Square with side 4 is dilated by 7

Mathematics

1 answer:

Kazeer [188]3 years ago

5 0

Answer:

196 in/cm/m²

Step-by-step explanation:

Given that the scale factor is a : b , then the area factor is a² : b² Here the scale factor is 1 : 7 , thus area scale factor is 1² : 7² = 1 : 49 That is the area of the dilated square is 49 times the original square. area of dilated square = 4 × 49 = 196 in/cm/m²

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A store has a $74.99 item on sale for 30% off, plus an additional 20% off. What is the percentage of savings off on this item?

Vlad [161]

If it was priced at $100 and had 30% off, it would cost
($100 - (30% of $100)) =$70.
If there was an additional 20% off, it would cost
($100 - (30% of $100) - (20% of 30% of $100)) = $56.
So the total savings is (100-56)/100=44%.
For $74.99, the answer is the same but the numbers are slightly different,
(74.99 - (30% of 74.99) - (20% of 30% of 74.99))/74.99 = 44%.

7 0

4 years ago

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Talja [164]

Answer:

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Step-by-step explanation:

It often pays to follow directions. The attachment shows the use of a TI-84 graphing calculator to find the answers.

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For multiple choice problems where the choices make no sense, I like to suggest you ask your teacher to show you how to work the problem. (Alternatively, use the "Report this question" or "Ask a tutor" button sometimes provided.)