In how many ways can a photographer arrange 7 people in a row from a family
of 10 people, if
(a) mom and dad are in the photo,
(b) mom and dad are next to each
other in the photo,
(c) either mom or dad is in the photo, not both.

Write the percent as a fraction or mixed number in simplest form. 0.8%

Can someone me with this? i’m not sure what to put for my equations.

Graph a triangle (xyz) and reflect it over the line y=x to create triangle x’y’z’. describe the transformation using words. draw a line segment from point x to the reflecting line, and then draw a line segment from point x’ to the reflecting line. what do you notice about the two line segments you drew? do you think you would see the same characteristics if you drew the line segment connecting y with the reflecting line and then y’ with the reflecting line? how do you know?