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2 years ago

Find the H.C.F of x² - 3x ,x² - 9

Mathematics

2 answers:

krek1111 [17]2 years ago

7 0

X^2-3x = x(x-3)
x^2-9 = x^2 - 3^2 = (x-3)(x+3)
HCF = x-3

iris [78.8K]2 years ago

4 0

X²－3x＝x(x－3)
x²－9＝x²－3²＝(x－3)(x＋3)
∴the highest common factor of x²－3x and x²－9 is x－3

Hope my answer helped u :)

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Which calculation and answer show how to convert 3/12 to a decimal<br> Plz help ASAP

DedPeter [7]

Answer:

Its C

Step-by-step explanation:

It is C becuase when converting a fraction to a decimal, you just divide the numerator by the denominator

Basically solve the fraction

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Or you can always look it like this

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2 years ago

David can paint a fence in ten hours. Alex can paint the same fence in eight hours. If

xxTIMURxx [149]

Answer:

40/9

Step-by-step explanation:

Use the work formula, $\frac{1}{A}$ + $\frac{1}{B}$ = $\frac{1}{T}$ , where A is the amount of time it takes one person, B is the amount of time it takes another person, and T is the time it takes for them to work together.

Plug in the times for David and Alex alone:

$\frac{1}{10}$ + $\frac{1}{8}$ = $\frac{1}{T}$

Find the least common denominator, which is 40.

$\frac{4}{40}$ + $\frac{5}{40}$ = $\frac{1}{T}$

$\frac{9}{40}$ = $\frac{1}{T}$

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So, if they worked together, it would take them 40/9 hours

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2 years ago

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2 years ago

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Suppose that the water level of a river is 34 feet and that it is receding at a rate of 0.5 foot per day. Write an equation for

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Answer:

The equation to represent the rate of receding water level is L = 34 $(0.5)^{d}$ .

Step-by-step explanation:

Given as :

The initial level of water in river = 34 feet

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Or, The rate of percentage of receding water level = 50 % per day

Let the level of water after d days = L

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The level of water after d days = initial level of water × ( $(1-\dfrac{\textrm Rate}{100})^{Time}$

I.e L = 34 × ( $(1-\dfrac{\textrm 50}{100})^{d}$

∴ L = 34 × $(0.5)^{d}$

Hence The equation to represent the rate of receding water level is L = 34 $(0.5)^{d}$ . Answer

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3 years ago

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Setler79 [48]

Answer:

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3 years ago

Find the H.C.F of x² - 3x ,x² - 9​

Find the H.C.F of x² - 3x ,x² - 9