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irinina [24]
3 years ago
7

Please solve this question

Mathematics
1 answer:
lianna [129]3 years ago
8 0

Answer:

C

Step-by-step explanation:

Since its a perfecr square root

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artcher [175]
-30 is the answer for your question
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You randomly draw a marble out of a bag that contains 20 total marbles. 12 of the marbles in the bag are blue.
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P( blue marble) is 12 / 20 = 0.6
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A new bridge structure requires triangles that are in a ratio of 1:1. If AC = 2x + 10 and EC = 4x − 18, find the distance betwee
gavmur [86]

Answer:  The required distance between the top and bottom of the bridge is 76 feet.

Step-by-step explanation:  Given that a new bridge structure requires triangles that are in a ratio of 1:1.

AC = 2x + 10 and EC = 4x − 18.

We are to find the distance between the top and bottom of the bridge, in feet.

Since the two triangles ACB and DCE are in the ratio 1 : 1, so their corresponding sides are also in the ratio 1 : 1.

The sides AC and EC are corresponding to each other, so we must have

AC:EC=1:1\\\\\Rightarrow \dfrac{AC}{EC}=\dfrac{1}{1}\\\\\Rightarrow AC=EC\\\\\Rightarrow 2x+10=4x-18\\\\\Rightarrow 4x-2x=10+18\\\\\Rightarrow 2x=28\\\\\Rightarrow x=\dfrac{28}{2}\\\\\Rightarrow x=14.

Therefore, the distance between the top and bottom of the bridge is

EA\\\\=EC+AC\\\\=4x-18+2x+10\\\\=6x-8=6\times14-8\\\\=84-8\\\\=76~\textup{feet}.

Thus, the required distance between the top and bottom of the bridge is 76 feet.

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Find a solution to the following system of equations. -3x+3y=-9 -3x+y=7
V125BC [204]

Answer:

(-5, -8)

Step-by-step explanation:

-3x+3y=-9

-3x+y=7

----------------

simplify -3x+3y=-9 into x-y=3

----------------------------------------

y=x-3

-3x+y=7

------------

-3x+(x-3)=7

-3x+x-3=7

-2x-3=7

-2x=7+3

-2x=10

x=10/-2=-5

y=-5-3=-8

x=-5, y=-8

3 0
3 years ago
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