Answer:
81
Step-by-step explanation:
9^2 means that you are squaring nine
when you square a number you multiply it by itself
so
9 x 9 =81
hope this helps :)
Answer:
Step-by-step explanation:
9^2 means squaring 9 which equals to 81
For the person who needed to see the picture
Sammy is trying to determine how many triangles she can create out of a square grid that has a side of 10 inches. Use the image below to determine the area of the triangle and how many she can cut out.
Answer:
in total only 2 triangles can fit in the box
Step-by-step explanation:
all u have to do is take the box length (10) and divide it by the triangle length (5) and you get 2
Step-by-step explanation:
They can make 4 triangles and the area is 25 in2
3. The fuel economy of a car, measured in miles per gallon, is modeled by the function f(s) = -0.009s² +0.699s +12 where s represents the speed of the car, measured in miles per hour. What's the fuel economy of the car when it
travels at an average of 20 miles an hour?
O A. 20 miles per gallon
O B. 26.63 miles per gallon
4
O C.-10.02 miles per gallon"
O D. 22.38 miles per gallon
O Mark for review (Will be highlighted on the review page)
Answer:
The Answer Will Be D
Step-by-step explanation:
The fuel economy of a car is modeled by the function f(s) = -0.009s² +0.699s +12 where s represents the speed of the car, measured in miles per hour.We need to find the fuel economy of the car when it travels at an average of 20 miles an hour.f(20) = -0.009(20)² +0.699(20) +12f(20) = -0.009(400) +13.98f(20) = 9.6The fuel economy of the car when it travels at an average of 20 miles an hour is 9.6 miles per gallon.Therefore, the answer is option D. 22.38 miles per gallon.
For two n by n square matricies A and B,
suppose rankA = rankB = n-1.
Can rank(AB) become less than n-1 ?
(e.g. rank (AB) = n-2)
If so, I humbly ask you for an example.
Thank you very much.
No, the rank of the product of two n by n square matrices A and B, denoted as AB, cannot be less than n-1 if both A and B have ranks of n-1.
According to the Rank-Nullity theorem, for any matrix M, the sum of its rank and nullity is equal to the number of columns in M. In this case, the number of columns in AB is n, so the sum of the rank and nullity of AB must be n.
If rank(A) = rank(B) = n-1, it means that both A and B have nullity 1. The nullity of a matrix is the dimension of its null space, which consists of all vectors that get mapped to the zero vector when multiplied by the matrix. Since both A and B have rank n-1, their null spaces consist only of the zero vector.
Now, considering AB, if the rank of AB were less than n-1, it would mean that the nullity of AB is greater than 1.
However, this would violate the Rank-Nullity theorem since the sum of the rank and nullity of AB must be n, which is the number of columns.
Therefore, if rank(A) = rank(B) = n-1, the rank of AB cannot be less than n-1.
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-1/3v = -7 how do i solve this equation?
Answer: v=2.33333333333333.........
Step-by-step explanation: What you would want to do is divide both sides by -1/3 and that would get you v=2.333333.......
Omg HELP ME!!
plz help me ill give a whoever the correct answer the brainiest!!
ty!!
zero
Step-by-step explanation:
Since the given depths are negative when measured against the ground level, then that means that the ground level is represented by zero.
Michelle Michelle opened an interest-bearing savings account. She deposited 8750$ into the account. If the account earns 1.3% simple interest. What will be Michelle’s balance after two years
Michelle's balance after two years would be $8977.50.
How to calculate Michelle’s balance after two yearsusing the formula to find Michelle’s balance after two years:
balance = principal + (interest rate * principal * time)
where:
- principal = the initial deposit of $8750
- interest rate = 1.3% = 0.013 (as a decimal)
- time = 2 years
Substituting the values, we get:
balance = 8750 + (0.013 * 8750 * 2)
balance = 8750 + 227.5
balance = $8977.50
Therefore, Michelle's balance after two years will be $8977.50.
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(1, 4), (2, 8), (3, 16), (4, 32)
write a function to represent the data and show your work
The exponential function that represents the given data is:
y = 2*(2)^x
Which function represents the given data?Here we have the following points (1, 4), (2, 8), (3, 16), (4, 32), it seems to be an exponential function, so we assume our function is something like:
y = A*(b)^x
Where A is the initial value and b is the base.
Only using the first two points we can define the function, replacing the values in the general exponential function:
for (1, 4)
4 = A*(b)^1
Using the point (2, 8)
8 = A*(b)^2
So we have the little system of equations:
8 = A*(b)^2
4 = A*(b)^1
Taking the quotient between these we get:
(8/4) = (A*(b)^2)/( A*(b)^1)
2 = b
Then the equation is:
y = A*(2)^x
Now we can replace the values of the first point again (1, 4)
4 = A*(2)^1
4 = A*2
4/2 = A = 2
The exponential function is:
y = 2*(2)^x
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what is the property of 3x(5x7)=(3x5)7
The property you are referring to is called the associative property of multiplication. According to this property, when multiplying three numbers, the grouping of the numbers does not affect the result. In other words, you can change the grouping of the factors without changing the product.
In the equation you provided: 3x(5x7) = (3x5)7
The associative property allows us to group the factors in different ways without changing the result. So, whether we multiply 5 and 7 first, or multiply 3 and 5 first, the final product will be the same.
Please help, determine whether the image was enlarged or reduced and by what scale factor
Answer:
Image was reduced by a scale factor = \(\frac{1}{2}\)
Step-by-step explanation:
Since, segment A'B' is the image of segment AB,
Scale factor = \(\frac{\text{Length of image}}{\text{Length of actual}}\)
= \(\frac{A'B'}{AB}\)
Length of AB = \(\sqrt{(BB')^2+(AB')^2}\) [By Pythagoras theorem]
= \(\sqrt{2^2+4^2}\)
= \(\sqrt{20}\)
= \(2\sqrt{5}\)
Length of A'B' = \(\sqrt{1^2+2^2}\)
= \(\sqrt{5}\)
Scale factor = \(\frac{\sqrt{5} }{2\sqrt{5} }\)
= \(\frac{1}{2}\)
Therefore, image AB has been reduced by a scale factor of \(\frac{1}{2}\)
In a popular online role playing game, players can create detailed designs for their
character's "costumes," or appearance. Samuel sets up a website where players can
buy and sell these costumes online. Information about the number of people who
visited the website and the number of costumes purchased in a single day is listed
below.
81 visitors purchased no costume.
17 visitors purchased exactly one costume.
2 visitors purchased more than one costume.
Based on these results, express the probability that the next person will purchase no
more than one costume as a fraction in simplest form.
Answer: 49/50
Step-by-step explanation:
81 + 17 + 2 = 10
98/100 = 49/50
The probability as a fraction in simplest form is 49/50.
BRAINLIEST
Volume of a cylinder.
Answer:
88
Step-by-step explanation:
Given,
Radius of a cylinder = 2 ft
Height of the cylinder = 7 ft
Therefore, volume of the cylinder
\( = \pi {r}^{2} h\)
\( = \frac{22}{7} \times 2ft \times 2ft \times 7ft\)
\(88 {ft}^{3} (ans)\)
Find the value of x
-1
1
27
x + 18
24
x+16
The value of x in the chord of the circle using the chord-chord power theorem is 0.
What is the value of x?The chord-chord power theorem simply state that "If two chords of a circle intersect, then the product of the measures of the parts of one chord is equal or the same as the product of the measures of the parts of the other chord".
From the figure:
The first chord has consist of 2 segments:
Line segment 1 = 27
Line segment 2 = ( x + 16 )
The second chord also consist of 2 sgements:
Line segment 1 = 24
Line segment 2 = ( x + 18 )
Now, usig the Chord-chord power theorem:
27( x + 16 ) = 24( x + 18 )
Solve for x:
27x + 432 = 24x + 432
27x - 24x = 432 - 432
3x = 0
x = 0
Therefore, the value of x is 0.
Option D) 0 is the correct answer.
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Given AC and BD bisect each other at O prove AC is congruent to c
The Value of CD from the second equation into the first equation:2AC = AB + OC + OD⇒ 2AC = AB + AB (By substituting OC = OA and OD = OB)⇒ 2AC = 2AB⇒ AC Therefore, AC is Congruent to c .
Since AC and BD bisect each other at O, we can say that AO = OC and BO = OD.
We need to prove that AC = CD.To do this, we can use the segment addition postulate which states that if a line segment is divided into two parts, the length of the whole segment is equal to the sum of the lengths of the two parts.
Let us draw a diagram to represent the given information:From the diagram, we can see that:AO + OB = AB (By segment addition postulate)OC + OD = CD (By segment addition postulate)AO = OC (Given)BO = OD (Given)
Now, we can substitute the values of AO and OC as well as BO and OD into the equations above:AO + OB = AB ⇒ OC + OB = AB (Substituting AO = OC)OC + OD = CDNow, we can add both equations:OC + OB + OC + OD = AB + CD ⇒ 2(OC + OD) = AB + CDWe know that OC = AO and OD = BO.
Therefore, we can write:2(AO + BO) = AB + CDSince AO = OC and BO = OD, we can write:2(OA + OD) = AB + CDNow, substituting AO = OC and BO = OD, we can write:2AC = AB + CD
Finally, we can substitute the value of CD from the second equation into the first equation:2AC = AB + OC + OD⇒ 2AC = AB + AB (By substituting OC = OA and OD = OB)⇒ 2AC = 2AB⇒ AC
Therefore, AC is congruent to c .
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The purchase price of a condominium is $123,500. A down payment of 23% is made. The bank charges $725 in fees plus 3 1/2 points. Find the total of them down payment and the closing costs. Round your answer the the nearest cent.
Answer:A down payment of 25% is made. The bank charges $725 in fees plus $$3 \frac { 1 } { 2 }$$ points. Find the total of the down payment and the closing costs. ... The bank charges $725 in fees plus 312. points. Find the total of the down payment and the ... We found a book related to your question. ... Round to the nearest cent.
Step-by-step explanation: i hope it helps your qestion
If the purchase price of a condominium is $123500, down payment of 23%, then the total of down payment and the closing costs is $166725.
What is percentage?Percentage is the number or ratio that is expressed in fraction of 100. It is expressed as %. It shows some part of large quantity.
How to find total?We have been given that the price of condominium is $123500. Down payment is 23% of the total price , it is 23%*123500=$28405
Left out amount will be 123500-28405=$95095.
Points=(2*3+1)/2=7/2
let the percentage of fees be x% then fees percentage will be :
7/2=x/100
x=35%
Fees will be 123500*35%=$43225.
Closing cost=95095+43225=$138320
Total will be 28405+138320
=$166725
Hence the total of down payment and closing cost will be $166725.
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The stemplot shows the snowfall, in inches, in US cities during December.
Use this graphic to answer the question.
Use the drop-down menus to complete the statements about the snowfall amounts shown in the stemplot.
This distribution of snowfall amounts is
. There appears to be one outlier in snowfall amount at
inches.
This distribution of snowfall amounts is skewed to the right
When are data skewed to the rightData is said to be skewed to the right or positively skewed, when the tail of the distribution extends more towards the right side of the data. This means that there are a few larger values or outliers that pull the mean or median towards the higher end of the scale, resulting in a longer tail on the right side of the distribution.
In a positively skewed distribution majority of the data is concentrated towards the lower values.
Considering the stemplot the majority of the data is in the lower values
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Answer:
to the second part
18.7 inches
I NEED HELP PLS HURRY
1. Write each expression with a single exponent:
a. (10^7)²
b. (10^9)³
c. (10^6)³
d. (10^2)³
e. (10³)²
f. (10^5)^7
Answer:
We use the rule,
\((a^b)^c = a^{bc}\)
a. (10^7)²
\((10^7)^2 = 10^{(7)(2)} = 10^{14}\)
10^14
b. (10^9)³
\((10^9)^3 = 10^{(9)(3)} = 10^{27}\)
10^27
c. (10^6)³
\(10^{(6)(3)}= 10^{18}\)
10^18
d. (10^2)³
\(10^{(2)(3)} = 10^{6}\)
10^6
e. (10³)²
\(10^{(3)(2)}=10^{6}\)
10^6
f. (10^5)^7
\(10^{(5)(7)} = 10^{35}\)
10^35
Step-by-step explanation:
Evaluate the expression (7+6i)−(−9−8i) and write the result in the form a+bi.
Remove the parentheses and combine the like terms:
7 - -9 = 7+ 9 = 16
6i - -8i = 6i +8i = 14i
The answer is 16 + 14i
Which expression is equivalent to -3z +17 - (-152) - (-4)?
12:z+ 13
-18z: + 13
18z: +21
12z: +21
Answer: -3z+173
Step-by-step explanation:
\(-3z+17-(-152)-(-4)\\\\-3z+17+152+4\\\\\boxed{-3z+173}\)
Find the distance between the two points rounding to the nearest tenth (if necessary).
(4,2) and (1, -2)
Answer:
5 units
Step-by-step explanation:
Calculate the distance d using the distance formula
d = \(\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }\)
with (x₁, y₁ ) = (4, 2) and (x₂, y₂ ) = (1, - 2)
d = \(\sqrt{(1-4)^2+(-2-2)^2}\)
= \(\sqrt{(-3)^2+(-4)^2}\)
= \(\sqrt{9+16}\)
= \(\sqrt{25}\)
= 5
If I was getting food stamps and I needed three months proof of income and I had to have a gross of 2495 and net of 1920 what would I need to put for the three months income amount?
Answer:
26
Step-by-step explanation:
10 + 15
Answer:
Step-by-step explanation:
yes you would. they are very strict with food stamps or EBT card they will still ask for the 3 months for so put in your 3 months and you should be fine.
The sum of two times a number and 11 is five times the difference of a number and six
Answer:
11.
Step-by-step explanation:
I think that is the answer. If so mark brainliest pls
Students were surveyed to determine what they are most afraid of. The results are shown in the bar graph below.
What is the average number of students who are afraid of spiders and snakes?
A) 7
B) 9
C) 15
D) 30
The average number of students who are afraid of spiders and snakes is 15. (Option C).
How to get the Average?To calculate the average number of students who are afraid of spiders and snakes, you need to add the number of students afraid of spiders and the number of students afraid of snakes, and then divide by 2 (since there are two categories being considered: spiders and snakes).
Average = (Number of students afraid of spiders + Number of students afraid of snakes) / 2
Given the information:
Number of students afraid of spiders = 18
Number of students afraid of snakes = a little more than 11 (let's consider 12 for calculation)
Average = (18 + 12) / 2 = 30 / 2 = 15
So, the average number of students who are afraid of spiders and snakes is 15.
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HELP LIKE FR I SRSLY DK
Answer: whole = 45; part = 15%
Step-by-step explanation:
The part ( a.k.a the fraction) is the percentage.
15% can be expressed as 15/100 = 3/20.
The whole is 45.
Hope this helps! :)
Danny’s home cost $350,000. If the federal government program for flood damage insurance covers only $150,000, what percent of the total value does this represent?
Amount of $150,000 represents 42.86% of $350,000.
What is Equation Modelling?
Equation modelling is the process of writing a mathematical verbal expression in the form of a mathematical expression for correct analysis, observations and results of the given problem.
We have Danny’s home cost $350,000. The federal government program for flood damage insurance covers only $150,000.
Assume that it represents [x%] percent of the total value. Then, we can write -
x = (150000/350000) x 100
x = 42.86%
Therefore, $150,000 represents 42.86% of $350,000.
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a teacher created two way table for four different classrooms the tables track whether each student has an after school job or not and whether they are in art class only, music class only, both classes, or neither class.
Answer:
1) Classroom 2
2) Classroom 3
3) Classroom 2
4) Classroom 4
Can someone please help me with my math homework?
Write an algebraic expression for the following phrase three more than twice a number
The algebraic expression for "three more than twice a number" is translated as: 2n + 3.
What is an Algebraic Expression?An algebraic expression is a mathematical statement that is written to represent a phrase, using alphabets as variables of the algebraic expression, operation signs and numbers.
How to Write an Algebraic Expression?Given the phrase "three more than twice a number", we can represent the number using the variable, x.
Therefore:
Twice the number, n, would be: 2n
3 more than 2n would be translated as: 2n + 3.
The whole phrase, translated into algebraic expression is expressed as: 2n + 3.
Conclusively, the algebraic expression for "three more than twice a number" is translated as: 2n + 3.
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Please help meeeeeee!!!!!! 4th time posting this
Answer:
70 cds in 2022
Step-by-step explanation:
each year number of dvds being sold is decreasing by 15. In 2010, it was 250. 5 years later, it was 175.
250-175=75.
75/5=15.
15x7=105.
175-105=70.
in 2010 it was 250 and 250+150=400.
in 2000, it was y=400-15x
Listed below is a table showing the number of employees. 20 years or older by gender in the United states
The total number of workers that were studied can be found to be 139,340,000.
The percent of workers unemployed would be 5. 4 %.
Percentage of unemployed men is 5. 6 % and unemployed women is 5. 1%.
How to find the employment figures ?Number of employed workers :
= 74,624,000 + 64, 716, 000
= 139,340,000
Percentage unemployed :
= ( 4, 209,000 + 3,314,000 ) / 139,340,000
= 5. 4 %
Percentage of unemployed men :
= 4,209,000 / 74,624,000
= 5.6 %
Percentage of unemployed women:
= 3,314,000 / 64, 716, 000
= 5. 1 %
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The full question is:
a. How many workers were studied?
b. What percent of the workers were unemployed?
c. Compare the percent unemployed for the men and the women.
The sum of a number and 45 plz need the answe
Answer:
n + 45
Step-by-step explanation:
The question is asking to write an algebraic expression for the sum of a number and 45. We know we are adding a number to 45. So we use addition. But, we don't which number we are adding to 45. So we just use a variable. I used "n", but use whatever letter you want ( x, y, z, etc). I recomend using the same variable that your intrcuctor uses.
Hope this helps.