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3 years ago

PLEASE HELP ME QUICK what is the simplified form of x+9/x+1 + x-2/5?

Mathematics

1 answer:

Ira Lisetskai [31]3 years ago

7 0

Answer:

Step-by-step explanation:

C and D are both wrong for the same reason. The denominator should be (x +1)*5 which means that either A or B is correct.

C and D have an error seldom seen on Brainly. It means that the denominator has been added rather than multiplied but even the addition is a little strange. Frankly, I don't know what has to be done to get either of them.

So the answer is

numerator: 5*(x + 9) + (x + 1)(x - 2)

denominator: 5*(x + 1)

Simplify the numerator. Remove the brackets.

numerator: 5x + 45 + x^2 - 2x + x - 2 Gather like terms

numerator: x^2 + 5x - 2x + x + 43 Simplify

numerator: x^2 + 4x + 43

Answer

x^2 + 4x + 43

==========

5(x + 1)

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Answer:

I think A is correct

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3 years ago

In the isosceles △ABC m∠ACB=120° and AD is an altitude to leg BC . What is the distance from D to base AB , if CD=4cm?

7nadin3 [17]

Correct answer is: distance from D to AB is 6cm

Solution:-

Let us assume E is the altitude drawn from D to AB.

Given that m∠ACB=120° and ABC is isosceles which means

m∠ABC=m∠BAC = $\frac{180-120}{2}=30$

And AC= BC

Let AC=BC=x

Then from ΔACD , cos(∠ACD) = $\frac{DC}{AC} =\frac{4}{x}$

Since DCB is a straight line m∠ACD+m∠ACB =180

m∠ACD = 180-m∠ACB = 60

Hence $cos(60)=\frac{4}{x}$

$x=\frac{4}{cos60}= 8$

Now let us consider ΔBDE, sin(∠DBE) = $\frac{DE}{DB} =\frac{DE}{DA+AB} = \frac{DE}{4+8}$

$DE = 12sin(30) = 6cm$

7 0

3 years ago

Can someone please help with this maths !!!!!

ioda

Answer:

C) -3

Step-by-step explanation:

Rearrange your equation so that it is in slope-intercept form (y = mx + b). The m in the equation is the gradient.

y = 7 - 3x

y = -3x + 7

The m-value is -3. This means that the gradient is -3.

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3 years ago

Read 2 more answers

( 7 − 1 9 ) ( 9 − 3 7 )

rusak2 [61]

Answer:

-12 × -28

=336.

<h2>Hope it helps you.</h2>

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2 years ago

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Answer:

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Step-by-step explanation:

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