Assume abc def. if ab = 12, bc = 15, and ac = 17, what is the length of ef

EF=15

Step-by-step explanation:

The legth of EF is the same as BC because both of these segments come at the end. For these sort of problems, you need to match up the line segments/angles on both sides of the equal side. For example, the line segment AB will be the same as DE because they are both in front of the equation on both sides. Hopefully this makes sense :)

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

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)