3x + 2y = -7
2x - 5y = 8
please help solve!! i need my work need to me shown so please help me! ❤️
Answers
Answer:
56/19
Step-by-step explanation:
I'll approach this using Substitution. Since 3X = 2Y, we know that 1.5X = 1Y. We can plug that into the first equation, which gives us...
2X + 5(1.5X) = 8
2X + 7.5X = 8
9.5X = 8
19X = 16
X = 16/19
While this is not 'pretty', it does match up with how most of the answers are written (four of the answers involve "nineteenths"). With this value of X, we can solve for Y...
3X = 2Y
3(16/19) = 2Y
48/19 = 2Y
24/19 = Y
With the value of X and the value of Y, we can answer the question that's asked:
2X + Y = ?
2(16/19) + 24/19 =
32/19 + 24/19 =
56/19
Final Answer: 56/19
Answer:
[tex]x = - 1[/tex]
[tex]y = - 2[/tex]
Step-by-step explanation:
[tex]3x + 2y = - 7[/tex]
[tex]2x - 5y = 8[/tex]
Apply elimination method. Let multiply the bottom equation by -3/2.
[tex]2 \times - \frac{3}{2} x = - 3[/tex]
[tex] - 5 \times - \frac{3}{2} = 7.5[/tex]
[tex]8 \times - \frac{3}{2} = - 12[/tex]
Substitute new equation and add it to the top equation
[tex]3x + 2y = - 7[/tex]
[tex] - 3x + 7.5y = - 12[/tex]
[tex]9.5y = - 19[/tex]
[tex]y = - 2[/tex]
Now plug -2 for y into any equation and solve for x.
[tex]3x + 2( - 2) = - 7[/tex]
[tex]3x - 4 = - 7[/tex]
[tex]3x = - 3[/tex]
[tex]x = - 1[/tex]
Related Questions
In the year 2006, a person bought a new car for $24000. For each consecutive year after that, the value of the car depreciated by 10%. How much would the car be worth in the year 2010, to the nearest hundred dollars?
Answers
Answer:
$15,746.400
Step-by-step explanation:
The computation of the car value in the year 2010 is shown below:
Since the new car brought in the year of 2006 at $24,000
And, it would be depreciation by 10%
So, in the year 2010 the car value would be
= $24,000 × (1 - 0.10)^4
= $24,000 × 0.9^4
= $15,746.400
Can someone please help me !!
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(3a + 2)(a + 3)
Step-by-step explanation:
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015
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Answers
Your welcome:)
Hope this help?
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Answers
2. Find the factors of 60.
3. You should come up with a common factor which is a common number listed for both 40 and 60.
Answer:
20x
Step-by-step explanation:
1) Identify commonalities in the numbers at hand (x + 40 divisible by 1, 2, 4, 5, 8, 10, 20, 40 and 60 divisible by 1,2,3,4,5,6,10,12,15,20,30,60) overlap is x and 1,2,4,5,10,20) 20 is the highest factor and x is the only factor.
2) put them together GCF: 20x
Question 6
An environmental group volunteers to pick up trash along a road that is
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milelong. The volunteers divide the road to 4 sections adams that each section of the roads
5
4
Yes How
Answers
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23
Step-by-step explanation:
is the answer to the problem
WILL GIVE BRAINLIEST
Answers
Answer:
10 units
Step-by-step explanation:
You can create point c at (3,4) to make a right triangle
Then you know that the 2 legs are 6 and 8
We need to find the hypotenuse
You can use pythagorean theorem:
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:)
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Answers
Answer: 0.73
Step-by-step explanation:
Answer:0.73
Step-by-step explanation: none the answer is right
what's the answer ?
[tex] \frac{ \sqrt{225} }{ \sqrt{} 25} [/tex]
Answers
Answer:
Hello.....
15/5
Step-by-step explanation:
thanks
Answer:
3
Step-by-step explanation:
here's your solution
=>. first u have to find out the root of 225
which is 15
=> and also root of 15 which is 5
=> now,we have to divide 15 by 5
=> hence, answer is 3
hope it helps
A certain bacteria can double in 6 hours. How long will it
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Answers
Answer:
it can go to 160 on in 18 hours so the the answer could be 26 hours
fleas have six legs are five fleas on the dog in 3 fleas on the cat how many legs are there altogether
Answers
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Step-by-step explanation:
Answer:
48 legs
Step-by-step explanation:
5 times 6 equals 30
3 times 6 equals 18
2. Jada saw a music video that her favorite artist recently posted online. The equation
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a. Find v(-2)
Answer:
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Answer:
Answers
Answer:
A. V=-640
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Step-by-step explanation:
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Answers
Step-by-step explanation:
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Answer:
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Step-by-step explanation:
Situation one: Multiply the numbers. Paranthesis are not needed as multiplication is communitive, which leads me to believe they are factors written out in that form for some reason, cit. possibility two.
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Answers
Answer:
6 is 24% of 25
Step-by-step explanation:
Ur welcome :)
Hope u have a good day
A pair of sneakers is regularly at $52. The store sells it for $78. What is the percent increase?
A. 33.33% B. 50% C. 5%
Answers
The answer is A.33.33%.
A pond contains 3,000,000 liters of water. How is this number written in scientific notations?
Answers
So bassically I have to write this as it is too short, but the answer is = 3 x 10^7
The given number 3,000,000 written in scientific notations is [tex]3\times10^6[/tex].
Given that, a pond contains 3,000,000 liters of water.
What is scientific notation?Scientific notation is a method for expressing a given quantity as a number having significant digits necessary for a specified degree of accuracy, multiplied by 10 to the appropriate power such as 1.57×10³.
The given number written in scientific notations is
3,000,000 = [tex]3\times10^6[/tex]
Therefore, the given number 3,000,000 written in scientific notations is [tex]3\times10^6[/tex].
To learn more about the Scientific notation visit:
https://brainly.com/question/18073768.
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Answers
Answer:
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Step-by-step explanation:
Hope this helps, let me know if im correct
Answer:
√{66+15}=√81=√9²=±9 is your answer
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Answers
Answer:
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Step-by-step explanation:
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The relevant formulas are ...
A = (1/2)(b1 +b2)h . . . . . . area of a trapezoid
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__
Here, the trapezoid has bases 12 and 2, and height 12, so its area is ...
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The triangle has a base of 4 and a height of 2, so its area is ...
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Then the area of the desired figure is ...
84 - 4 = 80 . . . . square units
The sum of two numbers is 68. Their difference is 15. Write a system of equations you could use to solve this problem.
Answers
Answer:
x+y=68
x-y=15
Step-by-step explanation:
A "sum" means that we will be using addition, while a "difference" indicates subtraction. Anytime we have two unknown numbers we generally use "x" and "y".
plz solve this
1. 12/11 , 108/99
2. 1.5/9 , 1/6
3. 3/11 , 15/66
4. 1.7/1.2 , 2.9/2.4
and Determine whether each pair of ratios are equivalent ratios. Write yes or no.
Answers
Answer:
1. yes
2. no
3. yes
4. no
Step-by-step explanation:
(1/5 x 5)^5 help please
Answers
Answer:
=1
Step-by-step explanation:
i hope this helps :)
solve for x
a) -11
b) -10
c) 11
d) 10
Answers
Explanation:
4(10) + 11 = 51
5(10) + 1 = 51
The two angles are adjacent so they have to be equal
Hope this helps :)
A box has a volume of 20 cubic inches. If the base has dimensions of 2 inches by 4 inches, what is the height of the box?
Answers
Answer:
h = 2.5 in
Step-by-step explanation:
v = bwh
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h = 2.5 in
Question
Type the forest answer in the box
A pack of 12 sedas costs $5,04 What is the unit rate in dollars per soda/
The unit rate in dollars per soda is
Answers
I need help very fast please !
Answers
Answer:
Contents of this laser is 0.744 um and is a concise description of many of the in struments used in
Step-by-step explanation:
1.Introduction for the Royal College of Ophthalmologists and Ophthalmologists and I will #ثوره_طلابية غاضبة على قرار وزاره التعليم العالي باصدارها القرار المجحف وعليه يبداء من الان الاعتصام الطلاب #والاضراب_عن_الدوام لحين تحقيق المطالب.
تعليم الكتروني = امــتـحـان الكتروني
تعليم حضوري = امــتـحـان حضوري07725134341
I’ll give Brainliest I need help please & thanks
Answers
..—————————————————————
Evaluate 18 + 2y, when y= 7
Answers
Answer:
32
Step-by-step explanation:
18 +2(7).
2 x 7 = 14
18 + 14 = 32.
Which expression is equivalent to sqrt48x^5 if x>0
Answers
sqrt 48 = 4 sqrt 3
sqrt (x^5) = sqrt x^4 . sqrt x
= (x^4)^1/2 . sqrt x
= x^2 . sqrt x
= 4 . sqrt 3 . x^2 . sqrt x
= 4x^2 sqrt 3x (C)
Answer:
sqrt (48x^5) if x>0
. implies multiplication
48 = 2. 2.2.2.3= 2^4 .3
sqrt [2^4 .3 (x^5) ] if x>0
sqrt [2^4 ] sqrt [3 ] sqrt [(x^5) ] if x>0
sqrt [16 ] sqrt [3 ] sqrt [(x^5) ] if x>0
4. sqrt [3 ] sqrt [(x^5) ] if x>0
We know, sqrt [(x^5) ] if x>0 = x^2. sqrt [(x) ]
4. sqrt [3 ] .x^2. sqrt [(x) ] if x>0
4x^2 sqrt[3x] (answer c)
Step-by-step explanation:
The mean of six numbers is 14. If one of the six numbers is removed, the mean becomes 5. What is the value of the number removed?
Answers
Answer:
Remember, the mean is calculated by adding the scores together and then dividing by the number of scores you added. In this case, the mean would be 2 + 4 (add the two middle numbers), which equals 6. Then, you take 6 and divide it by 2 (the total number of scores you added together), which equals 3.
Step-by-step explanation:
Hope I helped.It's just a reminder of helpful things for means!
Answer:
59
Step-by-step explanation:
Suppose a, b, c, d, e and f represent the 6 numbers.
Then, [tex]\frac{a + b + c + d + e + f}{6} = 14\\[/tex]
(1) a + b + c + d + e + f = 84
Let's remove f
then [tex]\frac{a + b + c + d + e}{5} = 5[/tex]
(2) a + b + c + d +e = 25
Substitute 25 in for a + b + c + d +e in equation (1)
We have 25 + f = 84
f = 59