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zlopas [31]
2 years ago
10

What is the vertex of the equation f(x) = x^2-12x+9

Mathematics
1 answer:
Ymorist [56]2 years ago
6 0

Answer:

the vertex is (6,-27)

Step-by-step explanation:

You might be interested in
Solve using linear combination. 8x+14y=4 -6x-7y+-10
emmasim [6.3K]

It's best to write the two equations as a vertical column:

8x+14y=4

-6x-7y = -10

Note that if we multiply the 2nd equation by 2, we get -12x - 14y = -20. The reason for wanting this version of the 2nd equation is that its -14y cancels the +14y in the first equation:

-12x - 14y = -20

8x+14y=4

Combine these equations, column by column. We get -4x = -16, which results in x = 4. Now find y by subbing 4 for x in either given equation. If we use the first equation, we get 8(4) + 14y = 4, or 32 + 14y = 4, or 14y = -28. Then y = -2.

The solution to this system of linear equations is thus (4,-2).

Check this result by substitution of these coordinates into -6(4) - 7y = -20:

-24 - 7(-2) = -10. Is this true or not?

-24 + 14 = -10 is true. Thus, (4,-2) is the desired solution.

4 0
3 years ago
Hallar el area de un triangulo equilatero cuyas bases miden 70dm y 134 dm y el lado oblicuo 85dm
Novay_Z [31]
Honestly I don’t know the answer I tried
4 0
3 years ago
Imagine the average time to complete a “4-year” bachelors degree is actually 4.3 years based on national data. You collect data
Nataly [62]

Answer:

To answer you question, we need the confidence internals formula, μ±Zc*(σ/\sqrt{N}); N is the 20 psychology students, 0.5 the desviation standar and 4.3 is the medium based on national data, every fact in years.

Step-by-step explanation:

You need to consult the Zc value, you can find this table attached in this question; for 95%, we have a Zc value of 1.96.

Next step replace values: 4.3±1.96*(0.5/\sqrt{20}) = 4.3±0.22 (rounding the result)

So, the confidence interval are:

4.08cm≤X≤4.52cm

8 0
3 years ago
she brought the cameras for $65 each and included a 60% markup to get the selling price ,what was the selling price for one came
Bas_tet [7]
39 I think
how many cameras did she buy?
opps I forgot to add 39 to 65 for a total of 104
SORRY


4 0
3 years ago
Read 2 more answers
Help i need it badly
melisa1 [442]
Yeah same what you need help on tho
7 0
3 years ago
Read 2 more answers
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