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4 years ago

What’s the derivative of (2x+9)^3

1 answer:

8 0

If f(x) = (2x+9)^3, f '(x) = 3(2x+9)^2*(2), or f '(x) = 6(2x+9)^2. Here we used the power rule with chain rule to find the derivative.

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A stock was priced at $12 3/8 per share. It rose in price by $3 1/4 per share. What was its new price?

lubasha [3.4K]

Option A

The new price is $ $15 \frac{5}{8}$

<h3><u>Solution:</u></h3>

Given that, a stock was priced at $ $12 \frac{3}{8}$ per share.

It rose in price by $ $3 \frac{1}{4}$ per share.

New price = old price + rise in price

Thus to find out the new price, we have to add old price and rise in price

$\text { So, new price }=\$ 12 \frac{3}{8}+\$ 3 \frac{1}{4}$

$\text { New price }=\frac{12 \times 8+3}{8}+\frac{3 \times 4+1}{4}$

On solving we get,

$\text { New price }=\frac{96+3}{8}+\frac{12+1}{4}$

$\begin{array}{l}{\text { New price }=\frac{99}{8}+\frac{13}{4}=\frac{99+26}{8}} \\\\ {\text { New price }=\frac{125}{8}}\end{array}$

On converting to mixed fraction,

$\begin{array}{l}{\text { New price }=\frac{120+5}{8}} \\\\ {\text { New price }=15 \frac{5}{8}}\end{array}$

Hence, the new price is $15 \frac{5}{8}$ , so option A is correct.

8 0

4 years ago

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Ivenika [448]

Answer:

210 cubc feet

Step-by-step explanation:

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5 0

3 years ago

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Find the slope of a line perpendicular to a line with points (3, -7) and (2, -4).

dezoksy [38]

Answer:

1/3.

Step-by-step explanation:

The slope of the given line = (-4 - -7)/(2-3)

= 3 / -1

= -3.

The line perpendicular to this has slope - 1 / (-3)

= 1/3.

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3 years ago

Find the slope of the line that passes through (8, 6) and (2, 7).

Amiraneli [1.4K]

Vas happenin!!

Slope form - y2-y1/x2-x1

7-6/ 2-8

1/-6

Your slope is -6x

Hope this helps

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6 0

3 years ago

Please help me fasttttttttt

prohojiy [21]

X = 60 degrees
Y = 60 degrees
Z = 40 degrees

6 0

3 years ago