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4 years ago

What is true when a system of equations has no solutions?

Mathematics

1 answer:

tatiyna4 years ago

3 0

Answer:

I wanna say B, but I really suck at this

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Solve 2x^2 - 7x - 15 = 0. <br> a, (3/2,-5)<br> b (-3/2,5)<br> c ()

Brut [27]

For this case we must solve the following quadratic equation:

$2x ^ 2 -7x -15 = 0$

We must apply the following formula:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

We have to:

$a = 2\\b = -7\\c = -15$

Substituting we have:

$x = \frac {- (- 7) \pm \sqrt {(- 7) ^ 2-4 (2) (- 15)}} {2 (2)}\\x = \frac {7 \pm \sqrt {49 + 120}} {4}\\x = \frac {7 \pm \sqrt {169}} {4}\\x = \frac {7 \pm13} {4}$

Thus, the solutions are:

$x_ {1} = \frac {7 + 13} {4} = \frac {20} {4} = 5\\x_ {2} = \frac {7-13} {4} = \frac {-6} {4} = - \frac {3} {2}$

ANswer:

$x_ {1} = 5\\x_ {2} = - \frac {3} {2}$

4 0

3 years ago

What is one tenth of 0.5

USPshnik [31]

The answer is 0.05 !!!!!!!

7 0

4 years ago

Read 2 more answers

The store owner tells the girls that half of the DVDS are out on loan. How many DVDS does the store own in total?

patriot [66]

Step-by-step explanation:

i need help to

3 0

2 years ago

10) pls help i’ll give 20 points :)

NikAS [45]

Answer: The blank space in the equation is 4.

Step-by-step explanation: -6 x +2 is -12. -48/-12 is 4. Therefore, the blank space in the equation is 4.

3 0

3 years ago

Divide. 46 532 Enter your answer by filling in the boxes

Tju [1.3M]

Answer:

11.5652173913

Step-by-step explanation:

You might have to round

8 0

3 years ago