jenny bought gas for her car gas costs $2.55 per gallon jenny bought 13.8 gallons. What was the total cost for her gas

What can you determine about the solutions of this system

What rotation was applied to triangle def to create d’e’f’?

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations