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3 years ago

I cant resolve this equation : 2x = -2x + 8, can you help me please

Mathematics

1 answer:

chubhunter [2.5K]3 years ago

7 0

Answer:

x = 2

Step-by-step explanation:

OK so lets do it together.

2x = -2x + 8

Subtract 8 from both sides

2x - 8 = -2x

Add 2x to both sides

4x - 8 = 0

Add 8 to both sides

4x = 8

Divide each side by 4

x = 2

Check:

4 = -4 + 8

4 = 4

correct

If my answer is incorrect, pls correct me!

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-Chetan K

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In a sale the normal price of a book is reduced by 30% what singles number must be i multiple by to reduce something by 30%

maks197457 [2]

Step-by-step explanation:

This means the price of the book will decrease by 100%-30%=70%

70% decrease in x = 100% of x - 70% of x = 1x - 0.7x = (1 - 0.7)x = 0.3x So 0.3x represents a 70% decrease in x.

Notice that this multiplier .3 is the same as (30% of x).

the answer is 0.3.

6 0

3 years ago

A sphere has a radius of 2.7 centimeters what is it’s volume to the nearest cubic centimeter

-BARSIC- [3]

Answer:

The volume of the sphere is 82.4 cubic centimetre

Step-by-step explanation:

Given:

The radius of the sphere = 2.7 centimetres

To Find:

The volume to the nearest cubic centimetre = ?

Solution:

The volume of the sphere = $\frac{4}{3} \pi r^3$

where r is the radius

On substituting the values,

V = $\frac{4}{3} \pi(2.7)^3$

$V = \frac{4}{3} \pi(2.7)^3$

$V = \frac{4}{3} \pi(19.683)$

$V = \frac{78.732}{3} \pi$

$V= 26.244 \times \pi$

V = 82.4 cubic centimetre

7 0

3 years ago

3. The measure of side c is 110 inches and

Pavel [41]

C is it I think let me know if I’m wrong

4 0

3 years ago

If f(x) = 1-x2 and g(x) = 1 - x which is the rule of function (f – g)(x)?

V125BC [204]

Answer:

-x^2 +x

Step-by-step explanation:

f(x) = 1-x^2

g(x) = 1 - x

f(x) - g(x) = 1-x^2 - (1 - x )

Distribute the minus sign

= 1-x^2 -1 +x

Combine like terms

= -x^2 +x

6 0

4 years ago

Identify the symbols used for each of the following: (a) sample standard deviation: (b) population standard deviation; (c) sampl

EastWind [94]

Answer:

a) The symbol for sample standard deviation is S

b) The symbol for population standard deviation is б (sigma)

c) The symbol for sample variance $S^{2}$

d)The symbol for population variance is $б^{2}$

Step-by-step explanation:

Step 1:-

Population:- Population consists of the total of the observations with which we are concerned.

Parameters:- The statistical constants of the population namely mean , variance $б ^{2}$ and standard deviation 'б '

Sample:- A sample is a subset of a Population

statistics:-

he statistical constants of the sample namely mean , variance $S ^{2}$ and standard deviation 'S '

step2:-

a) The symbol for sample standard deviation is S

b) The symbol for population standard deviation is б (sigma)

c) The symbol for sample variance $S^{2}$

d)The symbol for population variance is $б ^{2}$

8 0

3 years ago