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4 years ago

Help on number 12 please?

Mathematics

1 answer:

zloy xaker [14]4 years ago

7 0

Answer:

f(n)= 5 · 4

$f(n) = 5 \times 4 ^{n - 1}$

Step-by-step explanation:

You use the explicit formula for geometric sequence. The five is the firat term and is placed correctly. The 4 is the rate of change, because if you multiply 5 by 4 you get 20 and so on.

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Solve for x to the nearest tenth.

Romashka [77]

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3 years ago

If the cost, C(x), for manufacturing x units of a certain product is given by

Diano4ka-milaya [45]

Answer:

99 units.

Step-by-step explanation:

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$C(x)=x^2-15x+34$

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Subtract 8350 from both sides:

$x^2-15x-8316=0$

This equation can be a bit difficult to factor, if even possible, so we can use the quadratic formula:

$\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

In this case, a = 1, b = -15, and c = -8316. Thus:

$\displaystyle x=\frac{-(-15)\pm\sqrt{(-15)^2-4(1)(-8316)}}{2(1)}$

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$\displaystyle x=\frac{15\pm\sqrt{33489}}{2}$

Evaluate:

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Therefore, our solutions are:

$\displaystyle x=\frac{15+183}{2}=99\text{ and } x=\frac{15-183}{2}=-84$

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Therefore, for a cost of $8350, 99 items are being produced.

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3 years ago

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Your answer for number 8 will be "B"

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3 years ago

Read 2 more answers

Help on number 12 please?​

Help on number 12 please?