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Liono4ka [1.6K]
3 years ago
5

Solving Multi-Step Inequalities:

Mathematics
1 answer:
n200080 [17]3 years ago
4 0

Answer:

Because the problem says - they are AT LEAST...

You would need to list the answers this way

GrandD is < or = to 5  GrandS is greater or = to 7

Step-by-step explanation:

These are so fun!

Let GrandD = X

Let GrandS = X + 2 (because he is two years older than GrandD)

Their age together is 12 years - so...

GrandD + GrandS = 12 OR...

x + x + 2 = 12

Now solve for x.

2x + 2 = 12

2x = 10 (because we subtract the ones on the left from the ones on the right)

x = 5 (because we divide both sides by 2)

This means that GrandD (x) is equal or greater than 5 years old

And GrandS (x + 2) = or greater than 7 years old

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Lines a and b are perpendicular. If the slope of line a is 3, what is the slope of line b?
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Answer:

\large\boxed{D.\ -\dfrac{1}{3}}

Step-by-step explanation:

\text{Let}\ k:y=m_1x+b_1\ \text{and}\ l:y=m_2x+b_2,\ \text{then}\\\\l\ ||\ k\iff m_2=m_1\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\-------------------\\\\\text{We have the slope of given line a:}\ m_1=3.\ \text{Therefore the slope of a line b}\\\text{perpendicular to a is: }\\\\m_2=-\dfrac{1}{m_1}\to m_2=-\dfrac{1}{3}

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3 years ago
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Answer:

Step-by-step explanation:

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Answer:

Hi there!

THE CORRECT ANSWER IS 14

Step-by-step explanation:

NO EXPLANATION

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