Kana tried to solve the system of equations below. She says there are no solutions. Is Kana correct? Explain your reasoning.
The solution for the given system of equations:
x = 6 and y = 6.
Kana is incorrect about the solutions of the given equations.
What are algebraic properties?Algebraic expressions and equations follow the same set of rules as numerical expressions and equations. The order of operations is preserved, and the laws governing addition and multiplication still apply.
Associative: a + ( b + c ) = ( a + b ) + c , a ( b c ) = ( a b ) c
Identity: a + 0 = a , a ⋅ 1 = a
Inverse: a + ( − a ) = 0 , a ⋅ 1 a = 1
Distributive: a ( b + c ) = a b + a c
Given equations,
4x-2y=12 -----(a)
2x+2y=24 -----(b)
Multiplying -2 to the equation (b) like kana solution
-2 (2x+2y=24 )
By Distributive property
-2(2x+2y) = -2(24)
- 4x - 4y = - 48 ---------(c)
Now adding equation (a) and equation(c)
4x - 2y = 12
- 4x - 4y = - 48
__+___+____+__
- 6y = -36
⇒ y = 36/6 = 6.
Putting value of y in equation (b).
2(x) + 2(6) = 24
2x + 12 = 24
2x = 24 - 12
2x = 12
x =12/2 = 6
By the above calculation,
Value of x = 6 and
value of y = 6.
Hence, for the system of equations given
the solutions are:
x = 6 and y = 6
which proves that Kana is incorrect that there are no solutions.
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GIVING 100 PTS AND BRAINLIEST IF ALL ARE ANSWERED CORRECTLY NOT GUESSED WITH EVIDENCE IF YOU GET THEM ALL CORRECT I WILL THROW IN 200 POINTS
Answer:
(2,1)
6928ft
59.0813m
26 1/4m
Step-by-step explanation:
Area of a trapezoid = (a+b)*h/2 so (100+150)*80/2
= 10000
Area of a rectangle = l*w so 48*64
=3072
10000-3072 = 6928
The surface area of a square pyramid is A=a^2+2a√a^2/4+h^2 which is A=4^2+2(4)√(4)^2/4+(5)^2 which = 59.08
Volume of a rectangular prism is l*w*h so 3.5*1.25*6 = 26.25 which is equal to 26 1/4
Solve for x
Pls help
Answer:
because SRC is the outer angle of the triangle STR
=> SRC = STR + TSR
<=> 101 = 4x + 12 + 7x + 12
<=> 101 = 11x + 24
=> 11x = 77
<=> x = 7
Answer:
7
Step-by-step explanation:
➝4x+12+7x+12=101°
➝4x+7x+12+12=101°
➝11x+24=101°
➝11x=101-24
➝11x=77
➝x=77/11
➝x=7
I’m seriously stuck Please help in anyway
Answer:
Step-by-step explanation:
8 over 2
Answer:
Exact Form:
7 √ 53 /53
Decimal Form:
0.96152394
Step-by-step explanation:
free branliest! come come comeeee get it!
Answer:
thanks i appreciate it
Answer:
Thank you Do you Have a question Or?
I need help on this question
Answer:
11. Volume = 2181.2mm^3
12. Surface Area = 1204.49mm^2
Step-by-step explanation:
We first need to find the hypotenuse side of the triangle using the Pythagorean theorem:
a^2+b^2 = c^2
13.3^2+20.5^2 = c^2
176.89+420.25 = c^2
597.14 = c^2
24.44 = c
Now we can find the volume using the formula:
V = 1/4(16)sqrt-13.3^4+2(13.3*20.5)^2+2(13.3*24.44)^2
-20.5^4+2(20.5*24.44)^2-24.44^4
V = 2181.2mm^3
To find the surface area using the surface area formula:
A = (13.3*16)+(20.5*16)+(24.44*16)+1/2sqrt
13.3^4+2(13.3*20.5)^2+2(13.3*24.44)^2
-20.5^4+2(20.5*24.44)^2-24.44^4
A = 1204.49mm^2
Find the total surface of a cylinder with a diameter of 8km and height of 7km
Answer:
A≈276.46km²
d Diameter
8
km
h Height
7
km
A container with an open top is to have 10 m3 capacity and be
made of thin sheet metal. Calculate the dimensions of the box if it
is to use the minimum possible amount of metal.
The dimensions of the box if it is to use the minimum possible amount of metal are,
⇒ 2.714 m, 2.714 m, 1.358 m
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
A container with an open top is to have 10 m³ capacity.
Now,
Let the dimensions are x, y and z.
Since, Volume of box = 10 m³
Hence, We get;
⇒ xyz = 10
⇒ z = 10/xy
Since, A container is open in top.
Hence, The surface area = 2xz + 2yz + xy
Substitute z = 10/xy;
⇒ S.A = 2x (10/xy) + 2y (10/xy) + xy
= 20/y + 20/x + xy
For minimum metal;
⇒ d (S.A)/ dx = 0
⇒ - 20/x² + y = 0
⇒ y = 20/x² ..(i)
And, d (S.A) / dy = 0
⇒ - 20/y² + x = 0
⇒ x = 20/y² ..(ii)
Divide equation (i) and ((ii);
⇒ x = y
Hence, We get;
⇒ xyz = 10
⇒ x³ = 10
⇒ x = 2.714
And, y = 2.714
So, The value of z is,
⇒ z = 10/xy
⇒ z = 10 / 2.714×2.714
⇒ z = 1.358 m
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Marathon Race. Carlos, Maura, and Jacob are running a marathon-26 miles. Carlos runs at a rate of 6 miles per hour. Carlos runs at a rate that is 25% slower than Maura's rate. Jacob takes 2 hours and 36 minutes to finish the marathon. Determine and clearly show everyone's speed. Show or explain your
calculations. Clearly show the exact time it takes for each person to finish the race.
First, let's find Maura's running speed by using the information that Carlos runs at a rate that is 25% slower than Maura's rate. If Carlos runs at a rate of 6 miles per hour, then Maura runs at a rate of 6 * 1.25 = 7.5 miles per hour.
How to calculate time?Next, let's calculate how long it takes for Carlos to finish the marathon. We know that Carlos runs at a rate of 6 miles per hour and the marathon is 26 miles long. So we can use the formula:
time = distance/rate
time = 26/6
time = 4.33 hours
Now let's find how long it takes for Maura to finish the marathon. We know that Maura runs at a rate of 7.5 miles per hour and the marathon is 26 miles long. So we can use the formula again:
time = 26/7.5
time = 3.47 hours
Finally, let's convert Jacob's time of 2 hours and 36 minutes to hours. We can use the formula:
time = 2 + (36/60)
time = 2 + 0.6
time = 2.6 hours
In conclusion, Carlos takes 4.33 hours, Maura takes 3.47 hours and Jacob takes 2.6 hours to finish the marathon.
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25, 22, 21, 23, 24 find the mean
Answer:
23
Step-by-step explanation:
25+22+21+23+24= 115
115/5 = 23.
Answer:
The mean is 23 Your welcome
What is the value of a + c if a = 18, b = 27, and c = 11?
38
45
29
16
Answer:
c) 29
Step-by-step explanation:
a and c are given as 18 and 11, respectively.
[tex]a + c\\= 18 + 11\\=29[/tex]
Which graph represents a function?
P
9k/65 = 1316/845
find k and show work
Answer:
k= 1316/117
Step-by-step explanation:
Answer:
k = 1316/117
Step-by-step explanation:
Solve for kk by simplifying both sides of the equation, then isolating the variable.
Multiply both sides of the equation by 659659.
65/9 x 9k/65 = 65/9 x 1316/845
Simplify both sides of the equation.
Simplify the left side.
k = 65/9 x 1316/845
Simplify the right side.
Now your answer is:
k = 1316/117
What is the slope of the line?
Answer:
2
Step-by-step explanation:
Rise over run.
The line goes up two and over one. So you get 2/1. Then you can just get rid of the denominator. 'Cause that's how fractions work. You can get rid and add 1 as a denominator.
Answer:
The slope is 2.
Step-by-step explanation:
Let me know if you need an explanation.
hope this helps and is right :)
write an expression to match the quotient of 42 and 2 subtracted from 34
Answer:
13
Step-by-step explanation:
42/2 = 21
34-21 = 13
I need c15 and c16 doing please with working out thank you
Therefore , the solution to the given problem of circle comes out to be area = 25.1 sq cm and perimeter=12.5 cm.
What is the circle?Every position in a circle's plane is equally spaced from the centre and is considered to be a closed, double object. A line of reflected symmetry is created as a result of each line traversing the circle. Each angle also has an axis of symmetry that circles its center.
Here,
Given : Diameter = 8
Radius = 8/2 = 4cm
To find the semi circle area
=>semi circle area = πr²
=> 22/7 * 4² *1/2
=> 25.1 sq cm
To find the perimeter of semi circle :
=> 2πr /2
=> πr
=> 22/7*4
=>12.5 cm
Therefore , the solution to the given problem of circle comes out to be area = 25.1 sq cm and perimeter=12.5 cm.
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Dan pays £240 per week in rent.
His landlord decides to decrease the rent by 2.5%.
How much rent does he pay now?
Answer:
234 pounds
Step-by-step explanation:
100% - 2.5% = 97.5%
(0.975)(240) = 234
234 pounds
Answer:
Dan pays £234 now.
Step-by-step explanation:
240 - 2.5% * 240 = 234
Therefore, he pays £234.
Thenks and mark me brainliest :))))
What is the volume of the prism
Answer:
24 cm^3
Step-by-step explanation:
you do length times width times height.
Which complex number lies in the shaded triangle in this graph?
Answer: 1-i
Step-by-step explanation: If your in algebra 2 then this is the answer
There are 10 brown socks and 8 blue socks in a drawer. In the dark, you pull out a sock and put it on. Then you pull out another sock and put it on your other foot. What is the probability that you have on two blue socks?
Answer:
28 / 153 or around an 18.3% chance.
Step-by-step explanation:
P (b, b) = (total blue / total socks) × (total blue – 1 / total socks – 1) =
(8 / 18) × (7 / 17) = 56 / 306 = 28 / 153
john and jack divided there math homework.John solved twice as many problems as jack plus 1 more problem how many problems did each boy solve if there are 28 assigned problems?
Answer:
John: 19
Jack: 9
Step-by-step explanation:
Answer:
Jack = 9
John = 19
Step-by-step explanation:
Let the number that Jack solved = N
Then John solved 2N + 1
So
N + 2N + 1 = 28
3N = 28 - 1
3N = 27
N = 27 / 3 = 9 = number Jack solved
2(9) + 1 = 19 = number John solved
What is −183 ? Group of answer choices
a No answer choice is correct
b -5,832
c 5,832
Answer:
it is b because I did the problem yes it is b
which expression is equal to…
Answer:
4*0 (the last one)
Step-by-step explanation:
Please help!!
The Hiking Club plans to go camping in a State park where the probability of rain on any given day is 44%. What is the probability that it will rain on at most two of the seven days they are there? Round your answer to the nearest thousandth.
Answer: 0.336
Step-by-step explanation:
n=7
r=2,1,0
p=44%=0.44
q=1-0.44=0.56
7C2(0.44)^2(0.55)^5 +
7C1(0.44)^1(0.56)^6 +
7C0(0.44)^0(0.56)^7
Evaluate:
0.2239055109+
0.0949902167 +
0.0172709485
Sum: 0.33617= 0.336
What are four names for 3.09
Answer: Three and Nine Hundreths
3 9/100
309%
Step-by-step explanation:
i only know 3 sorry :(
Answer:
: Three and Nine Hundredths
: 3 9/100
: 309%
: 3 90/1000
Step-by-step explanation: These are some that I could think of. The last one is an equivalent fraction to the second one. I hope this helped.
lugar kung saan nanumpa si pang.quezon?
Answer:
Sa Corregidor nanumpa sai Pang. Quezon para sa kanyang ikalawang termino bilang pangulo ng pamahalaang komonwelt
20 points !! NEED HELP
What is the variable being tested in an experiment?
A. explanatory variable
B. placebo
C. response variable
D. control variable
Step-by-step explanation:
The dependent variable is the variable that is being measured or tested In an experiment.Answer:
explanatory variable
Step-by-step explanation:
Plato/Edmentum
Write 2,023 in word form
Answer:
Two thousand and twenty three
Step-by-step explanation:
Answer: Two and twenty-three thousandths
Step-by-step explanation:
50 POINTS !!
PLEASE HELP !! ILL GIVE BRAINLIEST TO THE RIGHT ANSWERS.
========================================================
Work Shown:
Apply the pythagorean theorem
a^2 + b^2 = c^2
12^2 + b^2 = 15^2
144 + b^2 = 225
b^2 = 225-144
b^2 = 81
b = sqrt(81)
b = 9
Answer:
9
I am not able to upload my answer unless its 20 characters long
i really need help with this, i dont get how to identify outliners and gaps stuff, please help?
On solving the provided question, we can say that - the plotting data will be done by 3 to 24 ; 6 to 61 ; 5 to 56; 1 to 15
what is plotting data?A graph that demonstrates the relationship between two or more variables is the most common way to depict a data set using a chart. Both hand-drawn and computer-drawn diagrams are acceptable. Start at the origin and move 2 units to the right before moving 3 units up to draw the coordinates for the point 2,3 on the coordinate plane. Make your points clear. As a result, the pink dot with the letter P on it denotes 2.3. A number line containing each value in your data collection should be first created before making a line chart. Then, on the number line, put an X (or dot) over each value of the data. Put an X over the number for each time a value appears in a record where it does.
so we have to plot data from the given data, we can do by
3 to 24 ; 6 to 61 ; 5 to 56; 1 to 15
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