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4 years ago

What are the real numbers for x^2-3x+8=0

Mathematics

1 answer:

Zanzabum4 years ago

8 0

Answer:

Has no real solution (only imaginary solutions)

Step-by-step explanation:

x²-3x+8=0

recall for a quadratic equation in the form

ax² + bx + c = 0

the if b²- 4ac is negative (i.e less than zero), then the equation has no real solutions.

in this case,

a=1, b = -3 and c=8

b²- 4ac,

= (-3)² - (4)(1)(8)

= 9 - 32

= - 23 (negative number hence no real solutions)

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A company wants to decrease their energy use by 16%.if their electric bill currently 2,2000 a month what will their be if they a

lyudmila [28]

The bill will be 18,480 if they are successful.

Step-by-step explanation:

Given,

Current bill of company = 22000

Energy usage to decrease = 16%

Amount of decreased usage = 16% of current bill

Amount of decreased usage = $\frac{16}{100}*22000$

Amount of decreased usage = $0.16*22000$

Amount of decreased usage = 3520

Bill after decreased usage = Current bill - Amount of decreased usage

Bill after decreased usage = 22000 - 3520 = 18480

The bill will be 18,480 if they are successful.

Keywords: percentage, subtraction

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3 years ago

If a rectangle or prism has a volume of 432 in.³ and the height of the prism is 9 inches what are the dimensions of the base

Deffense [45]

You first do 432 divided by 9 which is 48. However, there could be multiple dimensions for the base because 48 is a composite number. One example could be 6 by 8

4 0

3 years ago

Which of the following expressions are equivalent to 7.2 ÷ -8.1 ÷ -3.7?

Inessa05 [86]

Step-by-step explanation:

7.2 / (-8.1) / (-3.7) = Positive

A = (-7.2) / (-8.1) / (-3.7) = Negative

B = (-7.2) / (8.1) / (3.7) = Negative

Hence the answer is C, none of the above.

3 0

3 years ago

Complete the table for y=1/2x-3

Readme [11.4K]

Tables are created by substitute a set of input values into the function to create outputs. The required table is as shown below

<h3>Tables and values</h3>

Tables are created by substitute a set of input values into the function to create outputs

Using x = 0, 1 and 2 as the input values

Given the function

y = 1/2x - 3

If x = 0

y = 1/2(0) - 3

y = -3

If x = 1

y = 1/2(1) - 3

y = -2.5

If x = 2

y = 1/2(2) - 3

y = -2

Hence the required table is as shown below

x | y

0 -3

1 -2.5

2 -2

Learn more on tables and values here: brainly.com/question/12151322

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2 years ago

What is the best approximation for the value of √140?

laila [671]

Answer:

the best approximation is 2√35

Step-by-step explanation:

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3 years ago