Answer:
Step-by-step explanation:
Starting at sea level, a submarine descended at a constant rate to a depth of −4/5 mile relative to sea level in 3 minutes.
Total time = 3 minutes
We need to find what was the submarine's depth relative to sea level after the first minute,
Given quadratic equation : 
Let us apply standard quadratic form 
We know, quadratic formula
a = 4
b = 2
c= -1
Now we plug in all the values in quadratic formula
.
<h3>The above one is the substitution of values of a,b,c in quadratic formula.</h3>
Answer:
7x
Step-by-step explanation:
4x−6+3x+6
=4x+−6+3x+6
Combine Like Terms:
=4x+−6+3x+6
=(4x+3x)+(−6+6)
=7x
Isolate the variable, I would add d to both sides, creating 4<4+d+d or 4<4+2d
then subtract 4,
0<2d
d>0
