3 years ago

12) -7x+y=-19 -2x+3y=-19

Mathematics

1 answer:

pogonyaev3 years ago

4 0

Answer: 3360

Step-by-step explanation: Reduce the expression, if possible, by cancelling the common factors.

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You can work out the percentage change and that would help you work out the rate of appreciation :)

The formula is ((new value - old value)/old value) * 100.

So you do $\frac{270,000 - 250,000}{250,000} \times 100 = 8\%$

Therefore the rate of appreciation is 8% p/a.

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3 years ago

1. You roll two dice. What is the probability of rolling a sum of 8 or more?

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Step-by-step explanation:

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jeka94

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2 years ago

3. Which one doesn't belong? Give a reason why each square does not belong.

defon

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C. 8%

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3 years ago

A woman standing on a hill sees a flagpole that she knows is 65 ft tall. The angle of depression to the bottom of the pole is 14

Oliga [24]

Answer:

Let the distance between woman and pole be "x".

From diagram,

In ΔOAB,

tan 18 = $\frac{Perpendicular}{Base}$

tan 18 = $\frac{65 -y}{x}$

∴ x = $\frac{65 -y}{tan 18}$ ................ (1)

In ΔOBC

tan 14 = $\frac{Perpendicular}{Base}$

tan 14 = $\frac{y}{x}$

y = x × tan 14 ..............(2)

equating (2) in (1), we get;

x = $\frac{65}{tan 18 + tan 14}$

x = $\frac{65}{0.574}$

∵ tan 18 + tan 14 = 0.574

<em>i.e. The her distance from the pole is 113.2 ft.</em>

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3 years ago