All categories

3 years ago

Question

Mathematics

1 answer:

tester [92]3 years ago

6 0

Answer:

Ø.

Step-by-step explanation:

Given the equation 7x^2 = -14. We are to find the value of x;

7x^2 = -14.

Divide both sides by 7

7x^2/7 = -14/7

x² = -2

Square root both sides

√x² = ±√-2

x = ±√2 i

The value of x is (-√2 i, √2 i)

Since there values is a complex values, hence there is no real solution. The answer is Ø.

You might be interested in

Find amount of water displaced by solid spherical ball of diameter 28 cm

leva [86]

Answer:

11494.04cm³

Step-by-step explanation:

Volume of a sphere

V = 4/3πr³

you got a diameter of 28cm, so half of taht is the radius.

r = 14cm

plug in and solve

V = 4/3πr³

= 4/3π(14)³

= 11494.04cm³

3 0

3 years ago

Please help with number 3

diamong [38]

Answer:

6/8 y=79

my id has now been sent off

7 0

3 years ago

A student records the feather colors and beak shapes of every bird observed in a park. What kind of data is the student recordin

Sav [38]

Answer:

the feather colors and beak shapes of every bird observed in a park.

Step-by-step explanation:

you said it in your question

4 0

3 years ago

Find the area between the graph of the given function and the x-axis over the given interval, if possible.

icang [17]

Answer:

Not possible to find out area

Step-by-step explanation:

Given is an exponential function as

$f(x) =e^{-x}$ and we have to find the area to the left of e above x axis under the curve.

Using integrals, we find area =

$\int\limits^e_{-\infty} e^{-x} \, dx\\=-e^{-x}$

substitute limits

When we substitute -infinity we get e^infty which is again infinity

Hence finding out area is not possible.

The integral of area diverges.

7 0

4 years ago

CHECK MY ANSWERS PLEASE

Papessa [141]

Step-by-step explanation:

For a geometric sequence,

$\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}$

1. The sequence is :

3, 13, 23, 33,...

$\dfrac{13}{3}\ne \dfrac{23}{13}$

It is not geometric. It is false

2. The sequence is :

5, -25, 125, -625

$\dfrac{-25}{5}=\dfrac{125}{-25}\\\\-5=-5$

So, the sequence is geometric as the common ratio is same. It is true.

4 0

3 years ago