Solve.
d+e=2
d-e=4
Use the substitution method
•The solution is (3,-1).
•There is no solution.
•There are an infinite number of solutions.
•The solution is (5, 1).

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?