Answer:
5 seconds it will hit the water.
Step-by-step explanation:
y=-16t²+400
add -16t² to both sides
-16t²=-400
divide both sides by 16
t²=-25
t=√25
t=5
Answer: 115
Step-by-step explanation: just did it on edg
Answer:
$0.8
Step-by-step explanation:
There is a relation of direct proportion between quantity of biscuit and its cost.
Let 200 g biscuit will cost $x.
Therefore,

The answer to 3(x+4)+15=6-4x is x=3