Solve 3(x + 15) in distributive property
2 answers:
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Answer:
Danielle drove 3 hours
Step-by-step explanation:
Suppose Heather moved in the x direction.
Then Danielle moved in the opposite direction, that is, she moved in the -x direction.
Let's call ,
,
at the speed, distance and time that I code Heather
Let's call ,
,
at the speed, distance and time Danielle codes.
Observe the following diagram:
(x) Heather <------ --------- hospital ----------
-----------> Danielle (-x)
So:
We know that after 4 hours the distance between Heather and Danielle was 290 km.
That is to say:
We know that
We already know , the distance from the hospital to Heather, so we can find
and thus know
So:
Then: