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Ilya [14]
3 years ago
12

A stereo is marked down $105. if this is a 25% decrease, find the cost price?

Mathematics
1 answer:
Aneli [31]3 years ago
3 0
Answer:420$
Solution: 105•4= 420$
25%= 1/4 therefore we can find the original price by multiplying the decrease with 4
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Answer:

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Step-by-step explanation:

<em>Graph is attached.</em>

<em />

The kite consists of 2 triangle, EFG and EHG.

The area of EFG:

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We also know that h + h _1 is the width of the rectangle and EG is the length of the rectangle

Thus,

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Thus, area of kite is always half of that of rectangle, the third choice is right.

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