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makkiz [27]
3 years ago
14

Which of the following equations has no solution? 3x+1=2x+1 3x+1=3x+1 3x+1=3x+2

Mathematics
2 answers:
Olenka [21]3 years ago
5 0
3x + 1 = 3x + 2 has no solution.
vladimir2022 [97]3 years ago
4 0
The last equation has no real solution.
The second one has an infinite number.
The first equation has 0 as its only solution.
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What are the roots to<br> the equation<br> 2x² + 6x-1=0?
lys-0071 [83]

Answer:

The roots of  equations are as m =  \frac{-3}{2} + \frac{\sqrt{11} }{2}  And n =  \frac{-3}{2} - \frac{\sqrt{11} }{2}    

Step-by-step explanation:

The given quadratic equation is 2 x² + 6 x - 1 = 0

This equation is in form of a x² + b x + c = 0

Let the roots of the equation are ( m , n )

Now , sum of roots = \frac{ - b}{a}

And products of roots = \frac{c}{a}

So, m + n = \frac{ - 6}{2} = - 3

And m × n =  \frac{ - 1}{2}

Or, (m - n)² = (m + n)² - 4mn

Or, (m - n)² = (-3)² - 4 (\frac{ - 1}{2})

Or, (m - n)² = 9 + 2 = 11

I.e m - n = \sqrt{11}

Again m + n = - 3    And m - n = \sqrt{11}

Solving this two equation

(m + n) + ( m - n) = - 3 + \sqrt{11}

I.e 2 m =  - 3 + \sqrt{11}

Or, m = \frac{-3}{2} + \frac{\sqrt{11} }{2}

Similarly n =  \frac{-3}{2} - \frac{\sqrt{11} }{2}      

Hence the roots of  equations are as m =  \frac{-3}{2} + \frac{\sqrt{11} }{2}  And n =  \frac{-3}{2} - \frac{\sqrt{11} }{2}      Answer

6 0
3 years ago
80 cm to 42.5 cm for percent change
Fofino [41]

Answer:

= 46.875% decrease

Step-by-step explanation:

Mark as brainliest :)

5 0
3 years ago
Which of the following phrases can be used to represent -11? the opposite of -11 eleven greater than zero eleven below zero posi
Rama09 [41]

Answer:

the opposite of -11 eleven greater than zero eleven below zero positive eleven

Step-by-step explanation:

5 0
3 years ago
Plz help<br><br> (2x/0.25)−0.525=7.475<br><br> what's x?
Jlenok [28]

Answer:

i used calculator and got 1

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Answer for 23 plz plz plz
den301095 [7]

Answer:

A₍ₙ₎ = - 74 + (n-1) x 6

Step-by-step explanation:

A₍ₙ₎ = A₍₁₎ + (n-1) x d

A₍₁₈₎ = 28 = A₍₁₎ + 17 x d  ..... (1)

A₍₄₀₎ = 160 = A₍₁₎ + 39 x d  .....(2)

(2)-(1)    132 = 22d

d = 6

A₍₁₎ = 28 - 17 x 6 = -74

formula: A₍ₙ₎ = - 74 + (n-1) x 6

3 0
3 years ago
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