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oksano4ka [1.4K]

3 years ago

13

suppose the annual rate of inflation is about 4% this means that the cost of an item increases by about 4%. write and evaluate a

n exponential expression to find the answer to this question.. if a piano costs $3,500 today, what did it cost 4 years ago?

1 answer:

Mashcka [7]3 years ago

4 0

Cost = (3,500) * (1.04)^years
Cost = (3,500) * (1.04)^4
<span><span><span>Cost = (3,500) * 1.16985856 </span> </span> </span>
<span><span>Cost = </span>4,094.50</span>

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Answer:

(-10,8)

Step-by-step explanation:

So our original point is (-6,9).

A translation of 4 units to the left means that the x-value would go left by 4. In other words, we subtract 4 to -6. We subtract because going to the left means that it's going to the negative direction.

A translation of down 1 unit means that the y-value would go down by 1. In other words, we subtract 1. Again, we subtract because going downwards means that it's going to the negative direction.

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3 years ago

Find the slope of the line that passes through (4,2) and (9,1)?

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Step-by-step explanation:

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We can use the rise-over-run formula to solve for the slope of the line.

$\displaystyle \text{slope} = \frac{\text{rise}}{\text{run}}\\\\\text{slope} = \frac{y_2-y_1}{x_2-x_1}$

However, we firstly need to name our coordinate points.

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Therefore, we can also label our coordinates as such:

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Now, we can supply these values into the formula and solve for our slope, or a better known variable, <em>m</em>.

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Therefore, our slope is $\displaystyle -\frac{1}{5}$ .

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