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3 years ago

Which of the following is not a quadratic equation?

Mathematics

1 answer:

valina [46]3 years ago

8 0

Answer:

In this equation x² + 3x - 2 = x² - 2x is not a quadratic equation.

Step-by-step explanation:

The equation which contains x² term (In simplified form), then only we can apply quadratic formula.(i.e equation is quadratic)

A. ax² + bx = 0,

Yes , Since x² term is present here ,so we can use quadratic formula.

B. 3x² = -4x - 1

We can simplify this,

i.e 3x² + 4x + 1 = 0

Since x² term is present here ,so we can use quadratic formula.

C. x² = 5

Yes , Since x² term is present here ,so we can use quadratic formula.

D. x² + 3x - 2 = x² - 2x

We can simplify this,

x² - x² + 3x + 2x - 2 = 0

or 5x - 2 = 0

Since x² term is not here ,so we can not use quadratic formula.

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-2 (-7k + 4) + 9 = -13

Vika [28.1K]

<span>-2 (-7k + 4) + 9 = -13
Use distributive property
14k - 8 + 9 = -13
Add 8 to both sides
14k + 9= -5
Subtract 9 from both sides
14k= -14
Divide 14 on both sides
Final Answer: k= -1</span>

5 0

3 years ago

Read 2 more answers

2. When a person is selected at random from a very large population, the probability that the selected person is righthanded is

raketka [301]

Answer:

a) 0.5514

b) 0.0058

Step-by-step explanation:

Data provided in the question:

Probability that the the selected person is righthanded, P(R) = 0.82

Therefore,

Probability that the the selected person is not righthanded, P(R') = 1 - 0.82

= 0.18

Now,

a. They are all right-handed

P (They are all right-handed) = P(R) × P(R) × P(R)

= 0.82 × 0.82 × 0.82

= 0.5514

b) None of them is right-handed

P (None of them is right-handed) = P(R') × P(R') × P(R')

= 0.18 × 0.18 × 0.18

= 0.0058

4 0

3 years ago

The polynomial equation x6 - 16x2 - 4x4-64 has complex roots #2;. What are the other roots? Use a graphing calculator and

Semenov [28]

The answer is -1,1 thank me later !

6 0

3 years ago

What is the area of the trapezoid?<br>

givi [52]

Answer:100 m^2

Step-by-step explanation:

Area of trapezoid is shown in the equation

Area = (a x b)/ h where a and b are the bases of the trapezoid and h is the height.

In this problem, a = 8, b=12, and h=10 so area is calculated to be:

A=(8x12)/10 = 100

3 0

3 years ago

Diego predicts that his basketball team has a 23 probability of winning each of their next 7 games. Select two ways Diego could

iVinArrow [24]

Answer:

Step-by-step explanation:

Given

$Pr = \frac{2}{3}$

Required

Which 2 options can be used to simulate the given probability.

The two options are (c) and (e)

The proof is as follows;

Option (c)

We have:

$Rolls = 7$

A cube has 6 faces. So:

$S = \{1,2,3,4,5,6\}$

$n(S)=6$

The probability of getting ones, twos, threes, and fours is:

$Pr = \frac{n(1,2,3,4)}{n(S)}$

In: $S = \{1,2,3,4,5,6\}$

$n(1,2,3,4) = 4$

So:

$Pr = \frac{4}{6}$

Simplify

$Pr = \frac{2}{3}$

Option (e)

We have:

$White = 10$

$Red = 5$

$Count = 7$

Record the probability of white.

This is calculated as:

$Pr = \frac{White}{Total}$

$Pr = \frac{White}{White + Red}$

$Pr = \frac{10}{10+5}$

$Pr = \frac{10}{15}$

Simplify

$Pr = \frac{2}{3}$

6 0

3 years ago