:
NON-DETAILEDA number that is a perfect square is a number that can be square rooted kind of in a perfect match. Example would be 9 because it can be square rooted by 3 for 3 * 3. Another example that would not be a perfect square would be 30 because it can divided by 6 * 5 but neither one of those numbers are perfect squares.
DETAILEDA number called a perfect square means that the number has an exact squared root. In other words, the number has an squared power, which is exact.
Other way to see this, it's taking natural number 1, 2, 3, 4 then, applying the squared power to each one, the results of each squared power is what we call a perfect square. For example, 1, 4, 9, 16, 25, 36, are all perfect square, because they are the result of a squared power:
[tex]1^{2} = 1\\2^2 = 4\\3^2 = 9\\4^2 = 16\\5^2 = 25\\6^2 = 36[/tex]
Resuelve estas ecuaciones
1. x I 6 = 14
X=
Answer:
3 sjshgegegegehsksksjsjsissjs
An airline makes 200 reservations for a flight who holds 185 passengers. The probability that a passenger arrives for the flight is 0.9 and the passengers are assumed to be independent. Use the normal approximation of Binomial distribution to answer the following questions.
a. Approximate the probability that all the passengers who arrives can be seated.
b. Approximate the probability that there are empty seats.
c. Approximate the number of reservations that the airline should make so that the probability that everyone who arrives can be seated is 0.95.
Answer:
The answer is below
Step-by-step explanation:
given that:
n = sample size = 200, p = probability of a cancelled reservation = 1 - 0.9 = 0.1
The z score is given by:
[tex]z=\frac{x-mean}{standard\ deviation} =\frac{x-np}{\sqrt{np(1-p)} }[/tex]
a) The probability that all the passengers who arrives can be seated can only occur if atleast 15 or more passengers cancelled their reservations.
P(X ≥ 15) = 1 - P(X ≤ 14.5)
[tex]z=\frac{x-np}{\sqrt{np(1-p)} }=\frac{14.5-(200*0.1)}{\sqrt{(200*0.1)(1-0.1)} }=-1.3[/tex]
From the normal distribution table:
P(X ≥ 15) = 1 - P(X ≤ 14.5) = 1 - P(z < -1.3) = 1 - 0.0968 = 0.9
b) The probability that there are empty seat only occur if atleast 16 or more passengers cancelled their reservations.
P(X ≥ 16) = 1 - P(X ≤ 15.5)
[tex]z=\frac{x-np}{\sqrt{np(1-p)} }=\frac{15.5-(200*0.1)}{\sqrt{(200*0.1)(1-0.1)} }=-1.06[/tex]
From the normal distribution table:
P(X ≥ 16) = 1 - P(X ≤ 15.5) = 1 - P(z < -1.06) = 1 - 0.1446 = 0.8554
c)
[tex]0.95=P(X\geq n-185)=1-P(X\leq n-185)\\\\P(X\leq n-185)=1-0.95\\\\P(X\leq n-185)=0.05\\\\0.05=P(Z<\frac{n-185-0.1n}{\sqrt{0.9*0.1*n} } )\\\\0.05 \ correspond\ to \ a\ probability\ of\ -1.64\\\\-1.64=\frac{0.9n-185}{\sqrt{0.9*0.1*n} } \\\\n=198[/tex]
Nita finds that the expression (a + 1) 2 is sometimes, but
not always, greater in value than (a + 1) 3 when she evaluates both expressions
for the same value of a. How do you explain this finding?
I guess the expressions are supposed to be (a + 1)² and (a + 1)³.
Consider the inequality,
(a + 1)² > (a + 1)³
Move everything to one side:
(a + 1)² - (a + 1)³ > 0
Factorize the left side:
(a + 1)² (1 - (a + 1)) > 0
-a (a + 1)² > 0
a (a + 1)² < 0
Notice that the left side is exactly 0 if either a = 0 or a = -1.
Now consider the following 3 cases:
• If a < -1, then a is negative, while (a + 1)² is always non-negative, which means a (a + 1)² will always be negative.
• If -1 < a < 0, then again a is negative, so a (a + 1)² is also negative.
• If a > 0, then a (a + 1)² is always positive.
So the inequality is satisfied for all a in the interval (-∞, -1) ∪ (-1, 0). This is to say that (a + 1)² is always greater than (a + 1)³ if a is chosen from this domain.
Another way to look at this: assume a + 1 falls between -1 and 1. Whenever you scale a number between -1 and 1 by another number in the same range, the product will always be smaller than the original number.
More concretely, let's say a + 1 = 1/2. So for instance, 1/2 * 1/2 = (1/2)² = 1/4, and 1/4 is clearly smaller than 1/2. If we multipy again by 1/2, we get 1/2 * 1/2 * 1/2 = (1/2)³ = 1/8, which is smaller than 1/4.
Help me please .........
Step-by-step explanation:
x ÷ 3 - 7 = -2
x - 7 = -2 × 3
x - 7 = -6
x = -6 + 7
x = 1
Answer:x ÷ 3 - 7 = -2
x - 7 = -2 × 3
x - 7 = -6
x = -6 + 7
x = 1
Step-by-step explanation:
Four out of 32 students in Mr. Lee’s class speak 3 languages. Which decimal represents the number of students who speak 3 languages?
Answer:
.125
Step-by-step explanation:
4 is one-eighth (1/8) of 32, which would be represented by the decimal .125 or 0.125
It has generally been believed that it is not feasible for men and women to be just friends (The New York Times, April 12, 2012). Others argue that this belief may not be true anymore since gone are the days when men worked and women stayed at home and the only way they could get together was for romance. In a recent survey, 186 heterosexual college students were asked if it was feasible for men and women to be just friends. Thirty-two percent of females and 57% of males reported that it was not feasible for men and women to be just friends. Suppose the study consisted of 100 female and 86 male students.
a. Construct a contingency table that shows frequencies for the qualitative variables Gender (men or women) and Feasible (yes or no).
b. Find the probability that a student believes that men and women can be friends.
c. If a student believes that men and women can be friends, what is the probability that this student is a male? Find the corresponding probability that this student is a female.
It has generally been believed that it is not feasible
Answer:
Step-by-step explanation:
See the attached file .
a companys stock was selling at $30a share a month later it was $33 a share what is the percent gain
what is the slope line
Answer:
Slope, sometimes referred to as gradient in mathematics, is a number that measures the steepness and direction of a line, or a section of a line connecting two points, and is usually denoted by m. Generally, a line's steepness is measured by the absolute value of its slope, m.
Step-by-step explanation:
PLEASE HELP ILL GIVE BRAINLIEST!!!
Answer:
[tex]uw = - 4 + 2x = 11 + x - 5 \\ - 4 + 2x = x + 6 \\ 2x - x = 6 + 4 \\ x = 10 \\ \\ uw = - 4 + 2(10) = 16[/tex]
Step-by-step explanation:
ww= - 4 + 2x = 11 + x - 5
- 4 + 2x = x+6
2x - x = 6+4
x=10
ww = -4 +2(10)=16
what fraction multiplied by itself is equal to 4/25
Answer:
2/5
Step-by-step explanation:
we see that 2x2=4
and 5x5is equal to 25
so the answer is 2/5
Answer:
2/5
Step-by-step explanation:
2/5 * 2/5 = 4/25
the number that you can multiply by its self to get 4 is 2 and the number that you can multiply by its self to get 25 is 5
Help I understand but explain the steps and how you got it
Answer:
7-4 = 3
the change is 3 emails
Step-by-step explanation:
Consider a manufacturing process that is producing hypodermic needles that will be used for blood donations. These needles need to have a diameter of 1.65 mm-too big and they would hurt the donor (even more than usual), too small and they would rupture the red blood cells, rendering the donated blood useless. Thus, the manufacturing process would have to be closely monitored to detect any significant departures from the desired diameter. During every shift, quality control personnel take a sample of several needles and measure their diameters. If they discover a problem, they will stop the manufacturing process until it is corrected.
a. Define the parameter of interest in the context of this study and assign an appropriate symbol to it.
b. State the appropriate null and alternative hypotheses using the symbol defined in (a).
c. Describe what a Type I error would be in this study. Also, describe the consequence of such an error in the context of this study.
d. Describe what a Type II error would be in this study. Also, describe the consequence of such an error in the context of this study. tudy. Jesti- g so, h the in.
Answer:
a
True mean diameter[tex][\mu][/tex]
b
The null hypothesis is [tex]H_o : \mu = 1.65 \ mm[/tex]
The alternative hypothesis is [tex]H_a : \mu \ne 1.65[/tex]
c
Gnerally type I error occurs when the null hypothesis is wrongfully rejected
The consequence of this is that the wrongfully rejecting a batch of needles because the company do not find strong evidence that its true mean diameter is 1.65 mm whereas it is
d
Gnerally type II error occurs when the null hypothesis is wrongfully accepted
The consequence of this is that the wrongfully accepting a batch of needles because the company do find strong evidence that its true mean diameter is 1.65 mm whereas it is not
Step-by-step explanation:
Generally from the question we are told that
The needle needs to have a diameter of 1.65 mm
Now statistically the parameter of interest in the context of this study is the true mean diameter of the needle and the symbol is [tex]\mu[/tex]
The null hypothesis is [tex]H_o : \mu = 1.65 \ mm[/tex]
The alternative hypothesis is [tex]H_a : \mu \ne 1.65[/tex]
Gnerally type I error occurs when the null hypothesis is wrongfully rejected
The consequence of this is that the wrongfully rejecting a batch of needles because the company do not find strong evidence that its true mean is 1.65 mm whereas it is
Gnerally type II error occurs when the null hypothesis is wrongfully accepted
The consequence of this is that the wrongfully accepting a batch of needles because the company do find strong evidence that its true mean is 1.65 mm whereas it is not
Solve for x.
16 = -2x - 1
x=-7 1/2
x=-8 1/2
x=8 1/2
x=7 1/2
Answer:
x= -8 1/2
Step-by-step explanation:
Brainliest will be givenFor the numbers 2 to 100, including 2 and
100, determine each ratio.
a) the number of even numbers to the
number of odd numbers
b) the number of multiples of 6 to the
number of multiples of 8
c) the number of prime numbers to the
number of composite numbers
answer: c i believe hope it helps!!! :D
What is it? I’m taking a math test and It for a 100 points so could y’all help me out
Answer:
A.
Step-by-step explanation:
5x100= 500
6x10= 60
7x1= 7
500+60+7= 567
Answer:
The answer is A
Step-by-step explanation:
(5*100)+(6*10)+(7*1)
500+60+7 = 567
The regression equation y = 8.6sin(0.24x – 1.88) + 62.8 models the Fahrenheit temperature in a room x hours after midnight. What is the maximum temperature in the room during the first 24 hours?
Answer:B (57.0 F°)
Step-by-step explanation:
Answer:
71.4 (D)
Step-by-step explanation:
Edge 2020
I took the test, guessed and got it right
Have a great day everyone
-10 - 6(2v – 8) = -82
Answer:
v = 10
Step-by-step explanation:
-10 - 6(2v-8) = -82
-10 - 12v + 48 = -82
-12v + 38 = -82
-12v = -120
v = 10
hope this helped, if you need a more in depth answer to how i did it just ask
Answer:
Hello! I hope I’m correct! :)
Step-by-step explanation:
The answer should be V = 10
First, Add 10 to both sides.
-6(2v-8) = -82+10
Next, Simplify
-6(2v-8) = -72
Than, divide both sides by -6
= -72/-6
{Note: two negatives makes a positive}
= 72/6
Simplify.
2v-8=12
Add (+) 8 to both of the sides.
2v= 12+8
Simplify 12+8 to...
2v = 20
Now, divide both sides by 2
V = 20/2
Since we have 20/2, we need to simplify (divide 20 & 2)
20 divided by 2 = 10
V = 10
Therefore the answer is v = 10Hope this helps! If you have any questions about these steps, feel free to ask! Have a nice day! :)
~by, BrainlyAnime <3
A car travels along a straight road 100 m east then 50 m west. Find distance and displacement of the car.
Given parameters:
First move = 100m east
Second move = 50m west
Unknown:
Distance = ?
Displacement = ?
Solution:
Distance is total path length covered
Displacement is the distance in a specific direction from start to finish.
-----------------------→
100m
←---------
50m
So,
Distance = first move + second move = 100 + 50 = 150m
Displacement = 100 - 50 = 50m due West
Find the quotient of 1008 divided by 18
Answer: 56
Step-by-step explanation: Hopefully this helps!
Answer:
56, I hope this helps
I need help don't know if I did it correctly
Answer:
You have done it incorrectly It's B (2.333...) not C.
What percent is the same as 3/5
?
O A. 30%
B. 35%
OC. 53%
D. 60%
Answer:60%
Step-by-step explanation: I got this right on a test
Order and Operate these please! I will give a lot of points. Please help asap
(x +4) • 9
y + 7 + 8 – 7(x -8)
(4 – 5) + x(6 – 8)
y(4 – 8) – 3y
x + 8y – 16x(1- 3)
82 – x(4 – 8) + √25
53 – 4(y – 7y) - √81
x^2 – 4 – 5y - √36 • √144 + 23(x – 5x)
Answer:
9x+36y-7x+71-2x-1-7y33x+8y4x+6924y+116x² -92x -5y -76Step-by-step explanation:
a) (x +4)·9 = 9x +36
__
b) y +7 +8 -7(x -8) = y +7 +8 -7x +56 = y +15 -7x +56 = y -7x +71
__
c) (4 -5) +x(6 -8) = -1 +x(-2) = -2x -1
__
d) y(4 -8) -3y = y(-4) -3y = -4y -3y = -7y
__
e) x +8y -16x(1 -3) = x +8y -16x(-2) = x +8y +32x = 33x +8y
__
f) 8² -x(4 -8) +√25 = 64 -x(4 -8) +5 = 64 -x(-4) +5 = 64 +4x +5 = 4x +69
__
g) 5³ -4(y -7y) -√81 = 125 -4(y -7y) -9 = 125 -4(-6y) -9 = 125 +24y -9 = 24y +116
__
h) x² -4 -5y -√36·√144 +23(x -5x) = x² -4 -5y -6·12 +23(x -5x)
= x² -4 -5y -6·12 +23(-4x) = x² -4 -5y -72 -92x = x² -92x -5y -76
Covert 52m to kilometers. Explain how you got your answer
Answer:
0.052 kilometers
Step-by-step explanation:
There are .001 kilometers in 1 meter. So to convert meters to kilometers, multiply the number of meters by .001. 52x.001=.052
I hope you understand...have an awesome day!!! C:
If 5 is added to one-half of a number, the result is the same as when three-fifths of the number is decreased by 3. Find the number
Answer:
2.3
Step-by-step explanation:
is your answer
what is the opposite?
Answer:
like a opposite side of a question
Step-by-step explanation:
opposite (of angle)between opposite side of the intersection of two line
Fraser scores 43% in a spelling test. What percentage did he get wrong?
Answer:
100-43= 57
Explanation:
So, Frazer did 57% wrong
Answer:
57% incorrect wow he should have studied better lol ;)
Step-by-step explanation:
If he SCORED 43%, than out of 100% the remaining is 57%
What’s 4.5 rounded to the nearest whole number
Answer: 5
Step-by-step explanation:
When the number after the point is 5 and above round up
4.5 rounded to the nearest whole number is 5.
When you round a decimal number to the nearest whole number, you are determining which whole number it is closest to.
For 4.5, you can visualize it on the number line.
The decimal number 4.5 lies exactly midway between 4 and 5.
To round to the nearest whole number, we look at the digit immediately to the right of the decimal point, which is 5.
Since 5 is greater than or equal to 5 (the midpoint), we round up to the next whole number, which is 5.
Therefore, 4.5 rounded to the nearest whole number is 5.
To learn more on Number system click:
https://brainly.com/question/1763119
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Ryan went to the store to buy some apples. The price per pound of the apples is $4.25 per pound and he has a coupon for $2 off the final amount. With the coupon, how much would Ryan have to pay to buy 5 pounds of apples? Also, write an expression for the cost to buy pp pounds of apples, assuming at least one pound is purchased.
Answer:
x = pp(4.25)-2
Step-by-step explanation:
x is the cost
GIVING BRAINLIEST TO WHOEVER ANSWERS RIGHT 20pts. stuck between first and second option.
Answer:
it would be C ;0
Step-by-step explanation: