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Svetlanka [38]
3 years ago
5

When x= 5 the value of the expression 20/-25 + x (x - 10) is

Mathematics
2 answers:
ASHA 777 [7]3 years ago
3 0
The answer is -25.8 because 5-10=-5, -5*5=-25, then you simplify fraction and add/subtract
garik1379 [7]3 years ago
3 0

Answer:

\frac{-129}{5}

Step-by-step explanation:

We have been given an expression \frac{20}{-25}+x(x-10). We are asked to evaluate our given expression, when x=5.

To evaluate our given expression, we will substitute x=5 in our given expression as:

\frac{20}{-25}+5(5-10)

-\frac{4}{5}+5(-5)

-\frac{4}{5}-25

Make a common denominator:

-\frac{4}{5}-\frac{5*25}{5}

-\frac{4}{5}-\frac{125}{5}

\frac{-4-125}{5}

\frac{-129}{5}

Therefore, the value of our given expression \frac{-129}{5}.

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The points of the graph are> (1,1), (2,2), (3,4), (4,8).

Then the sequence is:

- for the x-coordinate: 1, 2, 3, 4, 5, 6, 7, ...

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Which equation represents a proportional relationship between the x and y values?
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Answer:

D) y=-2x

Step-by-step explanation:

A linear relationship is of the form y=mx+b, where, m is the slope and b is the y-intercept (constant).

For a proportional relationship, the value of b=0 and thus it is of the form y=mx

Let us check each option and express it in the form above.

Option A:

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Since,b = 0, therefore, it is a proportional relationship.

Therefore, the correct option is D.

8 0
3 years ago
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Each year it increases 1.6%.

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so after 20 years, overall increase is found by 1.016^20 = 1.3736 or increase of 37.36%

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