Which expression is equivalent to 7x(yz - 7 - 2y)

Which transformations could have occurred to map △abc to △a"b"c"? a rotation and a reflection a translation and a dilation a reflection and a dilation a dilation and a rotation

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries