2x - y + 4z + 1
what is the coefficient of y?​

Two rigid transformations are used to map abc to qrs. the first is a translation of vertex b to vertex r. what is the second transformation? a reflection across the line containing ab a rotation about point b a reflection across the line containing cb a rotation about point c

Can someone me i’m confused. will give brainliest and a whole bunch of points

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?