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Archy [21]
3 years ago
15

Which equation is an identity?

Mathematics
2 answers:
irinina [24]3 years ago
7 0
The equation that represents an identity is <span>
3w + 8 – w = 4w – 2(w – 4). w = 8</span>
3241004551 [841]3 years ago
5 0

Answer:

The correct option is 2.

Step-by-step explanation:

The equations that are true for any value of the variable, no matter what value is plugged in for the variable, then they are called Identity equations.

The first equation is

7m-5=8m+7-m

7m-5=7m+7

Subtract 7m from both the sides.

-5=7

This statement is false for any value of m. Therefore this is not an Identity equation.

The second equation is

3w+8-w=4w-2(w-4)

Using distributive property,

2w+8=4w-2w+8

2w+8=2w+8

0=0

This statement is true for any value of w. Therefore this is an Identity equation.

The third equation is

9-(2v+3)=-2v-6

9-2v-3=-2v-6

-2v+6=-2v-6

6=-6

This statement is false for any value of v. Therefore this is not an Identity equation.

The fourth equation is

-3y+3=-3y-6

Add 3y on both the sides.

3=-6

This statement is false for any value of y. Therefore this is not an Identity equation.

Hence the correct option is 2.

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rodikova [14]
42|2\\21|3\\.\ 7|7\\.\ 1|\\42=2\times\fbox3\times\fbox7\\\\63|3\\21|3\\.\ 7|7\\.\ 1|\\63=\fbox3\times3\times\fbox7\\\\GCF(42;\ 63)=\fbox3\times\fbox7=\boxed{\boxed{21}}
5 0
3 years ago
Explain what independent and dependent variables mean
g100num [7]

Answer:

please give me brainlist and follow

Step-by-step explanation:

You can think of independent and dependent variables in terms of cause and effect: an independent variable is the variable you think is the cause, while a dependent variable is the effect. In an experiment, you manipulate the independent variable and measure the outcome in the dependent variable.

3 0
3 years ago
Solve the problem using 6.2%, up to $128,400 for Social Security tax and using 1.45%, no wage limit, for Medicare tax.
maksim [4K]

Based on the social security tax rate and the Medicare tax, the monthly Social security is $109.12 and the Medicare tax is $25.52.

<h3>What is monthly social security act?</h3>

Graham, C. has not reached the $128,400 threshold for social security so the Social Security tax withholding for the month will be:

= Monthly salary x Social security rate

= 1,760 x 6.2%

= $109.12

The Medicare has no limit and so will be:

= 1,760 x 1.45%

= $25.52

Find out more on Social Security and Medicare at brainly.com/question/27677508.

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3 0
1 year ago
Please help im struggling on this ​
Ksivusya [100]

Answer:

It looks like you cut off part of the questions...

Step-by-step explanation:

8 0
2 years ago
Use the drawing tool(s) to form the correct answer on the provided graph.
AlekseyPX

The solutions to the system of equations are (-2,-6) and (4,6)

<h3>How to determine the system of equations?</h3>

We have:

-2x + y = -2

y = -\frac12x^2 + 3x + 2

Next, we plot the graph of both functions.

From the attached graph, the equations intersect at (-2,-6) and (4,6)

Hence, the solutions to the system of equations are (-2,-6) and (4,6)

Read more about system of equations at:

brainly.com/question/21405634

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5 0
2 years ago
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