Choose the correct simplification of the following:
(2x^2 + x - 1) - (x^2 + 3x – 5)
Answers
Answer:
x^2 - 2x + 4
Step-by-step explanation:
Related Questions
The average weight of ten bulls is 500kg and the standard deviation of the weight is 30kg. What would be the weight of a bull that is 6 standard deviations above the mean weight
Answers
Answer:
680kg
Step-by-step explanation:
The average weight of ten bulls is 500kg and the standard deviation of the weight is 30kg. What would be the weight of a bull that is 6 standard deviations above the mean weight
The formula to solve for the weight that is 6 standard deviation above the mean weight =
μ + 6σ = w
Where
μ = Mean weight = 500kg
σ = Standard deviation = 30kg
Hence:
w = 500kg + 6(30kg)
w = 500kg + 180kg
w = 680kg
Therefore, the weight of a bull that is 6 standard deviations above the mean weight is 680 kg
Using the normal distribution, it is found that the weight of a bull that is 6 standard deviations above the mean weight is of 680 kg.
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.In this problem, the mean and the standard deviation are, respectively, of [tex]\mu = 500[/tex] and of [tex]\sigma = 30[/tex].
The weight of a bull that is 6 standard deviations above the mean weight is X when Z = 6, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]6 = \frac{X - 500}{30}[/tex]
[tex]X - 500 = 6 \times 30[/tex]
[tex]X = 680[/tex]
The weight of a bull that is 6 standard deviations above the mean weight is of 680 kg.
More can be learned about the normal distribution at https://brainly.com/question/24663213
8n+16.2=1.6
Plzzz
Help ,
Answers
Answer:
8n+16.2=1.6
n=-1.825
Step-by-step explanation: Subtract 16.2 from both sides 8n+16.2-16.2=1.6-16.2
Simplify 8n=-14.6/8
n=-1.825
Answer:
-1.825
Step-by-step explanation:
8n + 16.2 = 1.6
(step1)
8n + 16.2 = 1.6
- 16.2 -16.2
8n = -14.6
(step2)
8n = -14.6
---- ------
8 8
(step3)
-1.825
1. subtract 16.2 from both sides, you have to get rid of the number that is being add/subtracted to get the n and result alone
2. divide by the number next to the variable since you have to get the variable alone in order to find out what it is. you divide because you have to do the opposite of what the variable IS doing.
3. get the result lol
Evaluate: 25 - 2t, when t = 5
Answers
Answer:
15
Step-by-step explanation:
25 - 2t
t = 5
25 - 2(5)
25 - 10
= 15
Answer:
15
Step-by-step explanation:
The equation with the value t substituted for 5 will look like 25 - (2)5
first you multiply 2 and 5 because pemdas.
The equation Is now 25-10
25-10 is 15
The answer is 15
In a triangle, the measure of the first angle is five times the
measure of the second angle. The measure of the third angle
is 40 less than five times the measure of the second angle.
What is the measure, in degrees, of each angle?
Answers
Add the 3 angles.
The sum is 180 degrees.
the height of the lighthouse is 36.5 m. find the distance of the ship from the lighthouse if it is visible from the ship at an angle of 1 °.
Answers
Answer:
I don't get it send a pic of the question Please I will see if I can help
Calculate the approximate difference between 1 mile and 2 km.
Give your answer in metres.
Answers
Answer:
Approximate difference between 1 mile and 2 km in meters = 390.66meters
Step-by-step explanation:
I mile =1609.34meters
also 1000m = 1km
therefore 2km = 2 x 1000= 2000m
Approximate difference = 2000m - 1609.34m
=390.66 meters.
Approximate difference between 1 mile and 2 km in meters = 390.66meters
For the question, calculate the slope of a line that passes through the points given. Remember to reduce all fractions to lowest terms.
(-14, 18), (-16, 14)
Answers
Answer:
the answer is 2 or 2/1 hope this helps
Answer:
In fraction form, the slope is 2/1.
Or, the slope is just 2.
Step-by-step explanation:
Using the equation:
m =
y2 - y1 /
x2 - x1
Plug in the x and y points and solve.
note: m = slope in slope intercept form, y - mx + b
y2 = 14 y1 = 18
x2 = -16 x1 = -14
14 - 18 / -16 -(-14)
-4 / -2
Simplified: -2 / -1
In fraction form, the slope is -2 / -1, or 2/1 because either way works.
Or, the slope is just 2.
Hope this helps! If you have any additional questions, please don't hesitate to ask me or your teacher to be sure you master the subject. Stay safe, and please mark brainliest! :)
HELP ME CHEAT
A small pouch contains 8 black marbles, 5 white marbles, and 12 red marbles.
Find the probability of picking a red then a black marble if you do not replace the first marble.
0.16
0.32
0.3
0.5
Answers
Which fractions have a least common denominator of 12? 1 A.2 and 3 2 B. 1 5 and 2 6 1 C. 5 and 9 5 1 D.2 and 3 4
Answers
The answer is b. 15
in the first third of the season the team played 18 games how many games will the team play during the whole season
Answers
Answer:
54
Step-by-step explanation:
all you have to do is times 18 by 3
Ethan needs an 75% average in his writing class to pass. On his first 4 exams,
he earned scores of 68%,72%, 85%, and 90%. What is the minimum score
Ethan can earn on his fifth and final test to pass?
A. 80%
B. 70%
C. 68%
D. 60%
Answers
The minimum average score Ethan can earn on his fifth and final test is option (D) 60% is the correct answer.
What is an average?An average of a list of data is the expression of the central value(mean) of a set of data. Average is calculated by adding quantities together and dividing the total by the number of quantities.
For the given situation,
The scores for 4 exams are 68%,72%, 85%, and 90%.
Let the score for the fifth test be x.
Formula for the average,
[tex]A = \frac{Sum of individual scores}{Total number of tests}[/tex]
⇒ [tex]75=\frac{68+72+85+90+x}{5}[/tex]
⇒ [tex]375=315+x[/tex]
⇒ [tex]x=60[/tex]
Hence we can conclude that the minimum average score Ethan can earn on his fifth and final test is option (D) 60% is the correct answer.
Learn more about averages here
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What's 33 divided by 25.41
Answers
Answer:
1.298701298701
Step-by-step explanation:
hope this helped
Answer:
1.37741046832
Step-by-step explanation:
30 POINTS
Identify the following for the exponential function y = 5(1/4)x.
a. Growth or decay?
b. Initial value
c. Growth/decay factor
d. Growth/decay rate (as a percentage)
Answers
Answer:
A)
Decay
B)
Initial value is 5.
C)
The decay factor is 0.75.
D)
75%
Step-by-step explanation:
An exponential function is given by:
[tex]f(x)=a(r)^x[/tex]
Where a is the initial value and r is the rate.
We have the function:
[tex]y=5(1/4)^x[/tex]
So, a = 5 and r = 1/4.
A)
Remember the guidelines:
It is exponential growth if r > 1. And it is exponential decay if r < 1. (And r must be positive.)Our rate is 1/4 or 0.25.
It is less than 1, so our function is exponential decay.
B)
The initial value is the value in front of our rate.
So, our initial value in this case is 5.
C)
The decay factor will be 1 - r, where r is our rate.
Since our rate is 0.25, our decay factor is 1 - 0.25 = 0.75.
So, we are decaying by a factor of 0.75.
D)
To convert a decimal to a percent, we move the decimal dot two places to the rght and add a percent sign.
So, 0.75 will be 75.0 % or smply 75%.
It is a 75% decay.
Three times the sum of a number, n, and 5 is at least 17. Which of the following inequalities properly models
this statement?
(1) 3n+5<17
(3) 3(n+5) 217
(2) 3n+5217
(4) 3(n +5) <17
Answers
Answer:
Step-by-step explanation:3
Answer: 3(n + 5) ≥ 17
HOPE THIS HELPS
*WORTH 100 POINTS*
What is the value of x?
Enter your answer in the box.
Answers
Answer:
39
Step-by-step explanation:
sum of interior angles of a triangle is 180
180-(102+39)=x
180-141=x
39=x
Answer:
39
Step-by-step explanation:
it should all add up to 180
102 + 39 = 141
180 - 141 = 39
which of the following is not necessary to book a flight
a) credit card
b) arrival city
c) drivers license
d) date of travel
Answers
The option C. Driver's License is not necessary to book a flight.
What is Driver's License?Driver's License is an official document given to a person who is permitted to drive vehicle on the road.
This is usually given after certain tests including Physical driving and other general knowledge of driving.
Now, when we book a flight, credit card can be used to book a flight, but not necessary.
But there is a chance than you can use the credit card.
Arrival city is necessary when you book a flight because then only other procedures will follow.
Similarly, date of travel is also required in order to book the flight on a particular day.
So the least necessary document is Driver's License.
Hence Driver's License is not necessary to book a flight.
To learn more about Booking a Flight, click :
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The model below shows the product of two fractions. Which expression does the
model represent?
12
13
16
3
х
16
Answers
That’s i don’t know lol
Keith’s
Jayden is starting a business selling handmade necklaces. He has decided to invest an initial amount of $300 for advertising, and materials cost $8 for each necklace he makes. Jayden can sell his creations for $14 per necklace. Once he makes and sells a certain number of necklaces, he will break even, with identical expenses and sales. How many necklaces would that take?
Answers
Answer:
14-8=6/300=50 thats your answer
4. Which of the following is equivalent to the
expression below?
4x + 3(2x +1) + 4x
A 14x
,
C 14x + 3
B6x + 3
D 14x - 3
5. What are the like terme in the av
Answers
Answer:
14x+3
Step-by-step explanation:
The given expression is as follows :
4x + 3(2x +1) + 4x
We need to find the equivalent expression for the above.
So,
4x + 6x +3 + 4x
Adding x terms,
14x+3
Hence, the correct equivalent expression is 14x+3.
MHANIFA PLS HELP ME :), or it cud just be anyone :)rEALLY EZ PLS HELP!!! ASAP TY :)
show all work converto to radical form and simplify if possibblr 36-^3/2
Answers
Answer:
216Step-by-step explanation:
36^(3/2) = (6^2)^(3/2) =6^(2*3/2) =6^3 = 216Answer:
[36^3] squared
Step-by-step explanation:
formula a x/n= n [a^x] squared
a x/n= n [36^3]
[36^3] squared
help!! slove for x, 13x + 47 = 151
Answers
Answer:
Step-by-step explanation:
13x + 47 = 151
subtract 47 from both sides
13x = 104
divide by 13 on both sides
x = 8
Rachel paid $25.50 for three t-shirts. What was the unit price of the t-shirts?
A:$7.65 per shirt
B:$8.05 per shirt
C:$8.50 per shirt
D:$9.50 per shirt
Answers
Answer:
C
Step-by-step explanation:
You do $8.50 Times 3 to get $25.50
You purchase a new shirt that cost $18.00. Sales tax is added at the register at a rate of 7%. Thus time I would like to know what the total cost of the shirt is including sales tax?
Answers
A pair of shoes is on sale for 80% of the original price. The sale prive is $60. What was the original price?
Answers
Answer:
75
Step-by-step explanation:
You will set the equation up as part/whole = percent/100 and when you replace it with your numbers you get 60/x = 80/100 now you cross multiply and do 60*100 = 80 * x and you get 6,000 = 80x now you divide both sides by 80 then you get 75 was the original price
Which of the following expressions is equivalent to the expression 2(7x+3)
Answers
Answer:
14x+6 and (7x+7)+(3+3)
Step-by-step explanation:
please help!!!!!!!!!!! 15 points and brainliestor whatever it’s called
Answers
Answer:
The answer should be [tex]9*10^{16}[/tex]
Step-by-step explanation:
Alonzo charges $150 for 5 hours of tutoring.
What is his rate per hour.
I’m confused
Answers
Answer:
C: $30/hr
Step-by-step explanation:
In order to find the rate per hour you must divide: 150 ÷ 5
Which will give you 30
Also if you took away the 0 in "150" then it would be like says "15 ÷ 5" which is 3 but then you have to add the zero back making it 30
Therefore your overall answer is going to be C, $30/hr
it took Jenny and her family one hour to drive to her grandmother's house her grandmother lives about 45 miles away at what rate did the Family Travel
Answers
Answer:
The family traveled at 45 miles per hour.
Step-by-step explanation:
John drove to visit his grandmother. To get there, he drove 157.5 miles on the highway and a few miles further on city streets. The highway part of his drive took him 2.5 hours. If John drove at a steady pace, how fast did he drive on the highway?
Answers
Answer: 63 mph
Step-by-step explanation:
Speed is determined by dividing the distance traveled by the time taken to travel it.
Speed = Distance of highway / Time spent on highway
= 157.5 / 2.5
= 63 miles per hour
WILL MARK BRAINLIEST IF EXPLAINED! G with FA and FE tangent at A and E.
Find mADB Find mABD Find mAFE Find mACE
PLEASE EXPLAIN HOW YOU GOT YOUR ANSWER! :)
Answers
Answer:
angle ADB = 41 degrees
angle ABD = 90 degrees
angle AFE = 70 degrees
angle ACE = 31 degrees
Step-by-step explanation:
angle ADB = 41 degrees because minor arc AB = 82 degrees and it's inscribed angle is 1/2 of it's arc.
angle ABD = 90 degrees because arc AED = 180 degrees and inscribed angles are equal to 1/2 of the arc.
arc ABD = 180
arc ABE = arc ABD + 70 degrees = 250 degrees
minor arc AE = 360 degrees-250 degrees = 110 degrees
angle AFE = 1/2 (250-110) = 70 degrees
angle ACE = 1/2(110-48) = 31 degrees