Answer:
a=1
b=4
c=-1
Axis of cemetry and vertex:x=-2
Step-by-step explanation:
x=-b/2a
x=-4/2(1)
x=-2
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Let after t hours the distances D1<span> traveled by car A</span>
=> D1<span> = 30 t</span>
Car B starts at 10 am and will, therefore, have spent one hour less than car A when it passes it.
After (t - 1) hours, distance D2<span> traveled by car B </span>
=> D2<span> = 40 (t - 1)</span>
When car B passes car A, they are at the same distance from the starting point and therefore<span> D1 = D2 </span>
=> 30 t = 40 (t - 1)
Solve the equation for t,
=> 30 t = 40t - 40
=> 10 t = 40
=> t = 4
=><span> Car B passes car A at = 9 + 4 = 13 pm.</span>
Answer:
156 yards
Step-by-step explanation:
1 yd = 3 ft
So if 1 yd is equal to 3 ft then all you need to do is divide the amount of ft given by the amount that makes 1 yd
When you count the small lines in between 8 and 9, there are 8 lines
The difference between 8 and 9 is 1
Divide 1 by 8, you will have 0.125
This implies each small lines represent 0.125
When you count from 8 to where the point is, we have 6 small lines
Multiply the 6 by 0.125, we will have 0.75
8 + 0.75 = 8.75
The decimal is 8.75
