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3 years ago

An equation that is satisfied for every value of the variable for which both sides are defined

1 answer:

mote1985 [20]3 years ago

7 0

An equation that is satisfied for every value of the variable for which both sides are defined is called an identity.

For example:
Given the equation
3x + 4 = x + 2(x + 2)

Notice that for any value of x you use, the equation is true.

Thus, this type of equation is called an identity.

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2n+7+7n=13+3n+8n please help

Rasek [7]

first combine like terms so 2n + 7n which is 9n

so 9n + 7 = 13 + 3n + 8n

then combine on other side so 9n + 7 = 13 + 11n

then subtract 7 to 13 so 6

sp 9n + 6 = 11n

then subtract 9 to the other side so 2n

6 = 2n then divide all by 2

n= 3

3 0

3 years ago

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HELP WITH MY ANNOYING MIDDLE SCHOOL MATH PLEASEEEEEE!!!!!! WILL GIVE BRAINLIEST!!!!!

AlladinOne [14]

Answer:

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Step-by-step explanation:

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3 years ago

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Which expressions are equivalent to 9b?

djverab [1.8K]

Answer:

A. b+2(b+2b)

b + 2b + 4b = 7b

B. 3b + b = 4b

C. 2(2b) = 4b

None of them are equal to 9b

6 0

2 years ago

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Which situation CANNOT be represented by this equation? -13x+15=9

Rudik [331]

The equation that can not be represented is B because the variables are mixed up and are not matching with the correct formula.

8 0

3 years ago

Read 2 more answers

Given the two expressions shown below:

shusha [124]

Hi there!
The answer is A is irrational, but B is rational.

An irrational number is a number that cannot be written as a fraction.

Expression A.
$\sqrt{64} + \sqrt{5} = 64 + 2.23606...$
This cannot be written as a fraction and therefore the expression is irrational.

Expression B.
$\sqrt{64} + \sqrt{4} = 8 + 2 = 10 = \frac{10}{1}$
This can be written as a fraction and therefore the expression is rational

Your answer:
A is irrational, but B is rational.

~ Hope this helps you!
MarkV

5 0

3 years ago