If the mean of x and 4x is 10, the x = ?
Please explain how you got your answer.

x = 4

Step-by-step explanation:

To find the mean of two numbers, you have to add the numbers, then divide by 2.

So, if 10 is equal to the mean of x and 4x, it is equal to the sum of 4x and x divided by 2. If we put this in the form of an equation, we get:

Now we can multiply both sides by 2, and get:

Simplify the left side to:

And lastly, divide both sides by 5:

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

answer: i think one of the answer is $150 and $300?

step-by-step explanation: