#7 is B, the trapezoid is reflected across the x axis
#8 is C, unlike D, answer C is still the same shape as triangle A. Answer A is just the same triangle in the same position, can't tell if it moved or not bc it never showed us. B is a reflection, it's flipped.
#9 is D, nothing has changed except it's position; it's been moved to the right
#10 is C, the points of the triangle are at different positions, and it didn't look like it flipped over the x or y axis, so it's reflection. It's also moved to the right, so translation
Hope this helped
