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mart [117]
3 years ago
15

Eliminating by multiplying X+3y=1 -5x+4y=-24

Mathematics
1 answer:
gavmur [86]3 years ago
3 0

Answer:

y = -1         x = 4

Step-by-step explanation:

(X+3y=1) 5            Multiply this equation by 5 to cancel out the x

-5x+4y=-24

-5x + 4y= -24

+ 5x + 15y = 5       Add both equations together

19y = -19                Divide both sides by 19

y = -1

Plug -1 for y into one of the equations

x + 3(-1) = 1             Multiply 3(-1)

x - 3 = 1

 + 3 + 3                  Add 3 to both sides

x = 4  

If this answer is correct, please make me Brainliest!

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<img src="https://tex.z-dn.net/?f=%7Bx%7D%5E%7B%20log_%7B3%7D%28x%29%20%7D%20%20%3D%2081%20%7Bx%7D%5E%7B3%7D%20" id="TexFormula1
BlackZzzverrR [31]

Answer:

x=81 or 1/3

Step-by-step explanation:

x^\log_3(x)} =81x^3\\\log_3(x^{\log_3(x)})=\log_3(81x^3)\\\(\log_3x)(\log_3x)=\log_381+\log_3x^3\\(\log_3x)^2=3\log_3x^+4\\\\Let u=\log_3x\\\\u^2-3u-4=0\\(u-4)(u+1)=0\\u=4 \\4=\log_3x\\x=3^4=81\\\\u=-1\\-1=\log_3x\\x=3^{-1}=1/3

3 0
3 years ago
A furniture store has a chair originally priced at $76 on sale for $58 . what is the percent of decrease rounded to the nearest
neonofarm [45]
So here is how we are going to find the answer. Firstly, we deduct 58 from 76 and we got 18. The decrease is $18. Now, we are going to find out how many percent is 18 of 76. So we divide 18 by 76 multiplied by 100 and we get 23.7%. Hope this answers your question. Have a great day!
8 0
3 years ago
A baker decorates 42cupcakes in 30 minutes. She decorates cupcakes at a constant rate.
eimsori [14]

Answer: 1.4 min per min

Step-by-step explanation: sorry if wrong

8 0
2 years ago
What is 45=m(25)+b solving for m
STatiana [176]

Answer:

\frac{45-b}{25}

Step-by-step explanation:

given

45 = 25m + b ( isolate the term in m by subtracting b from both sides )

45 - b = 25m ← divide both sides by 25

\frac{45-b}{25} = m

7 0
3 years ago
1/3x + y = 4<br> (what is Y)
Arada [10]

Answer:

y=4-1/3x

Step-by-step explanation:

1/3x+y=4

y=4-1/3x

3 0
3 years ago
Read 2 more answers
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