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3 years ago

12

PLEASE DONT SKIP show all work

2 answers:

ra1l [238]3 years ago

6 0

Answer:

x=1±i√5

Step-by-step explanation:

the quadratic equation is in the form :

y=ax²+bx+c

y= 2x²-4x+12

x=(-b±√b²-4ac)/2a

x=-(-4)±√-4²-4(2)(12)/2a

x=4±√16-96/4

x=4±√-80/4

since the number under the square root then √-80=4i√5 ( assuming possitive numbers)

x=(4±4i√5)/4

x=4(1±i√5)/4

x=1±i√5

neonofarm [45]3 years ago

4 0

Answer:

i don't see nothing

Step-by-step explanation:

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Is this correspondence a function?

Afina-wow [57]

I’m not sure, sorry if I’m wrong but I’d say yes .

Explanation: A function is a correspondence between two sets where each element in the first set, called the domain, corresponds to exactly one element in the second set, called the range.
...

4 0

3 years ago

¿Cual es el error maximo que se puede cometer al medir el diametro de un circulo, cuya medida es 10 cm y la tolerancia debe ser

ZanzabumX [31]

Usando proporciones, hay que el error maximo que se puede cometer al medir el diametro de un circulo, en cm, es de $\pm 0.5$ .

<h3>¿Qué es una proporción?</h3>

Una proporción es una fracción de la cantidad total.

En este problema:

La cantidad total es el diametro de un circulo, cuya medida es 10 cm.

El erro maximo es de 5% de esto, o sea:

$\pm 0.05(10) = 0.5$

El error maximo que se puede cometer al medir el diametro de un circulo, en cm, es de $\pm 0.5$ .

Puede-se aprender más a cerca de proporciones en brainly.com/question/26395519

3 0

3 years ago

Three students have started a fence-painting business. Working together, Pragnesh and Qazi can paint the fence in 2 hours. Simil

vlada-n [284]

Answer: 55.4 mins

Step-by-step explanation:

pragnesh and qazi = 2hrs

pragnesh and roghui = 3hrs

qazi and roghui = 4hrs

this means for every 1 hour they wold paint.

pragnesh and qazi = $\frac{1}{2}$ half of the fence

pragnesh and roghui = $\frac{1}{3}$

qazi and roghui = $\frac{1}{4}$ quarter of the fence

time taken when they all work together

= $\frac{1}{2}$ + $\frac{1}{3}$ + $\frac{1}{4}$

= $\frac{13}{12}$

= $\frac{12}{13}$

= 0.9231 × 60(mins)

= 55.4 mins

8 0

3 years ago

Joe spends S3 per square foot on carpet for a square room. If he spends

Serjik [45]

Answer:

12 square feet

Step-by-step explanation:

You can find out how many square feet he bought by dividing 432 by 3.

432/3=144

Now, you need to find the square root of that to find the length of just one side of the room.

$\sqrt{144}=12$

4 0

3 years ago

Read 2 more answers

the volume V of a gas at a constant temperature varies inversely with the pressure P. when the volume is 100 cubic inches the pr

fiasKO [112]

Answer:

The pressure is $20\ psi$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent an inverse variation if it can be expressed in the form $y*x=k$ or $y=k/x$

In this problem we have

$V*P=k$

where

V is the volume of a gas at a constant temperature

P is the pressure

we have

For $V=100\ in^{3}$ , $P=25\ psi$

step 1

Find the value of k

substitute the values of V and P

$100*25=k$

$k=2,500$

The equation is equal to $V*P=2,500$

step 2

Find the pressure when the volume is 125 cubic inches

For $V=125\ in^{3}$

substitute in the equation and solve for P

$125*P=2,500$

$P=2,500/125=20\ psi$

8 0

3 years ago