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Ber [7]
3 years ago
7

18=30-r30 solve for r

Mathematics
2 answers:
alisha [4.7K]3 years ago
6 0

Answer:

r=2/5

Step-by-step explanation:

trasher [3.6K]3 years ago
3 0

Answer:

r =

Step-by-step explanation:

r=30√12,−30√12

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The base of an auditorium is in the form of an eclipse 200 feet long and 100 feet wide a pin drop near one focus can clearly be
dedylja [7]

Answer:

Let the coordinate of focus be (\pm c , 0)

As per the statement: The base of an auditorium is in the form of an eclipse 200 feet long and 100 feet wide.

⇒Length of Major axis=base of an auditorium = 200 feet and Length of a minor axis=wide of a auditorium = 100 ft

Semi-major axis (a) = 100 ft and

semi-minor axis(b) = 50 ft

Then, by an equation:

c^2 = a^2-b^2

Solve for c:

Substitute the given values we have;

c^2=(100)^2-(50)^2

Simplify:

c^2 = 7500

or

c=\sqrt{7500} = 86.6025404 ft

Distance between the foci is,  2c = 2 \cdot 86.6025404 = 173.205081

Therefore, the distance between the foci to the nearest 10th of a foot is, 173.2 ft

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4 years ago
Point C is the Image of C (-4,-2) under a Reflection across the x-axis.
Svetradugi [14.3K]

Step-by-step explanation:

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Using the point C (-4,-2) and the refection rule:

(-4,-2) \rightarrow(-4, 2)

\text {C' should be (-4,2)}

8 0
3 years ago
Zoe needs to by beads to make jewelry. For each earring, Zoe uses 3 small blue beads, 1 small metallic bead and 2 large green be
harina [27]
For this question you should say:
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now for one earring she needs 6 beads so for 8 earrings she will need:
6*8 = 48 :)))
i hope this is helpful
have a nice day 
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