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Elena-2011 [213]
3 years ago
13

Please help me, I’m very confused

Mathematics
1 answer:
arlik [135]3 years ago
6 0
Answer:

Step-by-Step:
(This is a right angle which = 90°)

Set an equation up:
(x-4)+(2(x+6)) = 90
x-4+2x+12 = 90
3x+8 = 90
3x=82
x = 27.3333333333
x= 27.33
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Which equation is y = 2x2 – 8x + 9 rewritten in vertex form?
pishuonlain [190]

we have

y=2x^{2} -8x+9


Group terms that contain the same variable, and move the constant to the opposite side of the equation

y-9=2x^{2} -8x


Factor the leading coefficient

y-9=2(x^{2} -4x)


Complete the square. Remember to balance the equation by adding the same constants to each side

y-9+8=2(x^{2} -4x+4)

y-1=2(x^{2} -4x+4)


Rewrite as perfect squares

y-1=2(x-2)^{2}

y=2(x-2)^{2} +1-----> equation in vertex form


therefore


the answer is the option C

y=2(x-2)^{2} +1


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3 years ago
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Answer:

A: 180°, semi circle

Step-by-step explanation:

We are told that MK and HL are the diameters.

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A geneticist is studying a population of fruit flies. Of the 1278 flies, 467 are wingless and 446 have red eyes. There are 210 f
andreev551 [17]
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Given the sequence tn defined recursively below, find t4.
Alina [70]

Answer:

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Step-by-step explanation:

The base case in the recursive function are:

t_1 = 1

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The recursive case is equal to:

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So replace t_n for t_4:

t_4 = 2t_{3} + 3t_{2}

In the new expression t_2 is a base case so you don't have to worry for that part, but t_3 is still the recursive case so evaluate again in t_n

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t_2 and t_1\\ are define as base cases so you replace for it's numbers:

t_3 = 2(2) + 3(1) = 7

Now return to t_4 and replace for the new values:

t_4 = 2(7) + 3(2) = 14 + 6 = 20

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