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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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8 is the answer because it goes 11 and if you add 8 it becomes 19 add 8 it becomes 27 add 8 35 add 8 43

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Which expressions are equivalent to the one below? Check all that apply.<br> 3x
noname [10]

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F and C

Step-by-step explanation:

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3 years ago
Find the missing angle according to the Triangle Exterior Angle Theorem
atroni [7]

Answer:

x=128°

Step-by-step explanation:

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5 0
3 years ago
Someone plz help me 1-1\2c=6
GarryVolchara [31]

1 - 1/2c = 6

1 -1 - 1/2c = 6 -1 (subtract 1 on both sides)

-1/2c = 5 (next do the inverse operation)

c = 5 ÷ 1/2

c = -10

to check your answer substitute the value of c in the equation;

1- 1/2c = 6

1- 1/2(-10) = 6

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6 0
3 years ago
The world population at the beginning of 1980 was 4.5 billion. Assuming that the population continued to grow at the rate of app
AfilCa [17]

Answer:

Q(t) = 4.5(1.013)^{t}

The world population at the beginning of 2019 will be of 7.45 billion people.

Step-by-step explanation:

The world population can be modeled by the following equation.

Q(t) = Q(0)(1+r)^{t}

In which Q(t) is the population in t years after 1980, in billions, Q(0) is the initial population and r is the growth rate.

The world population at the beginning of 1980 was 4.5 billion. Assuming that the population continued to grow at the rate of approximately 1.3%/year.

This means that Q(0) = 4.5, r = 0.013

So

Q(t) = Q(0)(1+r)^{t}

Q(t) = 4.5(1.013)^{t}

What will the world population be at the beginning of 2019 ?

2019 - 1980 = 39. So this is Q(39).

Q(t) = 4.5(1.013)^{t}

Q(39) = 4.5(1.013)^{39} = 7.45

The world population at the beginning of 2019 will be of 7.45 billion people.

6 0
4 years ago
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