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3 years ago

What is the first step to simplify the expression?

Mathematics

2 answers:

Snezhnost [94]3 years ago

8 0

Answer:

I believe it is the last one i'm not sure

Step-by-step explanation:

denpristay [2]3 years ago

7 0

For this case, we must show the first step to simplify the following expression:

$\frac {3 (x + 8) ^ 2} {(x + 2)}$

So, the first step is to solve the binomial to the square of the numerator, in the form:

$(a + b) ^ 2 = a ^ 2 + 2ab + b ^ 2$

So, we have:

$(x + 8) ^ 2 = x ^ 2 + 2 * x * 8 + 8 ^ 2\\(x + 8) ^ 2 = x ^ 2 + 16x + 64$

Then, the expression is as follows:

$\frac {3 (x ^ 2 + 16x + 64)} {(x + 2)}$

Answer:

Option D

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-7(2x-5)=-91<br> And I also need to do the check

ASHA 777 [7]

Answer: $the$ $answer$ $is$ $x=9$

Step-by-step explanation:

Divide both sides by the numeric factor on the left side, then solve.

$-7(2x-5)=-91$

8 0

3 years ago

Read 2 more answers

What is the difference between arcsin and sin^-1 ?

Len [333]

If you're using the app, try seeing this answer through your browser: brainly.com/question/2094473

_______________

Both refer to the inverse sine function.

The inverse sine (or arcsine) of x:

$\mathsf{f(x)=arcsin(x)=sin^{-1}(x)}$

where x is a real number in the domain of the function:

$\mathsf{-1\le x\le 1}$

and the arcsine function returns an angle in the interval $\mathsf{\left[-\,\frac{\pi}{2},\,\frac{\pi}{2}\right]:}$

$\mathsf{-\,\dfrac{\pi}{2}\le arcsin(x)\le \dfrac{\pi}{2}}\quad\longleftarrow\quad\textsf{range of the inverse sine function.}$

So if you see anywhere one of these expressions below

$\mathsf{\theta=arcsin(x)~~or~~\theta=sin^{-1}(x)}$

then you should look for an angle $\theta$ that satisfies the following conditions:

$\footnotesize\begin{array}{l}\bullet\end{array}\normalsize\begin{array}{l}\mathsf{sin\,\theta=x;} \end{array}\\\\\\
\footnotesize\begin{array}{l}\bullet\end{array}\normalsize\begin{array}{l}\mathsf{\dfrac{\pi}{2} \le \theta\le\dfrac{\pi}{2}.} \end{array}$

This angle $\theta$ is called the inverse sine of the real number x.

______

Pay attention and do not mistake the arcsine function for the reciprocal of sine (which is cosecant); especially if you prefer or see that notation with an superscript -1. This one can be easily mistaken for an exponent:

$\mathsf{sin^{-1}(x)=arcsin(x)\qquad\quad\checkmark}$

but the reciprocal is something like

$\mathsf{\big[sin(x)\big]^{-1}=\dfrac{1}{sin\,(x)}=csc(x)\qquad\quad(!!)}$

and this last one has a total different meaning.

I hope this helps. =)

6 0

4 years ago

In a freshman class of 80 students,22 students take Consumer Education,20 students take French,and 4 students take both.Which eq

MAXImum [283]

<h3>Answer: Choice C</h3>

P = 11/40 + 1/4 - 1/20

=========================================================

Explanation:

The formula we use is

P(A or B) = P(A) + P(B) - P(A and B)

In this case,