Solve for x

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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?

Can someone pls ! pls answer all. no explanation needed..

Which of these triangle pairs can be mapped to each other using two reflections?