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2 years ago

Write an irrational number that can be added to the irrational number √28 to get a rational sum of 8.

Mathematics

1 answer:

tamaranim1 [39]2 years ago

7 0

Answer: 2.82

Step-by-step explanation:

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When 0.3(4x – 8) – 0.5(–2.4x + 4) is simplified, what is the resulting expression?

andrew11 [14]

Answer:

2.4x - 4.4

Step-by-step explanation:

0.3(4x – 8) – 0.5(–2.4x + 4)

1.2x - 2.4 + 1.2x -2

2.4x - 4.4

8 0

3 years ago

Give the properties for the equation -2x 2 - y + 10x - 7 = 0.

Sladkaya [172]

Given:

The quadratic equation is

$-2x^2-y+10x-7=0$

To find:

The vertex of the given quadratic equation.

Solution:

If a quadratic function is $f(x)=ax^2+bx+c$ , then

$Vertex=\left(\dfrac{-b}{2a},f(\dfrac{-b}{2a})\right)$

We have,

$-2x^2-y+10x-7=0$

It can be written as

$-2x^2+10x-7=y$

$y=-2x^2+10x-7$ ...(i)

Here, $a=-2,b=10,c=-7$ .

$\dfrac{-b}{2a}=\dfrac{-10}{2(-2)}$

$\dfrac{-b}{2a}=\dfrac{-10}{-4}$

$\dfrac{-b}{2a}=\dfrac{5}{2}$

Putting $x=\dfrac{5}{2}$ in (i), we get

$y=-2(\dfrac{5}{2})^2+10(\dfrac{5}{2})-7$

$y=-2(\dfrac{25}{4})+\dfrac{50}{2}-7$

$y=\dfrac{-50}{4}+25-7$

$y=\dfrac{-25}{2}+18$

On further simplification, we get

$y=\dfrac{-25+36}{2}$

$y=\dfrac{11}{2}$

So, the vertex of the given quadratic equation is $\left(\dfrac{5}{2},\dfrac{11}{2}\right)$ .

Therefore, the correct option is A.

3 0

3 years ago

Solve 2(x + 1) = 2x + 2.<br> A All real numbers<br> B No solution<br> C 0<br> D 1

FrozenT [24]

2(x+1)=2x+2 if you factor the right side ..

2(x+1)=2(x+1)

This is always true for any value of x so there are infinitely many solutions...

x= all real numbers.

6 0

3 years ago

Read 2 more answers

WORTH 100 POINTS. WILL GIVE BRIANLIEST. Six contestants on a reality TV show were stunned to find their lowest scoring colleague

Brut [27]

Answer:

8 The victim wasn't mauled by a cougar - Clue 1

20 Dr. Alpha was in the kitchen cooking - Clue 2

-12 The victim had no venomous bites - Clue 3

72 Miss Beta was at the movie theater - Clue 4

14 The victim wasn't electrocuted - Clue 5

14 Coach Omega was sleeping at the atrium - Clue 6

-8 The murder did not include a firearm - Clue 7

-12 Mrs.Gamma was doing yoga at the gym - Clue 8

169 The murder wasn't drowning - Clue 9

-274 Mr.Epsilon was swimming laps at a pool - Clue 10

is what i know, i will figure out in a bit! :D

Step-by-step explanation:

6 0

2 years ago

Can somebody help me please

klio [65]

Answer:

im not 100% but i think its

T= 2t-4+(t-4)+7

6 0

2 years ago