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2 years ago

11

Which quadratic equation has roots - 2 and 1/5 :

1 answer:

Sladkaya [172]2 years ago

7 0

Answer:

$5 {x}^{2} \: + \: 8x \: - 2 \: = \: 0$

Step-by-step explanation:

$sum \: of roots = - 2 + \frac{1}{5} = - \frac{8}{5} \\ product \: of \: roots = - 2 \times \frac{1}{5} = - \frac{2}{5} \\ from \: general \: equation \\ a {x}^{2} + bx + c = 0 \\ {x}^{2} + \frac{8}{5} x \: - \frac{2}{5} = 0 \\ 5 {x}^{2} \: + \: 8x \: - 2 \: = \: 0$

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The price of an item increased from 20 to 30. The percentage of increase is pls help me I have exam after a week pls I hope you

Veronika [31]

Answer: 50% increase

Step-by-step explanation:

Think of 20 as 100%

Half of 20 is 10 which is 50% in this scenario.

30-20=10

This means that the price of the item increased by 50% or 10.

6 0

2 years ago

Today only, a desk is being sold at a 35% discount. The sale price is $611.

vaieri [72.5K]

The price was $824.85 before the discount (yesterday)

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3 years ago

The box and whisker plots below show two classes' semester grades. Write a paragraph comparing the two sets of

oksano4ka [1.4K]

The paragraph to show the comparision between two classes semester grades on the basis of the terms

extremes
quartiles
medians
ranges

is given below:

<h3>What is Box and Whisker plots?</h3>

A box and whisker plot is defined as a graphical method of displaying variation in a set of data.

From the first figure, write all the values where dark point is drawn

53, 62, 80, 86, 89

The lower extreme is the smallest value, which is 53.

The upper extreme is the highest value, which is 89.

The median will be the middle of data , which is 80

The upper quartile is the median of the upper region and the lower quartile is the median of the lower region.

The upper quartile is 86 and the lower quartile is 62.

Range of the data be,

= Highest - Lowest

=89-53

=36

From the second figure, write all the values where dark point is drawn

56, 62, 74, 89, 96

The lower extreme is the smallest value, which is 56.

The upper extreme is the highest value, which is 96.

The median will be the middle of data , which is 74.

The upper quartile is the median of the upper region and the lower quartile is the median of the lower region.

The upper quartile is 89 and the lower quartile is 62.

Range of the data be,

= Highest - Lowest

=96-62

=34

From the above discussion,

The First class have less upper extreme value than the second class.
The First class have less lower extreme value than the second class.
The First class have greater median than the second class.
The First class have less upper quartile than the second class.
The First and second class have equal lower quartile.
The First class have greater range than the second class.

The comparision of the two classes on the basis of extremes, quartile, median, range is concluded above.

learn more about box and whisper plot here:

brainly.com/question/11859288

#SPJ1

6 0

1 year ago

Simplify <img src="https://tex.z-dn.net/?f=%28r%5Cfrac%7B1%7D%7B2%7D4" id="TexFormula1" title="(r\frac{1}{2}4" alt="(r\frac{1}{2

Katena32 [7]

Hello!!

════ ⋆★⋆ ════

$\mathbb{A~N~S~W~E~R~:}$

$= r$ · $2$

➡ $\Huge \sf \mathbb \color{}\underline{\colorbox{ANSWER~WITH~EXPLANATION ~!}{}}$

$\mathfrak{apply~the~fraction~rule: }$ $a$ $\frac{b}{c} =\frac{a~. ~b }{c}$

$\mathfrak{apply~rule: }$ $a$ · $1 = a$

$r$ · $1$ · $4 = r$ · $4$

$=\frac{r~.~4}{2}$

$\mathfrak{divide~the~numbers~: }$ $\frac{4}{2} = 2$

$= r$ · $2$

So, your answer will be is :

$= r$ · $2$

$\color{}{Hope\:it\:helps. ..}$

#LearnWithBrainly

$\mathbb{A~N~S~W~E~R~:}$

$\mathfrak{Jace}$

4 0

3 years ago

Find the perimeter of a square equal in area to two squares whose sides are 12 m and 5 m respectively

KatRina [158]

Formula for perimeter a+b+a+b

12+5+12+5= 17+17= 34 .34=P

5 0

3 years ago