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2 years ago

8

I still can’t figure out this stupid simple interest question! I tried several answer n NONE worked so I’m gonna try 1 last time

before I loose my mind.. the formula for simple interest is I-=Prt. Solve the formula for t!

1 answer:

natka813 [3]2 years ago

7 0

t = $\frac{I}{Pr}$

isolate t by dividing both sides by Pr

$\frac{I}{Pr}$ = t ⇒ t = $\frac{I}{Pr}$

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Answer:

The 6 stands for 600

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2 years ago

F(x)=(x-6)e^-3x find the interval in which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema

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$\bf f(x)=(x-6)e^{-3x}\\\\
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\cfrac{dy}{dx}=1\cdot e^{-3x}+(x-6)-3e^{-3x}\implies \cfrac{dy}{dx}=e^{-3x}[1-3(x-6)]
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\cfrac{dy}{dx}=e^{-3x}(19-3x)\implies \cfrac{dy}{dx}=\cfrac{19-3x}{e^{3x}}$

set the derivative to 0, solve for "x" to get any critical points
keep in mind, setting the denominator to 0, also gives us critical points, however, in this case, the denominator will never be 0, so... no critical points from there

there's only 1 critical point anyway, and do a first-derivative test on it, check a number before it and after it, to see what sign the derivative has, and thus, whether the graph is going up or down, to check for any extrema

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2 years ago

Becki put some stamps into her stamp collection book she put 14 stamps on each page if she completely filled 16 pages how many s

aleksandrvk [35]

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Step-by-step explanation:

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To find the total number of stamps that Becki put in the book we will multiply the number of stamps put on each page by the number of completely filled pages.

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2 years ago

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2 years ago

Which equation represents the line that passes through the points (-3, 7) and (9,-1)? oy--3x+5 o y=-x-7 o y=zx-7 oy - 12 2x+5

olchik [2.2K]

Answer:

The answer is

<h2> $y = - \frac{2}{3} x + 5$ </h2>

Step-by-step explanation:

Equation of a line is y = mx + c

where

m is the slope

c is the y intercept

To find the equation we must first find the slope of the line.

So the slope of the line using points (-3, 7) and (9,-1) is

<h3> $m = \frac{ - 1 - 7}{9 + 3} = - \frac{8}{12} = - \frac{2}{3}$ </h3>

Now we use the formula

<h3>y - y1 = m(x - x1)</h3>

where

m is the slope

( x1 , y1) is any of the points given

So the equation of the line using point

( - 3 , 7) and slope - 2/3 is

<h3> $y - 7 = - \frac{2}{3} (x + 3) \\ y - 7 = - \frac{2}{3} x - 2 \\ y = - \frac{2}{3} x - 2 + 7$ </h3>

We have the final answer as

<h3> $y = - \frac{2}{3} x + 5$ </h3>

Hope this helps you

5 0

2 years ago

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