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elena55 [62]
3 years ago
15

What is the solution of the system of equations? 2x-y=7 Y=2x+3

Mathematics
1 answer:
Arturiano [62]3 years ago
4 0

Answer:

No solution

Step-by-step explanation:

2x -y =7

y= 2x +3

  1. Substitute the y value. <em>2x-(2x+3)=7 or 2x -2x-3=7 </em>
  2. Eliminate opposites <em>2x <u>-2x</u>-3=7 >>>> -3=7</em>
  3. Answer <em>-3= 7</em> ( false)
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Expand and simplify (x-3)(2x+1)(x+1)
Vladimir [108]

Answer:

2 3 − 3 2 − 8 − 3

Step-by-step explanation:

6 0
3 years ago
Suppose the population of a town is 19,000 and is growing 2% each year. What will the population be after 11 years?
vitfil [10]
123500
I think the answer is 123500
4 0
3 years ago
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Darren wanted to see how contagious yawning can be. To better understand this, he conducted a social experiment in which he yawn
denis23 [38]

Answer:

10.5 minutes

Step-by-step explanation:

Thinking about the problem

The modeling function is of the form P(t)=A⋅Bf(t), where B=4B=4B, equals, 4 and f(t)=\dfrac{t}{10.5}f(t)=

10.5

t

​

f, left parenthesis, t, right parenthesis, equals, start fraction, t, divided by, 10, point, 5, end fraction.

Note that each time f(t)f(t)f, left parenthesis, t, right parenthesis increases by 111, the quantity is multiplied by B=4B=4B, equals, 4.

Therefore, we need to find the ttt-interval over which f(t)f(t)f, left parenthesis, t, right parenthesis increases by 111.

Hint #22 / 3

Finding the appropriate unit interval

fff is a linear function whose slope is \dfrac{1}{10.5}

10.5

1

​

start fraction, 1, divided by, 10, point, 5, end fraction.

This means that whenever ttt increases by \Delta tΔtdelta, t, f(t)f(t)f, left parenthesis, t, right parenthesis increases by \dfrac{\Delta t}{10.5}

10.5

Δt

​

start fraction, delta, t, divided by, 10, point, 5, end fraction.

Therefore, for f(t)f(t)f, left parenthesis, t, right parenthesis to increase by 111, we need \Delta t=10.5Δt=10.5delta, t, equals, 10, point, 5. In other words, the ttt-interval we are looking for is 10.510.510, point, 5 minutes.

Hint #33 / 3

Summary

The number of people who yawned quadruples every 10.510.510, point, 5 minutes.

7 0
3 years ago
What is 11x - 3 = 5x + 11
astra-53 [7]
11x - 3 = 5x + 11

11x - 5x = 11+3
6x = 14
x = 14/6 =7/3
3 0
3 years ago
Simi bought a study table for $ 9000. She sold it at a profit of 20%. How much profit did she make? What is the selling price?
pashok25 [27]

Answer:

cost price of a table=$9000

profit%=20%

Let profit be x

to find profit use formula,

profit%=profit/cost price*100

20%=x/$9000*100

20*$9000=100x

$180000/100=x

$1800=x

Now to find selling prie os a table use formula,

cost price +profit

$9000+$1800

$91800

therefore selling price of a table is $91800

Step-by-step explanation:

Hope this helps u!!

4 0
2 years ago
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