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3 years ago

Decimal to percentage

2 answers:

5 0

To convert a decimal to a percent, multiply the decimal by 100, then add on the % symbol. An easy way to multiply a decimal by 100 is to move the decimal point two places to the right. This is done in the example below. Each decimal in Example 1 went out two places to the right of the decimal point.

Andreas93 [3]3 years ago

5 0

The decimal you take it as it was of a hundred if it is just of 2 numbers

0.36= 36%

If it is of 3 numbers or more you can use decimals

0.873= 87.3%

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What is the solution to the following system of equations?

Paraphin [41]

Answer:

Option 2 ( 1,-10)

Step-by-step explanation:

The two equations are y = -x²-5x-4 -----(1)

and y = -x²+9x-18-------(2)

To get the solution of these lines we will substitute the value of y form equation 1 to 2.

- x² - 5x -4 = -x²+9x-18

Now by collecting similar terms on each side.

-x² -5x + x²-9x = -18 + 4

-14x = -14

14x = 14

x = 1

By putting the value of x in equation 1.

y = -1 - 5 - 4 = -10

So the solution is (1, -10)

Therefore Option 2 is the correct answer.

8 0

3 years ago

Read 2 more answers

Rewrite the equation by completing the square.<br> 4x² + 20r + 25 = 0<br> (x+...)^2=...

sattari [20]

Answer:

The equation $4\cdot x^{2} + 20\cdot x + 25 = 0$ is equal to $\left(x + \frac{5}{2} \right)^{2} = 0$ .

Step-by-step explanation:

Let be the equation $4\cdot x^{2} + 20\cdot x + 25 = 0$ , we proceed to rewrite the equation solely by algebraic means:

1) $4\cdot x^{2} + 20\cdot x + 25 = 0$ Given

2) $(2\cdot x)^{2} + 10\cdot (2\cdot x) + 25 = 0$ Definition of power/Associative property

3) $(2\cdot x + 5)^{2} = 0$ Perfect square trinomial

4) $2^{2}\cdot \left(x + \frac{5}{2} \right)^{2} = 0$ Distributive property/ $(a\cdot b)^{c} = a^{c}\cdot b^{c}$

5) $4\cdot (x + \frac{5}{2} )^{2} = 0$ Definition of power

6) $\left(x + \frac{5}{2} \right)^{2} = 0$ Compatibility with multiplication/Commutative and modulative properties/ $a\cdot 0 = 0$

4 0

3 years ago

The differential equation dy/dx=2x(4-y)

sergij07 [2.7K]

Horizontal means dy/dx=0
vertical means that you are dividing by 0 or dy/dx is undefined

at x=0, dy/dx=0
at y=4, dy/dx=0
so the answer is I and II

answer is 3rd option

5 0

3 years ago

Read 2 more answers

After how many months will colony 2 always have more bacteria than colony 1?

MaRussiya [10]

The true statement is that colony 2 will always have more bacteria than colony 1 after 4 months

<h3>How to determine the number of months?</h3>

The functions are given as:

Colony 1: f(x) = x^2
Colony 2: g(x) = 2^x

When colony 2 has more bacteria than colony 1, then it means that:

g(x) >f(x)

Substitute the function values

2^x > x^2

From the graph of both functions, we have:

2^x > x^2 at x >4

This means that colony 2 will always have more bacteria than colony 1 after 4 months