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liberstina [14]
3 years ago
9

​

Mathematics
2 answers:
never [62]3 years ago
8 0

Answer:

It's a and c

Step-by-step explanation:

i checked on khan academy

jeka57 [31]3 years ago
5 0
Choice c us the correct answer
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What are the solutions to the equation? 3x2+6x=45
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Step-by-step explanation:

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Answer:

It says it right there.

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Step-by-step explanation:

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3 years ago
Find x. Round to the nearest degree.
jeka94

The Law of Cosines features the 3 side lengths of a triangle, plus the measure of the angle opposite one of those sides.


We want angle x, which is opposite the side of length 39.


Then: a^2 = b^2 - 2ab cos C becomes 39^2 = 36^2 + 59^2 - 2(36)(59)cos x


or 1521 = 3481 + 1296 - 2(36)(59) cos x


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3 years ago
The height of the tunnel at the center is 35ft, and the vertical clearance must be 21 ft at a point of 8ft from the center. Find
Zinaida [17]

Answer:

y=-0.215x^2+35

Step by Step:

Let, h=0,  k=35, x=8, y=21

We know that, the general equation of the parabola.

   y-k = a(x-h)^2

\Rightarrow y=a(x-h)^2+k  .........(i)

Substitute the  value of h, k, x, y in equation (i) and find the value of a.

  21=a(8-0)^2+35

\Rightarrow 21=a\times 8^2+35

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Hence, the equation of the parabola is:

y=-0.215x^2+35

8 0
2 years ago
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