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Morgarella [4.7K]
4 years ago
13

to verify that 1/5(5x-20)-1/2(4x-8) is equivalent to -x. Which procedure can I follow to determine if the two expressions are eq

uivalent? Add the two expressions, put an equal sign between the two expressions and solve for x, substitute 5 into the first expression, substitute 4 into the second expression, and evaluate the, OR substitute 5 into each expression and evaluate them?
Mathematics
2 answers:
Blababa [14]4 years ago
7 0

Answer:

Step-by-step explanation:

There are multiple ways in which you could do this problem.

One would  be to carry out the indicated multiplication:

x - 4 - 2x + 4, or -x.  Obviously, this equals the given -x.

Colt1911 [192]4 years ago
6 0

Answer:

Substitute 5 into each expression and evaluate them.

Step-by-step explanation:

Just took the test

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How are rational numbers and Integers similar? How are they different?
saveliy_v [14]

Answer:

Every integer is a rational number, since each integer n can be written in the form n/1. For example 5 = 5/1 and thus 5 is a rational number. However, numbers like 1/2, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers. They are different because Integers include all whole numbers and their negative counterpart e.g. … -4, -3, -2, -1, 0,1, 2, 3, 4,… is a rational number but not an integer. All rational numbers belong to the real numbers. If two numbers are at the same distance from 0 as in the case of 10 and -10 they are called opposites.

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
Help, please. Thank you :)
Tomtit [17]
The answer is x=4

12/18 = x/6

12/18= 4/6
6 0
3 years ago
A camera costs $400 normally, but there is a sale of 25% off. There is also 8% sales tax. What is the total cost of the camera.
Diano4ka-milaya [45]

Answer:

$324

Step-by-step explanation:

Two ways to look at it:

Change 25 % to a decimal

$400 x .25= $100 is the discount

$400- $100= $300

Sales Tax: change 8% to a decimal

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or you can say you are paying 75% for the camera since it is discounted 25%

So change 75% to .75

$400 x .75=$300

Sales Tax: change 8% to a decimal

300 x .08= $24

Total cost is $324

7 0
3 years ago
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