If x-y=4 and z=6x - 5 - 6y, then z=?

56

Step-by-step explanation:

the sum of the first six triangular numbers (making it a tetrahedral number).; the number of ways to choose 3 out of 8 objects or 5 out of 8 objects, if order does not matter. the sum of six consecutive primes (3 + 5 + 7 + 11 + 13

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)