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3 years ago

Multiply ( 2 x – y ) ( 3 x + y )

Mathematics

2 answers:

dexar [7]3 years ago

7 0

$(2x-y)(3x+y)\\\\=2x(3x+y) -y(3x+y)\\\\=6x^2 +2xy - 3xy -y^2\\\\=6x^2 -xy -y^2$

Nikitich [7]3 years ago

3 0

Answer: 6x^2-xy-y^2.

Tell me if you want step by step!!

Hope this helped. :)

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Help me please find the value

inessss [21]

If 1/3x + 3 = x, then x-1/3 = 3
so
2/3 x = 3
x = 3 * 3/2 = 9/2

7 0

3 years ago

1. How is being able to find the least common

Igoryamba

Step-by-step answer:

For relatively small denominators, the easiest way is to multiply the two denominators AND divide by the highest common factor (HCF).

For example, adding 5/24+3/16

24*16 = 384

(use a calculator if necessary, for mental calculation, 24*16=20^2-4^2=400-16=384 ).

The highest common factor (HCF) is 8, since 24/8=3, 16/8=2, 3 and 2 do not have any more common factors, so it is the HCF.

The lowest common multiple (LCM) is then 384/8 = 48

For someone good at factoring, we see that the factors are:

24={2^3,3}

16={2^4} = {2^3,2}

so the LCM is either 16*3=48, or 24*2=48.

3 0

3 years ago

What is the equation of the line that is perpendicular to and has the same y-intercept as the given line?

Anastasy [175]

ANSWER

The required equation is

$y = 5x + 1$

EXPLANATION

The given line passes through the point

$(5,0) \: and \: (0,1)$

The slope of this line is given by the formula,

$m=\frac{y_2-y_1}{x_2-x_1}$

This implies that,

$m = \frac{1 - 0}{0 - 5}$

$m = - \frac{1}{5}$

The product of the slope of the two perpendicular lines should be negative one.

Thus,

$m_1\times m_2=-1$
This implies that,

$- \frac{1}{5} \times m_2=-1$

We multiply through by
$- 5$
to obtain,

$m_2=-1 \times - 5$

$m_2=5$
Therefore the slope of the line perpendicular to the given line is
$5.$

We use the slope intercept formula
$y =m x + b$

where
$b = 1$
is the y-value of the y-intercept.

We therefore have,

$y = 5x + 1$

as the required equation.

The correct answer is C.

8 0

3 years ago

Read 2 more answers

8x-6y=-18 <br>8x+7y=9<br>what does y equals

dimaraw [331]

8x-6y=-18 = y=4x/3 +3 and 8x+7y=9 is 8x/7+9/7

4 0

4 years ago

Y=5x+5 is the equation of a straight line graph. What is its gradient?

Nikolay [14]

Answer:

Step-by-step explanation: