Which equation represents a proportional relationship? a. y=2(x+1) b. y = 4x + 3 c. y=32x d. y=−2x will give brianlyest

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?