All categories

3 years ago

Expand and Simplify: (3x + 5) (x - 2) -Please Help! Due in for 4:30pm! Xx

Mathematics

1 answer:

Jobisdone [24]3 years ago

3 0

Answer:

I know this is really late but if anyone else needs help I hope this will help those people.

Step-by-step explanation: so expand (3x+5) (X-2) first apply FOIL method: (a+b) (c+d)= ac + ad +bc + bd..... a= 3x, b=5, c=x, d= -2. our end product would be 3xx+3x(-2) + 5x + 5(-2).

Then apply minus-plus rules: +(-a)= (-a)...... we would end up with 3xx-3 times 2x + 5x - 5times 2.

next simplify until we end up with 3x^2 - x- 10

Not 100% sure if this is what your looking for but this is my best educated guess from the question asked.

You might be interested in

Could someone help me fast, ill mark as brainliest, and no links bc ill report you for that

Masteriza [31]

D is correct I believe since the values has an outlier it automatically gets rid of using mean. The dots are somewhat symmetrical. And for something to be skewed the dots are to be “connected”

4 0

3 years ago

Look at picture. Does anybody know the answer I’m lost?

masha68 [24]

Let $x,y$ be the dimensions of the rectangle. We know the equations for both area and perimeter:

$A=xy=36$

$P=2(x+y)=36 \iff x+y=18$

So, we have the following system:

$\begin{cases}xy=36\\x+y=18\end{cases}$

From the second equation, we can deduce

$y=18-x$

Plug this in the first equation to get

$xy=x(18-x)=-x^2+18=36$

Refactor as

$x^2-18x+36=0$

And solve with the usual quadratic formula to get

$x=9\pm3\sqrt{5}$

Both solutions are feasible, because they're both positive.

If we chose the positive solution, we have

$x=9+3\sqrt{5} \implies y=18-x=18-9-3\sqrt{5}=9-3\sqrt{5}$

If we choose the negative solution, we have

$x=9-3\sqrt{5} \implies y=18-x=18-9+3\sqrt{5}=9+3\sqrt{5}$

So, we're just swapping the role of $x$ and $y$ . The two dimensions of the rectangle are $9+3\sqrt{5}$ and $9-3\sqrt{5}$

6 0

2 years ago

How to factor out the coefficient of the variable of fractions???

serg [7]

Answer:

i believe that it is 9(x-4)

Step-by-step explanation:

9x-36

36 divided by 9 = 4

9(x-4)

5 0

3 years ago

An employee makes a career change, her original salary was 65,000 and now it’s58,000 at her new job . What percent decrease was

julsineya [31]

Answer:

about 21 percent

Step-by-step explanation:

3 0

3 years ago

320% expressed as a mixed number in sinplest from is

UNO [17]

320% is equal to 3 whole parts and 20% of a part. If one part is 100, then the mixed number would be 3 20/100. However, the problem says to simplify this, so it would be, 3 1/5!

7 0

3 years ago

Read 2 more answers