Can someone help me I’ll give you brainlest who ever answers first :)

What is the value of 1/3× + 7x, when x =5

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'