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4 years ago

Please answer the questions with full working and explantation.

Mathematics

1 answer:

kow [346]4 years ago

8 0

Answer:

x = 4

Step-by-step explanation:

Given

$\frac{1}{x+5}$ = $\frac{1}{4x-7}$ ( cross- multiply )

4x - 7 = x + 5 ( subtract x from both sides )

3x - 7 = 5 ( add 7 to both sides )

3x = 12 ( divide both sides by 3 )

x = 4

You might be interested in

Let f(x)=4x^2+3x−1/4x^2+9x+5 and g(x)=4x^2+7x−2/x^2−4. Simplify: f(x)÷g(x) f(x)÷g(x)=______

Neporo4naja [7]

Answer:

$\frac{x-2}{4x+5}$

Step-by-step explanation:

Given

$\frac{4x^2+3x-1}{4x^2+9x+5}$ ÷ $\frac{4x^2+7x-2}{x^2-4}$

Factorise numerator / denominator of both fractions

= $\frac{(4x-1)(x+1)}{(4x+5)(x+1)}$ ÷ $\frac{(4x-1)(x+2)}{(x-2)(x+2)}$

Cancel common factors on numerator/ denominator of both fractions

= $\frac{4x-1}{4x+5}$ ÷ $\frac{4x-1}{x-2}$

Change ÷ to × and turn second fraction upside down

= $\frac{4x-1}{4x+5}$ × $\frac{x-2}{4x-1}$

Cancel the common factor 4x - 1 on numerator/ denominator, leaving

$\frac{x-2}{4x+5}$

8 0

4 years ago

5. Which of the following is an example of a proper fraction?

Ghella [55]

The answer for your question is 15/2 because it dosent add up to a proper fraction

6 0

4 years ago

20 POINTS!! What would be the first step to solve this equation?

rjkz [21]

Answer:

its b

Step-by-step explanation:

because you always have to divide by the number on top

7 0

3 years ago

Calculate the value of x

vampirchik [111]

Answer:

x = 30

Step-by-step explanation:

All the angles on a point add up to 360°. Thus, you can find 2x easily.

2x = 360° - 300°

= 60

x = 60 ÷ 2

= 30

5 0

3 years ago

Read 2 more answers

in the following census population density dataset, what are the first, second, third quartiles? 1,19,35,43,49,55,56,56,63,67,94

aniked [119]

It is do 67 my88
Ta 66

7 0

4 years ago