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2 years ago

What is the discriminant of the equation 3x^2-4=2x

Mathematics

1 answer:

elixir [45]2 years ago

5 0

<h3><u>Answer</u> :</h3>

Given equation : 3x² - 4 = 2x

We have to find discriminant of the equation $.$

⭆ 3x² - 4 = 2x

⭆ 3x² - 2x - 4 = 0

By comparing this equation with ax²+bx+c, we get

a = 3
b = -2
c = -4

Discriminant (D) = b² - 4ac

⭆ D = (-2)² - 4(3)(-4)

⭆ D = 4 + 48

⭆<u> D = 52</u>

<h3>Hope It Helps!</h3>

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Two sides of a triangle are as follows: 2 centimeters and 5 centimeters. Describe the possible lengths of the third side

Elden [556K]

Answer:

3cm < Third side < 7cm

Thus third side can take any value between 3cm and 7 cm

(note: excluding 3 cm and 7 cm)

If the value are integral then possible values of third side are

4cm, 5cm,6cm

Step-by-step explanation:

This question can be solved using given by Triangle Inequality Theorem Given below.

Sum of two sides is always greater than value of third side
Difference of two sides is always less than value of third side

Given two sides are 2cm, 5cm

Sum of two sides = (2+5)cm = 7 cm

Difference of two sides = (5-2) = 3 cm

Let the third side be X

thus according to Triangle Inequality Theorem

X < Sum of two sides of given triangle

X < 7cm -----1

X > Difference of two sides

X > 3cm ----1

combining expression 1 and 2 we have

3cm < X < 7cm

Thus third side can take any value between 3cm and 7 cm

(note: excluding 3 cm and 7 cm)

If the value are integral then possible values are

4c, 5cm,6c

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2 years ago

Select the fraction equivalent to 0.1¯

Readme [11.4K]

Answer:

its 1/10

Step-by-step explanation:

You are wrong because 0.1 x 10 is 1 just like 1/10 x 10 is 1.

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2 years ago

Which expression represents twice a number, n, increased by 7?

Whitepunk [10]

Answer:

2n + 7

Step-by-step explanation:

'2 twice a Number N' , Is 2n

'Increased By 7' Add 7 .

That Will be Your Answer! Please Rate Brainiest!

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2 years ago

Read 2 more answers

Pls someone help me with this, and fast pls

Inga [223]

Answer:

212.5

Step-by-step explanation:

25x17=425

425/2=212.5

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2 years ago

If a certain machine makes electrical resistors having a mean resistance of 40 ohms and a standard deviation of 2 ohms, what is

Anna71 [15]

Answer:0.0668

Step-by-step explanation:

Given

mean of sample $\mu =40$

Standard deviation $\sigma =2$

For $n=36$ sample

Random variable $Z=\frac{X-\mu }{\frac{\sigma }{\sqrt{n}}}$

For combined resistance of 1458 ohm mean resistance of $\mu =\frac{1458}{36}=40.5$

$P(40.5$

$=P(\frac{40.5-40}{\frac{1}{3}}$

$=P(1.5$

$=1-P(Z\leq 1.5)$

$=1-0.9332$

$=0.0668$

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2 years ago