Answer:
38
Step-by-step explanation:
Delta math
Solve for 9x-3-8x=7-x
Answer:
5
Step-by-step explanation:
9x - 3 - 8x = 7 - x
9x - 3 - 8x + x = 7
2x - 3 = 7
2x = 10
x = 5
Answer:
hope u understand
Step-by-step explanation:
[tex]\: 1. \: x - 3 = 7 - x \\ \: 2. \: x + x - 3 = 7 \\ 3. \: x + x = 7 + 3 \\ 4. \: 2x = 7 + 3 = 10 \\ 5. \: 10 \div 2 = 5 \\ 6. \: x = 5[/tex]
let me explain you now
1. collect like terms
2. move the variable to the left hand side and change its sign
3. move the constant to the right hand side and change its sign
4. collect like terms and add the numbers
5. divide the answer with 2
6. the solution
In order to study the relationship between playing football and traumatic brain injuries, researchers placed accelerometers in the helmets of many high school football teams. Accelerometers measure the amount of hits that boys playing high school football absorb during a season. Suppose the average number of hits absorbed by a helmet during a season was 355 hits with a standard deviation of 80 hits. What is the probability on a randomly selected team of 48 players that the average number of head hits per player is between 340 and 360 hits
Answer:
56.96% probability on a randomly selected team of 48 players that the average number of head hits per player is between 340 and 360 hits
Step-by-step explanation:
To solve this question, we need to understand the normal probability distribution and the central limit theorem.
Normal probability distribution
When the distribution is normal, we use the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score 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. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For a single player:
[tex]\mu = 355, \sigma = 80[/tex]
For the sample mean(of 48 playes).
[tex]n = 48, s = \frac{80}{\sqrt{48}} = 11.547[/tex]
What is the probability on a randomly selected team of 48 players that the average number of head hits per player is between 340 and 360 hits?
This is the pvalue of Z when X = 360 subtracted by the pvalue of Z when X = 340. So
X = 360
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{360 - 355}{11.547}[/tex]
[tex]Z = 0.43[/tex]
[tex]Z = 0.43[/tex] has a pvalue of 0.6664
X = 340
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{340 - 355}{11.547}[/tex]
[tex]Z = -1.30[/tex]
[tex]Z = -1.30[/tex] has a pvalue of 0.0968
0.6664 - 0.0968 = 0.5696
56.96% probability on a randomly selected team of 48 players that the average number of head hits per player is between 340 and 360 hits
Graph g(x) = 4 cos x
Use 3.14 for pi
Answer:
this is a graph of the question hope this helps
graphing an inequality gives you a visual model of a Solution true or false
Answer:
true ofc
Step-by-step explanation:
Twice the difference between a number, x, and eighteen is three times the number.
Answer:
2(x-18)=3x
Step-by-step explanation:
hope this helps
At a banquet 216 guests sit at 18 tables. Each table has the same number of guests. How many guests per table?
A. 8 guests per table
B. 12 guests per table
C. 18 guests per table
(-1/2)•(-1/2)•(-1/2)
Answer:
[tex]-\frac{1}{8\\}[/tex]
Step-by-step explanation:
Break the equation into 2 pieces:
(-1/2)•(-1/2) = 1/4
1/4 • (-1/2) = -1/8
Answer:
-0.125
Step-by-step explanation:
(a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Enter a number. Round your answer to four decimal places.)
[tex]Here \ is \ the \ missing \ part.[/tex]
[tex]In \ a \ marketing \ survey, \ a \ random \ sample \ of \ 992 \ supermarket \ \ shoppers \ \ revealed[/tex]
[tex]that \ 274 \ always \ stoc k \ up \ on \ a n \ item \ when \ they \ find \ that \ item \ at \ a \ real \ bargain \ price.[/tex]
Answer:
0.2762
Step-by-step explanation:
The point estimate is the best guess of the true parameter. It is an estimate of a population parameter and it is a single value of statistics.
The sample proportion [tex]\hat p[/tex] is the point estimate of the population proportion p
Given that
The sample mean = 274; &
The sample size = 992
Then,
The point estimate [tex]p = \dfrac{x}{n}[/tex]
[tex]p = \dfrac{274}{992}[/tex]
p = 0.2762
Could anyone help answer the question in the photo?
Answer:
[tex]n = -3/10[/tex]
Step-by-step explanation:
Given the expression [tex]\frac{\sqrt[5]{b} }{\sqrt[]{b} }[/tex]
[tex]\frac{\sqrt[5]{b} }{\sqrt[]{b} } \\= \frac{b^{1/5}}{b^{1/2}} \\= b^{1/5-1/2}\\= b ^{2-5/10}\\= b^{-3/10}\\Compare \ b^n \ with \ b^{-3/10}\\\\n = -3/10[/tex]
SOMEONE PLEASE PLEASE HELP!!!!
Answer:
x=16
Step-by-step explanation:
I don't know if this is right! Just a guess! if that is a test, don't use my answer!
In fraction how too solve 2/8=4
Answer:
8/8=16
Step-by-step explanation:
4/2=2
2x8=16
8/8(whole)=16
helppppp
Tony is going to watch a movie in his collection. He has 3 action movies, 11 comedies, and 9 dramas.
He will randomly select one movie. What is the probability that the movie he selects is not a comedy?
Write your answer as a fraction in simplest form.
Answer:
nvm the other guys right
I'm slow
Answer:
12:23
Step-by-step explanation:
3+11+9=23
9+3=12
9+3 is the number of movies which are not comedies
convert 2/3 to it's decimal form and round to the nearest thounsandth
Answer:
0.67
Step-by-step explanation:
2/3=0.666 repeating which rounds up to 0.67
Answer:
0.67
Step-by-step explanation:
QUESTION
Two trillion is how much more than seven hundred fifty billion.
Write the answer in scientific notation.
YOU HAVE SAVED $5000 AND INVESTED IT AT A RATE 3.2% FOR 5 YEARS. WRITE AN EXPONENTIAL FUNCTION TO REPRESENT THIS SITUATION. HOW MUCH WILL VOU KAVE AFTER YEARS? HOW MUCH WILL A BILLIONAIRE HAVE IF HE INVESTS $1,000,000,000 AT THE SAME RATE FOR THE SAME AMOUNT OF TIME?
Answer:
5852.86 = 5000 (1+ .032)^5
1170572956 = 1,000,000,000(1+ .032)^5
Step-by-step explanation:
Graph 1
Graph 2
They are the same
Which graph is increasing at a faster rate?
Which graph has a higher initial value?
Which graph has a higher value at x = 2
Answer:
I think it's Graph 2 in all
Hope this help
3/5 × 35 in simplest form
Answer:
i used desmos calculator
Step-by-step explanation:
3/5 = 0.6
0.6 x 35 = 21
21 is already a simplest mode
u can also used 0.21
Find the percent change to the nearest whole percent. from 45 feet to 95 feet.
Answer:
211%
Step-by-step explanation:
To calculate the percentage change between these two numbers we need to divide the end result from the initial starting point. Once we do this we need to multiply the product by 100 to get the percentage value.
95 / 45 = 2.11111
2.11111 * 100 = 211.11%
Finally, we can see that the percentage change from 45 ft. to 95 ft. is 211.11%. If we round this to the nearest whole percent it would be a change of 211%
Take a look at the score for "Evening Song."
a score for Evening Song in standard music notation, the staff begins with a treble clef, a sharp symbol on the F line and in the C space, and a four over a four; the melody of the song is half note D, quarter note G, quarter note F sharp, half note E, quarter rest, eighth note F sharp, eighth note G, eighth note A, eighth note G, eighth note F sharp, eighth note E, quarter note G, quarter note C sharp, half note D; the solfege for the song is Do Fa Mi Re Mi Fa Sol fa Mi Re Fa Ti Do
Use the steps to sight reading to answer the following questions about the score.
What is the key signature?
What is the time signature?
Which rhythmic note values are used in the score?
Which solfege pitches are used in the score?
Answer: sorry
Step-by-step explanation:
Compare 4 and -2. Which of the following is true?
A. 14<1-2and 4 <-2
B. 141 = 1-2 and 4 >-2
C. 141 <1-21 and 4> -2
D. 41 > 1-2 and 4>-2
Any smart people want to help I stink at math !!
Answer:
I don’t know the answer I just need some points to ask more questions !!! have a good day !!
Step-by-step explanation:
Answer:
Step-by-step explanation:
We know that
The cash cost is $4400.
She pays 10% down
The balance paid in 6
Monthly payment is $676
First , let's find the amount financed:
[tex]A=4400.\frac{90}{100} =3960[/tex]
The number of payments per year (n) are 6.
The time in years is half a year.(6 months)
The installment payment is $676.
The total amount paid is
[tex]676.6=4056[/tex]
Then, we subtract to obtain the finance charge
[tex]4056-3960=96[/tex]
Hence , the answer to (a) is $96, that's the finance charge
b) I need the table for doing that one
PLEASE MARK ME AS BRAINLIEST
what are the cordinates at the center of the circle (x-4)2+(y-5)2=36
Answer:
Here I labeled it
Step-by-step explanation:
Answer: Center: (4,0) Radius: 6
Step-by-step explanation:
Rewrite in standard form to find the center
Determine whether each equation represents a linear or nonlinear function.
Equation Linear Non - linear
y = 2x³ + 1 No Yes
y = 3x Yes No
y = x/5 Yes No
What is a function?A function is a relationship between inputs where each input is related to exactly one output.
Example:
f(x) = 2x + 1
f(1) = 2 + 1 = 3
f(2) = 2 x 2 + 1 = 4 + 1 = 5
The outputs of the functions are 3 and 5
The inputs of the function are 1 and 2.
We have,
y = 2x³ + 1
For x = 1, 2, 3,
y = 2 + 1 = 3
y = 2 x 2³ + 1 = 2 x 8 + 1 = 17
y = 2 x 3³ + 1 = 2 x 27 + 1 = 54 + 1 = 55
The rate of change.
Between 3 and 17 = 17 - 3 = 14
Between 17 and 55= 55 - 17 = 38
This means the equation is not linear.
y = 3x
For x = 1, 2, 3,
y = 3 x 1 = 3
y = 3 x 2 = 6
y = 3 x 3 = 9
The rate of change.
Between 3 and 6 = 6 - 3 = 3
Between 6 and 9 = 9 - 6 = 3
This means the equation is linear.
y = x/5
For x = 1, 2, 3,
y = 1/5
y = 2/5
y = 3/5
The rate of change.
Between 1/5 and 2/5 = 2/5 - 1/5 = 1/5
Between 2/5 and 3/5= 3/5 - 2/5 = 1/5
This means the equation is linear.
Thus,
y = 2x³ + 1 is a linear equation.
y = 3x is not a linear equation.
y = x/5 is a linear equation.
Learn more about functions here:
https://brainly.com/question/28533782
#SPJ1
PLEASE HELP ME !!!!!!!!!!!!!!!!!!!!
Answer:4104
Step-by-step explanation:I think
Which of the points is on a line with positive slope?
A
(-6, 1) and (-6, 9)
B
(2, 6) and (11, -3)
C
5, 0) and (8, 4)
D
(3, 4) and (-2, 12)
What is the area of a rectangle that has a length of 1/4 inch and a width of 1/8 inch?
Answer:
1/4 * 1/8 = 1/32 inch
Step-by-step explanation:
1/4 * 1/8 = 1/32inch
While Tina is shopping, she finds a pair of pants she wants to buy that is priced at $35 but is on sale for 60% off. What expression would you
use to find the total Tina will pay for the pair of pants?
Answer:
35x.40=14
Step-by-step explanation:
you multply $35 by .40 because that is the remaining cost from 60%
Out of 75 students if 8% were absent find the number of present student
Answer:
69 students
Step-by-step explanation:
Step one:
number of students = 75
percentage absebt= 8%
Find the value of 8% absent
=8/100*75
=0.08*75
=6 students
Number present= Total students- number absent
Number present= 75- 6
Number present= 69
Hence there are 69 students present
Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AC = 10
and DC= 7, what is the length of BC in simplest radical form? (Note: the figure is
not drawn to scale.)
Answer:
3
Step-by-step explanation:
Which equation represents a line having a slop of 5/2 and a y intercept of (0,-4)?
Answer:
A
Step-by-step explanation: