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2 years ago

Simplify the expression please

Mathematics

1 answer:

Luden [163]2 years ago

4 0

Answer:

Step-by-step explanation:

$\frac{-9x^{5} }{\sqrt{x+4} } = \frac{-9x^{5}\sqrt{x+4} }{\sqrt{x+4}\sqrt{x+4} }\\= \frac{-9x^{5}\sqrt{x+4} }{x+4 }$

Here is the answer for you.

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Find the sum of ∑4/k=1 (-4k)

Annette [7]

Answer:

Hello,

Answer C: -40

Step-by-step explanation:

$\displaystyle \sum_{k=1}^4\ (-4k)\\\\=-4*\sum_{k=1}^4\ k\\\\=-4*4*\dfrac{1+4}{2} \\\\=-4*5*2\\\\=-40\\$

4 0

2 years ago

When you subtract a positive number from a negative number the difference is always

deff fn [24]

The answer is true.

(+)(+)= +

(-)(-)= +

(-)(+)= -

8 0

2 years ago

What is the answer to this math equation(x+5)(x²-3x)

Nikolay [14]

Answer:

$x=-5\\x=0\\x=3$

Step-by-step explanation:

I assume your equation to solve is

$(x+5)(x^2-3x)=0$

When we have a product of two factors equal to zero,

$A\cdot B = 0$

The solution is either A = 0 or B = 0.

In this case, this means that we can break the equation into two equations:

$x+5=0\\x^2-3x=0$

Solving the first one, we get:

$x+5=0 \rightarrow x = -5$

For the second one, we rewrite it as:

$x^2-3x=0\\x(x-3)=0$

And we see that this equation has two solutions:

$x=0\\x=3$

Therefore, the three solutions are:

$x=-5\\x=0\\x=3$

8 0

3 years ago

-<br>Write the equation for tan 32.

Marizza181 [45]

Answer:

If the angle is 32, then the tan of 32 degrees will be 0.625.

Step-by-step explanation:

This is useful because if you know either Opposite or Adjacent length, you can enter it in the equation above and solve for the missing length.

You can also re-write the equation above to solve for Opposite and Adjacent to get the following new equations:

Opposite = 0.625 x Adjacent

Adjacent = Opposite / 0.625

3 0

2 years ago

Brita has a monthly budget of x dollars. She spends $1,425 on her mortgage every month. One-third of her remaining budget is spe

bazaltina [42]

Answer:

$(x - 1425)/3

Step-by-step explanation:

Let total monthly budget be x

Amount spent on mortgage = $1425

Remaining balance after spending on mortgage = x - $1425

Amount spent on recreational activities = one-third of the balance

Expressing amount spent on recreational activities as an equation will give;

Amount spent on recreational activities = 1/3 of x - $1425

= 1/3 × ( x - $1425)

= ( x - $1425)/3

Hence the required equation is;

R = $(x - 1425)/3

R means recreational activities

3 0

2 years ago