What expression is equivalent to 3x+3x+3x

9x

Step-by-step explanation:

When adding X you simply add the numbers in front of X.

3+3+3=9 so you have 9x

think of it as this. If you have 3 apples and add 3apples and then 3 more appls. How many apples are there

3 apples+ 3 apples+ 3 apples= 9 apples

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)