What is the value of 2y+3,when y=4?

Which expression is equivalent to (4 +6i)^2? ? -20 + 48i 8 + 12i 16 - 36i 20 + 48i

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?

The function h (t) = -16t squared + 28t + 500 represents the height of a rock t seconds after it's propelled by a slingshot what does h (3.2) represent?