All categories

3 years ago

..........................

Mathematics

1 answer:

Ipatiy [6.2K]3 years ago

6 0

$\dfrac{3}{x^2+14x+48}\div\dfrac{3}{10x+60}=\dfrac{3}{x^2+8x+6x+48}\cdot\dfrac{10x+60}{3}\\\\=\dfrac{1}{x(x+8)+6(x+8)}\cdot\dfrac{10(x+6)}{1}=\dfrac{10(x+6)}{(x+6)(x+8)}=\dfrac{10}{x+8}$

Answer: C. $\dfrac{10}{x+8}$

You might be interested in

What is the slope of the following equation?

777dan777 [17]

Answer: A. -3

Step-by-step explanation: The slope is the coefficent of x, this can be read as -3/1, down 3 over 1.

6 0

2 years ago

I don’t understand the equation

ankoles [38]

you need to find to find the value of x and y.

2x>(-15-5y)

x>(-15-5y)/2

now put this in to other equation and solve for y and then put the y value in and find x.

6 0

3 years ago

A teacher writes an inequality x divided by 6 < -2 on the board. Vincent incorrectly solves the inequality and obtains x <

scZoUnD [109]

The error Vincent made was that he only multiplied the left side of the inequality with 6 although he had to multiply on both sides

Step-by-step explanation:

Given inequality that the teacher wrote is:

$\frac{x}{6} -2$

Solving an inequality means that the variable should be isolated on left side of the inequality.

So multiplying both sides by 6

$6* \frac{2}{6} < -2 * 6\\x < -12$

Vincent got the answer is x<-2 = > The error Vincent made was that he only multiplied the left side of the inequality with 6 although he had to multiply on both sides

Keywords: Inequality, solution

Learn more about inequalities at:

#LearnwithBrainly

4 0

3 years ago

If ln(x^2-x-1)=0 , then x= ?

Umnica [9.8K]

Answer:

x = -1 or 2

Step-by-step explanation:

Taking the antilog, you have the quadratic ...

x^2 -x -1 = 1

x^2 -x -2 = 0 . . . . subtract 1

(x -2)(x +1) = 0 . . . factor

The values of x that make these factors zero are the solutions to the equation.

x = 2 or x = -1

3 0

3 years ago

How do you solve 35=-2x-15

Ilya [14]

$35=-2x-15\\2x=-15-35\\2x=-50\\x=-25$

3 0

3 years ago