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Ksivusya [100]
3 years ago
12

3) Evaluate the expression 2x-5 when x = 3.

Mathematics
1 answer:
Shalnov [3]3 years ago
4 0

Answer:

1

Step-by-step explanation:

Plug in the x to the original equation given.

2(3)-5

2 times 3 is 6 so then,

6-5 =1

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Rounded to the nearest whole number, how many yards is 32 kilometers?
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B Is the correct answer

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Solve the following equation.<br> 7(x - 2) = 3(x + 4) <br> X = ?
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x=6.5

Step-by-step explanation:

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You multiply two integers. You increase one of them by 1 and decrease the other
snow_tiger [21]

Integers are numbers without decimals

The integers could you have multiplied are 9 and 2

Let the numbers be x and y

So, we have:

\mathbf{x \times y}

Increase x by 1 and reduce y by 1.

So, we have

\mathbf{(x +1) \times (y -1) = 6 + xy }

Open brackets

\mathbf{xy -x + y - 1 = 6 + xy}

Subtract xy from both sides

\mathbf{ -x + y - 1 = 6}

Collect like terms

\mathbf{ -x + y = 6 + 1}

\mathbf{ -x + y = 7}

Rewrite as:

\mathbf{ y -x= 7}

The above means that, the difference between the integers is 7.

There are several integers that fit the above <em>description</em>;

One possibility is: 9 and 2

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6 0
3 years ago
The soccer team is planning to sell health bars for a fundraiser. The prices of purchasing health bars from two different compan
ivanzaharov [21]

Answer:

40 bars

Step-by-step explanation:

Where x = Number of bars purchased by each team

We solve this question by equating both Equations from Company A to Company B

Company A = Company B

0.75x = 10 + 0.50x

Collect like terms

0.75x - 0.50x = 10

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x = 10/0.25

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5 0
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the difference between a two-digit number and that number reversed is 18. What could that number be. List all possibility's.
kirza4 [7]

9514 1404 393

Answer:

  20, 31, 42, 53, 64, 75, 86, 97

Step-by-step explanation:

The difference of 18 means the difference of digits is 18/9 = 2. Since the number you seek is the larger number, the 10s digit will be 2 more than the 1s digit. Possible numbers are ...

  20, 31, 42, 53, 64, 75, 86, 97

_____

If t and o are the tens and ones digits respectively, the relation you seek is ...

  (10t +o) -(10o +t) = 18

  9(t -o) = 18

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Since both t and o must be single digits, the minimum will be t=2, o=0, and the maximum will be t=9, o=7.

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