Answer:
27.1 dollars
Step-by-step explanation:
What is the sum of 8x^2-x+4 and x-5 is
Answer:
8x^2-1
Step-by-step explanation:
8x^2-x+4+x-5=8x^2-x+x+4-5=8x^2+4-5=8x^2-1
What's the slope and y-intercept?
Help please!!!
Answer:
slope of fig 1st(m)= 1/4
y-intercept of 1st fig=-1
slope of fig 2= -1
y-intercept of 2nd fig=2
Step-by-step explanation:
Annalise is selling stickers and buys them for $2 each. If she wants to markup the price by 25% how much does she need to sell each sticker for?
Noah and Andre are 15 miles apart on a bike path when they start biking toward each other. Noah rides at a constant speed of 4 miles per hour, and Andre rides at a constant speed of 2 miles per hour. How long does it take until Noah and Andre meet?
Answer:
2.5 hours
Step-by-step explanation:
Noah Andre
4 2 =6 1hr
8 4 =12 2hr
12 6 =18 3hr
10 5 =15 2.5hr
2l+2w for l = 5.2 and w = 6.7
Answer:
23.8
Step-by-step explanation:
2(5.2) + 2(6.7) = 23.8
Answer:
23.8 ...............
Step-by-step explanation:
I asked my alexa.
Lin swims 10 laps in the pool in 25 minutes.
How many minutes per lap is that?
I am not good at math (о´∀`о)
Answer:
The answer is 2.5 minutes per lap.
Step-by-step explanation:
Divide the number of minutes by the amount of laps:
25/10 = 2.5
To check your answer, multiply 2.5 my the amount of laps.
2.5 x 10 = 25
I hope this helped you! If it did, please consider rating, pressing thanks, and/or giving my answer 'Brainliest.' Have a wonderful day. :)
Answer:
40 seconds per lap
Step-by-step explanation:
10 divided by 25 is 0.4
So im pretty sure the anser is 40 secounds
Sorry if im wrong- im not that great at math eaither I just used a calculator.
(2x+5)^2
is it 4x^2+20x+25?
What is the solution to -4|-2x + 6| = -24?
x = 0
x= 0 or x = -6
x = 0 or x = 6
no solution
How do break down what is the percentage of change in cost of the pizza
Given the set of test scores: 71, 75, 80, 81, 81, 84, 89, 93. If a score of 50 is added to the data set, which statement is true? Select all that apply. Choose all that apply:
The mean decreases.
The median decreases.
The standard deviation increases.
The range increases.
Answer:
The standard deviation increases, it's mean, medium and mode, if you put them in order and then go through and get your middle number it'll be 81.
If a score of 50 is added to the data set,
The standard deviation increases.
The range increases.
What is mean?"It is the average of all elements of the data set."
What is median?"It is the middle number in a sorted list of numbers."
Formula to calculate the standard deviation:[tex]SD=\sqrt{\frac{\sum{(x-M)^{2}} }{N} }[/tex]
where, SD is the population standard deviation
N : the size of the population
x : each value from the data
M : the mean of the data
Formula to calculate the range of the data:range = maximum value - minimum value
For given situation,
Consider the original set of test scores: 71, 75, 80, 81, 81, 84, 89, 93
N = 8
range R = 93 - 71
⇒ R = 22
Mean M = (71 + 75 + 80 + 81 + 81 + 84 + 89 + 93)/8
⇒ M = 654/8
⇒ M = 81.75
Now, we find the median K
First we sort given data set: 71, 75, 80, 81, 81, 84, 89, 93
The middle numbers are 81 and 81
So, the median is the average of 81, 81
So, K = 81
Now, we calculate the standard deviation.
[tex]SD=\sqrt{\frac{[(71-81.75)^{2}+(75-81.75)^{2}+...+(89-81.75)^{2}+(93-81.75)^{2}] }{8} }[/tex]
⇒ SD = 6.61
Consider, the set of test scores with 50 added to the data set.
N = 9
range R = 93 - 50
⇒ R = 43
Mean M = (71 + 75 + 80 + 81 + 50 + 81 + 84 + 89 + 93)/9
⇒ M = 704/9
⇒ M = 78.22
Now, we find the median K
First we sort given data set: 50, 71, 75, 80, 81, 81, 84, 89, 93
The middle number is 81.
So, the median is K = 81
Now, we calculate the standard deviation.
[tex]SD=\sqrt{\frac{[(71-81.75)^{2}+(75-81.75)^{2}+...+(50-81.75)^{2}+(93-81.75)^{2}] }{9} }[/tex]
⇒ SD = 11.76
So, we can observe that if a score of 50 is added to the data set, the correct statements are:
The standard deviation increases.
The range increases.
Learn more about mean, standard deviation, median, range here:
https://brainly.com/question/17998130
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A car has 15 gallons of gas in its tank. The car can travel 35 miles per gallon of gas. It uses of a gallon of gas to go one mile.How far can the car travel with 15 gallons? How much gas does the car use to go 100 miles?
Answer:
525 miles it can go
6.6 gallons t go 100 miles
Step-by-step explanation:
Is 3(x + 1)2 = (3x + 3)2 an identity? Explain and show your reasoning.
Answer:
YES
Step-by-step explanation:
The equation, [tex] 3(x + 1)2 = (3x + 3)2 [/tex], would be an identity if the equation remains true regardless of the value of x we choose to plug in into the equation.
Let's find out if we would always get a true statement using different value of x.
✍️Substituting x = 1 into the equation:
[tex] 3(x + 1)2 = (3x + 3)2 [/tex]
[tex] 3(1 + 1)2 = (3(1) + 3)2 [/tex]
[tex] 3(2)2 = (3 + 3)2 [/tex]
[tex] 12 = 12 [/tex] (TRUE)
✍️Substituting x = 2 into the equation:
[tex] 3(x + 1)2 = (3x + 3)2 [/tex]
[tex] 3(2 + 1)2 = (3(2) + 3)2 [/tex]
[tex] 3(3)2 = (6 + 3)2 [/tex]
[tex] 18 = 18 [/tex] (TRUE)
✍️Substituting x = 3 into the equation:
[tex] 3(x + 1)2 = (3x + 3)2 [/tex]
[tex] 3(3 + 1)2 = (3(3) + 3)2 [/tex]
[tex] 3(4)2 = (9 + 3)2 [/tex]
[tex] 24 = 24 [/tex] (TRUE)
Therefore, we can conclude that the equation, [tex] 3(x + 1)2 = (3x + 3)2 [/tex], is an identity.
The speed of a boat in still water is 10 km/hr. If it can travel 78 km downstream and 42 km upstream in the same time, the speed of the stream is?
Answer:
umm let me look at this one more time then I will answer:)
After a 15% increase, a town has 115 people. What was the population before the increase?
Answer:
100 people
Step-by-step explanation:
Population Of People=115Percentagencrease=15%
The New Population corresponds to 115%
(That is 100+15)
We want to find the population that corresponds to 100% that is the original population.
Therefore Original Population;
[tex] \frac{100}{115}\times {115}{} [/tex]
[tex]100 \: people[/tex]
A newspaper’s cover page is 3/
8 text, and photographs fill the rest. If 2/
5 of the text is an article about
endangered species, what fraction of the cover page is the article about endangered species
Answer:
The answer is 0.15
Step-by-step explanation:
In this 2/5 of 3/8 is about endangered species
Therefore to obtain the answer we need to multiply the two fractions
2/5 × 3/8
Fraction of the cover page about endangered species is therefore = 2/5 × 3/8
= 0.15
Consider the equation a(3-x)=-2x+b What values of a and b make the solution of the equation x=-2? Write a number from the box onto each blank to complete the answer.
Answer:
4x-7
Step-by-step explanation:
Who ever gets it right gets a Brainliest
Answer:
im pretty sure thats a trench ;_;
Step-by-step explanation:
Fihd the area of the triangle.
6
8
square units
Answer:
area of triangle is
[tex]\frac{1}{2} * b*h\\\\\frac{1}{2} *6*8\\\\6*4=24[/tex]
How many hundreds are in 200 + 10 + 6
Answer:
Two.
Step-by-step explanation:
200 + 10 + 6 = 216
216 divided by 100 is 2.16
Therefore there are two hundreds in 200 + 10 + 6
I can't help solve my friends problems,I got too much to do help him out please
Answer:
the ask a question about the question isnt working
Step-by-step explanation:
but can you zoom in its really glitchy and blurred from far away
Yeah I would also need it zoomed in please.
Which function describes the arithmetic sequence shown?
The sequence is : -1, 1, 3, 5, 7, 9, 11, 13
Answer:
The function [tex]a_n=2n-3[/tex] describes the arithmetic sequence.
Step-by-step explanation:
Given the sequence
-1, 1, 3, 5, 7, 9, 11, 13
An arithmetic sequence has a constant difference 'd' is defined by
[tex]a_n=a_1+\left(n-1\right)d[/tex]
Compute the differences between all the adjacent terms:
[tex]1-\left(-1\right)=2,\:\quad \:3-1=2,\:\quad \:5-3=2,\:\quad \:7-5=2,\:\quad \:9-7=2,\:\quad \:11-9=2,\:\quad \:13-11=2[/tex]
As the difference between all of the adjacent terms is the same and equal to
[tex]d=2[/tex]
As the first element is
[tex]a_1=-1[/tex]
so the term will be:
[tex]a_n=a_1+\left(n-1\right)d[/tex]
[tex]a_n=2\left(n-1\right)-1[/tex]
[tex]a_n=2n-3[/tex]
So, the function [tex]a_n=2n-3[/tex] describes the arithmetic sequence.
Is 0 a real rational irrational integer whole natural number?
Answer:
0 is a rational, whole, integer and real number. Some definitions include it as a natural number and some don't (starting at 1 instead).
Answer:
0 is a rational, whole, integer and real number.
The function y=15x + 100 models the freight shipping charge of x pounds of cargo. What best describes the constant term of the function
Answer:
the constant is 15
Step-by-step explanation:
because it is constantly going up. the slope (15x) is what changes.
For which equation does x = 2?
Answer:
what are the equations
Step-by-step explanation:
Find the interest on $900 at 6% for 4 years if the interest is added to the principal at the end of each year. Show your work. PLEASE HELP
Answer:
$1116
Step-by-step explanation:
6% of 900 = $54
54*4 = $216
900 + 216 = $1116
Given:x+=9 prove x=4
Reasonable Answer:
If x is 4, then the answer is 13 or 5.
Step-by-step explanation:
9-4=5
For another reason it's 13.
4 minus 13 =9
~~~Hope this helps~~~:)
Are these proportional?
Yes | No
Answer:
yes
Step-by-step explanation:
multiply 6 for the numerators and denominaters
Answer:
Yes they are proportional
Step-by-step explanation:
May I please have brainliest?
What are the y- coordinates of b
rosa has a piece of cloth she used to fourth of on making a cover for the dining table and 1/5 of in making headdress what part of the cloth is not used
A teacher kept track of what students consumed at a school picnic. For three grades, the ratios of the amount of water consumed to the amount of fruit juice consumed were equivalent
6th: 5 water 6 juice
7th 20 water ___ juice
8th 10 water ____juice
Answer:
the first one is 21 and the second one is 11
Step-by-step explanation:
I am not 100 percent sure