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lisabon 2012 [21]
3 years ago
13

How to turn a percent into a decimal

Mathematics
2 answers:
vitfil [10]3 years ago
4 0

To turn a percent into a decimal, move the decimal point over to the left two places.

For example, 25% would be .25 as a decimal.

An easy way to remember how many places the decimal point moves is by looking at the percent sign. It has two circles on either side of the slash, so two circles = two places.

Elena-2011 [213]3 years ago
3 0

Step 1: Find the percentage in the problem.

Step 2: Create a fraction by putting the fraction as the numerator over 100.

Step 3: Divide the numerator "the percent" by the denominator which is 100.

Example:

32% = ?

\frac{32}{100}

32 ÷ 100 = .32

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Prove by mathematical induction that 1+2+3+...+n= n(n+1)/2 please can someone help me with this ASAP. Thanks​
Iteru [2.4K]

Let

P(n):\ 1+2+\ldots+n = \dfrac{n(n+1)}{2}

In order to prove this by induction, we first need to prove the base case, i.e. prove that P(1) is true:

P(1):\ 1 = \dfrac{1\cdot 2}{2}=1

So, the base case is ok. Now, we need to assume P(n) and prove P(n+1).

P(n+1) states that

P(n+1):\ 1+2+\ldots+n+(n+1) = \dfrac{(n+1)(n+2)}{2}=\dfrac{n^2+3n+2}{2}

Since we're assuming P(n), we can substitute the sum of the first n terms with their expression:

\underbrace{1+2+\ldots+n}_{P(n)}+n+1 = \dfrac{n(n+1)}{2}+n+1=\dfrac{n(n+1)+2n+2}{2}=\dfrac{n^2+3n+2}{2}

Which terminates the proof, since we showed that

P(n+1):\ 1+2+\ldots+n+(n+1) =\dfrac{n^2+3n+2}{2}

as required

4 0
3 years ago
Try This one out and I’ll give you brainliest no links or I will report you Thank you
sladkih [1.3K]

Answer:

32. steps below.

Step-by-step explanation:

So calculate 4(2x2^3-8)

=

4(2^4-8)

calculate

4(16-8)

Then get

4x8=32.

3 0
2 years ago
Read 2 more answers
1)
Tcecarenko [31]
So the x intercepts are going to be at the places where y = 0 so you can just read that off and get (-2,0) and (3,0). Hope this helps :)
5 0
3 years ago
Work out an equation of the straight line with gradient 3 that passes through the point with coordinates (2, 4).
Gnom [1K]

Answer:

The answer is

\huge \boxed{y = 3x - 10}

Step-by-step explanation:

To find an equation of a line given the slope and a point we use the formula

y -  y_1 = m(x -  x_1)

where

m is the slope

( x1 , y1) is the point

From the question the point is (2, 4) and the slope is 3

The equation of the line is

y - 4 = 3(x - 2) \\ y + 4 = 3x - 6 \\ y = 3x - 6 - 4

We have the final answer as

y = 3x - 10

Hope this helps you

3 0
4 years ago
Solve the equation for the specified variable <br> Y=cd-8, for c
melomori [17]
Y=cd-8
Add 8 to each side giving you
y+8=cd

Divide by d on each side giving you

C=(y+8)/d
8 0
3 years ago
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