Can someone help me please

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

In the diagram, gef and hef are congruent. what is the value of x