Answer:
ask yoir mother okay foolis
A student answered 88% of the questions correct on a test. If the student
answer 22 questions correct, what is the total number of questions on the
test? *
30 questions
O 25 questions
O 27 questions
28 questions
2) Christmas is on its way, so the price of a box of Thornton's chocolates has been increased
by 15%!! A box of Thornton's Continental now costs £17.25. How much did it cost
originally?
A water treatment plant needs to maintain the ph of the water in the
reservoir at a certain level. To monitor this, they take 2 oz. of water at 37
locations every hour, measure the ph at each of those locations, and find
their average. If the ph level of the reservoir is ok, the results at each
location will have varying results, with an average pH of 8.5 and a standard
deviation of 0.22. If the pH level of the reservoir is ok, what is the probability
that the sample average is LESS than 8.40?
0.9971
O 0.3264
• 0.0029
• 0.6736
Using the normal distribution and the central limit theorem, it is found that there is a 0.0029 = 0.29% probability that the sample average is LESS than 8.40.
Normal Probability DistributionIn a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
It measures how many standard deviations the measure is from the mean. After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].In this problem:
The mean is of [tex]\mu = 8.5[/tex].The standard deviation is of [tex]\sigma = 0.22[/tex].A sample of 37 is taken, hence [tex]n = 37, s = \frac{0.22}{\sqrt{37}} = 0.0362[/tex].The probability that the sample average is LESS than 8.40 is the p-value of Z when X = 8.4, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{8.4 - 8.5}{0.0362}[/tex]
[tex]Z = -2.76[/tex]
[tex]Z = -2.76[/tex] has a p-value of 0.0029.
0.0029 = 0.29% probability that the sample average is LESS than 8.40.
To learn more about the normal distribution and the central limit theorem, you can take a look at https://brainly.com/question/24663213
please please please help i am desperate
‼️WILL MARK BRAINLIEST‼️
20 POINTS
1. Find the distance from Alanah's house to Mia's house. Show your work.
2. What is the distance from Mia's house to Teresa's house? Explain how you found this distance.
3. Find the distance from Teresa's house to the arena. Show your work.
4. What is the total distance of Alanah's trip to the arena?
Mia's house is located at point (3, 2) on a coordinate plane. I don't know 2,3,4. :(
Can somebody give me the answer to this problem ill mark you i promise!!
Answer:
half
Step-by-step explanation:
I got this answer by doing (22/7-2/3) and (22/7-2/3)/2 and comparing the results.
(22/7-2/3) = 52/21, which is about 2.47.
(22/7 - 2/3)/2 = 26/21, which is about 1.23.
With this, you can conclude that it would be half the value.
Quadratic Transformations 2 (photo down bellow)
Answer:
The figure below is the graph of this basic function. Graph of y=x^2.
HURRY HELP!!!!!! PLEASE
CALCULATE THE EXACT VALUE OF
3 ⅕ -⅔ divided by 2 ⅘
Answer: 19/21 or 0.90 rounded
Step-by-step explanation
First step: subtract 2/3 from 3 1/5 which equals 2 8/15
Second step is divide 2 8/15 by 2 4/5 which equals 19/21
what's the value of x
Answer:
The letter 'x' is oftenly used in algebra to mean a value that is not yet known . The letter 'x' is known as a variable. Example:- x+3=4 therefore 'x' is the variable .
Maybe this answer might help u out
PLEASE HELPPPP
You need to seed a 4,000 feet area. If an 8 lb bag of seed that costs $10.79 covers 1,200 square feet, how much will the seed cost?
Triangle X has m2A = 30°, mZB = 90°, and m2C = 60° with side lengths of AB = 3, BC = 4, AC = 5.
Triangle Y has m2A = 30°, mZB = 90°, and mZC = 60' with side lengths of AB = 9, BC = 12, AC = 15.
Which statement best describes the relationship between these two triangles?
O They are similar triangles.
O They are similar and congruent triangles.
O They are congruent triangles.
O They are congruent but not similar triangles.
Answer:
O They are similar triangles.
Step-by-step explanation:
Given
Triangle X
[tex]\angle A = 30[/tex]°, [tex]\angle B = 90[/tex]°, [tex]\angle C = 60[/tex]°
[tex]AB = 3,\ BC = 4,\ AC = 5.[/tex]
Triangle Y
[tex]\angle A = 30[/tex]°, [tex]\angle B = 90[/tex]°, [tex]\angle C = 60[/tex]°
[tex]AB = 9,\ BC = 12,\ AC = 15.[/tex]
Required
The relationship between X and Y
From the given parameters, the corresponding angles of both triangles are equal i.e.
A = A, B = B and C = C
However, the side lengths are not equal.
The side lengths of Y is 3 multiplied by the side lengths of X.
This is shown below:
Triangle X
[tex]AB = 3,\ BC = 4,\ AC = 5.[/tex]
Multiply by 2 to get Triangle Y
[tex]AB= 3 * 3 = 9[/tex]
[tex]BC= 4 * 3 = 12[/tex]
[tex]AC = 5 * 3 = 15[/tex]
Since side lengths are not equal, but they have a common ratio of 3, then the triangles are similar.
Do u know who to rea cause I don't T-T
Answer:highlight throw that tomato
Step-by-step explanation:
F(x) = 4x identify the zeros of the function algebraically
Please anyone help me on this
(15 points!!) Valerie is making fruit salad using strawberries and melons. The ratio of strawberries to melons is 3:4. If Valerie makes 14 cups of fruit for a party, how many cups of strawberries does she use?
The ratio shows how many times one value is contained in another value.
The number of cups of strawberries Valerie used is 6 cups.
What is a ratio?The ratio shows how many times one value is contained in another value.
Example:
There are 3 apples and 2 oranges in a basket.
The ratio of apples to oranges is 3:2 or 3/2.
We have,
The ratio of strawberries to melons is 3:4.
Let us consider,
Strawberries = 3x
Melons = 4x
Now,
A total of 14 cups of fruit were made.
This means,
14 = 3x + 4x
14 = 7x
x = 2
Now,
The number of cups of strawberries is 3x.
3x = 3 x 2 = 6 cups
The number of cups of melons is 4x.
4x = 4 x 2 = 8 cups.
We see that,
6 cups + 8 cups = 14 cups.
Thus,
The number of cups of strawberries Valerie used is 6 cups.
Learn more about ratios here:
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#SPJ2
PLEASE HELP ANYONE ASAP????!!!!!
Answer:
g = 11
Step-by-step explanation:
26 = 7g - 63 + 12
26 = 7g - 51
77 = 7g
77/7 = 11
PLEASE ANSWER THIS QUESTION CORRECTLY, I’LL GIVE YOU BRANLIEST!It’d be amazing if you could answer my other math questions if you solve this one, thank you.
Answer:
4, 16
Step-by-step explanation:
[tex] a_n = 3a_{n - 2} - a_{n - 1} - 1 [/tex]
Let's see if it works for a_3:
[tex] a_3 = 3a_{1} - a_{2} - 1 [/tex]
[tex] a_3 = 3(3) - (4) - 1 [/tex]
[tex] a_3 = 4 [/tex]
Yes, it works for a_3.
Now let's calculate a_4.
[tex] a_4 = 3a_{2} - a_{3} - 1 [/tex]
[tex] a_4 = 3(4) - (4) - 1 [/tex]
[tex] a_4 = 7 [/tex]
a_4 is also correct.
Let's calculate a_5.
[tex] a_5 = 3a_{3} - a_{4} - 1 [/tex]
[tex] a_5 = 3(4) - 7 - 1 [/tex]
[tex] a_5 = 4 [/tex]
Let's calculate a_6.
[tex] a_6 = 3a_{4} - a_{5} - 1 [/tex]
[tex] a_6 = 3(7) - 4 - 1 [/tex]
[tex] a_6 = 16 [/tex]
Answer: 4, 16
Explain how to find the surface area of rectangular prisms and cubes. What formulas can you use?
Answer:
surface area of rectangular prisms A=2(wl+hl+hw)
surface area of cubes A=[tex]6a^{2}[/tex]
Step-by-step explanation:
Answer:
The total surface area of a rectangular prism or cube is equal to the sum of the areas of each side.
The area of each side is equal to its length multiplied by its width or A = L x W.
Since the areas of opposite sides are equal, multiple each side area by 2 to obtain the areas of opposite sides.
where:
L = length
W = width
H = height
total area = (2)(L)(W) + (2)(L)(H) + (2)(W)(H)
or simplified:
total area = 2[(L)(W) + (L)(H) + (W)(H)]
Triangle MNO is similar to triangle PRS. Find the measure of side PR. Round your
answer to the nearest tenth if necessary. Figures are not drawn to scale.
Answer:
PR = 34.4
Step-by-step explanation:
x/54 = 7/11
11x = 378
x = 34.4
The paperweight is shaped like a square pyramid. The volume of the pyramid is 48 in. If the area of the base is 36 in?, what is the height of the pyramid?
Given:
Volume of a square base pyramid = 48 cubic inches.
Area of base = 36 sq. inches.
To find:
The height of the pyramid.
Solution:
Volume of a pyramid is
[tex]V=\dfrac{1}{3}Bh[/tex]
Where, B is the base area and h is the height of the pyramid.
Putting V=48 and B=36, we get
[tex]48=\dfrac{1}{3}(36)h[/tex]
[tex]48=12h[/tex]
[tex]\dfrac{48}{12}=h[/tex]
[tex]4=h[/tex]
Therefore, the height of the pyramid is 4 inches.
Are 2x + 5 = 9 and -2x = 4 equivalent to each other
There are not equivalent to each other because the equation 2x+5=9 is equivalent to 2x=4
Answer: no.
Step-by-step explanation: 2x + 5 = 9 so subtract 5 from each side you get 2x = 4
X= 2
If we substitute that back in 2(2) + 5 = 9 so
If you do -2(2) = 4 it’s -4=4 and it’s not equivalent to each other
Because the statement is not correct.
DeAndre’s laptop downloads a 9 GB (gigabyte) file in 15 seconds. It takes Cheryl’s laptop 80 seconds to download a 32 GB file. Whose laptop downloads files at a faster rate?
Answer:
Step-by-step explanation:
9gb/15s=0.6gb/s
32gb/80s=0.4gb/s
DeAndre laptop is faster.
wow his computer is really fast
We have that The laptop that downloads files at a faster rate is Cheryl’s laptop
Y=0.4GB/s
From the question we are told that
9 GB (gigabyte) file in 15 seconds.
Cheryl’s laptop 80 seconds to download a 32 GB file.
Generally the equation for the is mathematically given as
The rate of transfer for DeAndre’s is
X=\frac{9}{15}
X=0.6GB/s
The rate of transfer for Cheryl’s
[tex]Y=\frac{32}{80}\\\\Y=0.4GB/s[/tex]
Therefore
The laptop that downloads files at a faster rate is Cheryl’s laptop
Y=0.4GB/s
For more information on this visit
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Evaluate the expression: 103
Answer: 100+0+3
Step-by-step explanation:
A bicycle wheel has a circumference of 62 inches. Find the diameter of the wheel. If necessary, round to the tenths place. 39.5 inches 19.7 inches 15.5 inches 9.9 inches
Answer:
19.7
Step-by-step explanation:
Answer:
19.7
Step-by-step explanation:
Write the equation of the line that passes through the points (4,5) & (-3, -1)
Answer:
y=6/7x+11/7
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-1-5)/(-3-4)
m=-6/-7
m=6/7
y-y1=m(x-x1)
y-5=6/7(x-4)
y=6/7x-24/7+5
y=6/7x-24/7+35/7
y=6/7x+11/7
what is x in this problem (2x-2)/x-3=5/6
Answer:
x = -3/7
Step-by-step explanation:
(2x-2)/x-3 = 5/6
(2x-2)×6 = 5×(x-3)
12x-12 = 5x-15
12x-5x = -15+12
7x = -3
x = -3/7
Final answer x is equal to -3/7.
Can you please hely me and tell me if my answer is right
Answer:
x = (8√3)/3
Step-by-step explanation:
Reference angle = 30°
Hypotenuse = x
Side length adjacent to reference angle = 4
Apply CAH, thus:
Cos 30 = Adj/Hyp
Cos 30 = 4/x
x × Cos 30 = 4
x = 4/Cos 30
x = 4/(√3/2) (cos 30 = √3/2)
x = 4 × 2/√3
x = 8/√3
Rationalize
x = (8 × √3)/(√3 × √3)
x = (8√3)/3
7-3/7 what is the answer plz help me
Answer:
6.571429, it can also be written as 46/7
Vashti and Stacy measure the width of the gym at their school. It is 17 yards wide.
[Hint: There are 36 inches in 1 yard.]
Part A
column first. Vashti writes the partial
3 by the tens column first.
Stacy is finding the width of the gym, in inches, by adding the partial products of
17 x 36. She finds three of the partial products. Which statement explains
the partial product Stacy is missing?
Which explanation correctly describe
the same or different?
Width of the gym = 42 + 60 + 300+?
Stacy and Vashti's products w
products can be added in any
Stacy is missing the partial product, 21, because she still needs to find
3 ones x 7 ones.
Stacy and Vashti's products we
products have to be multiplied
factors in the wrong order, so s
Vashti.
Stacy is missing the partial product, 210, because she still needs to
find 3 tens x 7 ones.
Stacy is missing the partial product, 600, because she still needs to
find 6 tens x 1 ten
Stacy and Vashti's products wo
products have to be multiplied f
factors in the wrong order, sos!
Stacy
3
5
may someone please help? also I hope everyone has been doing amazing