3 years ago

Suppose you and five friends are sitting in a circle on level ground an

Mathematics

2 answers:

Ivenika [448]3 years ago

4 0

Answer:

.......................

Ratling [72]3 years ago

4 0

Um yeah i have no clue I’m sorry

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If f(x) = x3 + 2x2 − 5, then what is f(−3)?

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Step-by-step explanation:

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and -3 is our x

-3times 3 +4 -5

9-1=8

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4 years ago

The time, t, required to travel a fixed distance varies inversely as the

Lemur [1.5K]

You must travel at 42 mph for 4 hours

Solution:

Time varies inversely as rate of motion

Let "t" be the time required

Let "r" be the rate of motion

Then, we get

$t \propto \frac{1}{r}\\\\t = k \times \frac{1}{r}\\\\t = \frac{k}{r} -------- eqn 1$

Where, "k" is the constant of proportionality

You travel 3 hours at a rate of 56 mph

Substitute t = 3 and r = 56 in eqn 1

$3 = \frac{k}{56}\\\\k = 3 \times 56\\\\k = 168$

Find the rate you must travel for 4 hours

r = ? and t = 4

Substitute t = 4 and k = 168 in eqn 1

$4 = \frac{168}{r}\\\\r = \frac{168}{4}\\\\r = 42$

Thus you must travel at 42 mph for 4 hours

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