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Cloud [144]
3 years ago
15

(Brainliest for fastest right answer!!!) Which is correct?

Mathematics
1 answer:
zavuch27 [327]3 years ago
5 0

Answer:

Step-by-step explanation:

ax² + bx + c = a(x - x_{1})(x - x_{2})

D = b² - 4ac

x_{12} = ( - b ± √D ) / 2a

~~~~~~~~~~~~

Let x² = y , then y² + 8y - 9

Find the roots of equation y² + 8y - 9 = 0

D = 64 + 36 = 100 = 10²

y_{1} = ( - 8 - 10) / 2 = - 9  

y_{2} = ( - 8 + 10) / 2 = 1

y² + 8y - 9 = (y - 1)(y + 9) = (x² - 1)(x² + 9)

x² = 1 ⇒ x_{12} = ± √1

x^{4} + 8x² - 9 = (x - 1)(x + 1)(x² + 9)

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A geologist found a cubic foot block of ore containing iron and gold. The geologist knows that iron weighs 500 pounds per cubic
Rom4ik [11]

Answer:

https://www.scribd.com/document/220049145/treyouna-harris-writing-linear-equations-in-standard-form-google-docs

This might help.

Step-by-step explanation:


5 0
3 years ago
the 11th term in a geometric sequence is 48 and the common ratio is 4. the 12th term is 192 and the 10th term is what?
Soloha48 [4]

<u>Given</u>:

The 11th term in a geometric sequence is 48.

The 12th term in the sequence is 192.

The common ratio is 4.

We need to determine the 10th term of the sequence.

<u>General term:</u>

The general term of the geometric sequence is given by

a_n=a(r)^{n-1}

where a is the first term and r is the common ratio.

The 11th term is given is

a_{11}=a(4)^{11-1}

48=a(4)^{10} ------- (1)

The 12th term is given by

192=a(4)^{11} ------- (2)

<u>Value of a:</u>

The value of a can be determined by solving any one of the two equations.

Hence, let us solve the equation (1) to determine the value of a.

Thus, we have;

48=a(1048576)

Dividing both sides by 1048576, we get;

\frac{3}{65536}=a

Thus, the value of a is \frac{3}{65536}

<u>Value of the 10th term:</u>

The 10th term of the sequence can be determined by substituting the values a and the common ratio r in the general term a_n=a(r)^{n-1}, we get;

a_{10}=\frac{3}{65536}(4)^{10-1}

a_{10}=\frac{3}{65536}(4)^{9}

a_{10}=\frac{3}{65536}(262144)

a_{10}=\frac{786432}{65536}

a_{10}=12

Thus, the 10th term of the sequence is 12.

8 0
2 years ago
What is the name of this figure:
nika2105 [10]

Answer:

tringular prism

Step-by-step explanation:

there u go

4 0
3 years ago
The perimeter of a sand volleyball court is 52 meters. It is 8 meters wide. How long is it?
kolezko [41]

Answer:

18 meters if my mental math is right.

6 0
3 years ago
I need to understand this math.
melamori03 [73]
Just think of for example 6x4=24 so the Division problom would be 24 divided by 4 or 6 the answer would be 6 or 4

by
7 0
3 years ago
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