The sum of two numbers is 98. their difference is 22. write a system of equations that describes this situation. solve by elimination to find the two numbers.
a.
x + y = 98
x – y = 22
55 and 33
c.
x – y = 98
x + y = 22
59 and 39
b.
x + y = 98
x – y = 22
60 and 38
d.
x + y = 22
y – x = 98
55 and 39

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