Suppose you construct lines a, b, c, and d so that a is perpendicular to both b and c and d is parallel to c. which of the following is true?

a. d is perpendicular to b.
b. b is parallel to c.
c. c is perpendicular to b.
d. none of the above.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.