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egoroff_w [7]
3 years ago
9

A car travels at a constant speed. The graph above shows the car's travels.

Mathematics
2 answers:
aev [14]3 years ago
7 0

Answer:

The point shows the distance, 140 miles, driven in two hours.

Maksim231197 [3]3 years ago
3 0

Answer:

140 miles were driven in 2 hrs

Step-by-step explanation:

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Can someone please clearly and correctly solve and show me how to work out QUESTION 3 AND 4??
vredina [299]
There are 2 options to solve that.
1. The first one is by derivatives. 
f(x)=x^2+12x+36
f'(x)=2x+12
then you solve that for f'(x)=0
0=2x+12
x=(-6)
you have x so for (-6) solve the first equation, then you find y
y=(-6)^2+12*(-6)+36=(-72)
so the vertex is (-6, -72)
2. The second option is to solve that by equations:
for x we have:
x=(-b)/2a
for that task we have
b=12
a=1
x=(-12)/2=(-6)
you have x so put x into the main equation
y=(-6)^2+12*(-6)+36=(-72)
and we have the same solution: vertex is (-6, -72)

For next task, I will use the second option:
y=x^2-6x
x=(-b)/2a
for that task we have
b=(-6)
a=1
x=(6)/2=3
you have x so put x into the main equation
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3 0
3 years ago
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Answer:

so 5 miles upstream and 15 miles downstream

Step-by-step explanation:

25/5=5

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IrinaVladis [17]

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