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Dafna11 [192]
3 years ago
14

Ab=6cm Ac=12cm Calculate the length of CD

Mathematics
1 answer:
KatRina [158]3 years ago
3 0

Answer:

12.7 cm

Step-by-step explanation:

ABC

12² = 6² + BC²

12² - 6² = BC²

144 - 36 = 108

CB² = 108

√108 = 10.392

CB = 10.392

CBD

Sin (55°) = CB / CD

0.81915 = √108 / CD

CD = 10.392 / 0.81915

CD = 12.686

CD = 12.7cm

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Answer:

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8 0
3 years ago
In the left column: how was the numerical part of the answer found (addition, subtraction )
Setler79 [48]
You can find the numerical part of the answer because it is the same on the right side.

For example:
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So that also happens in subtraction, the left side can be found by doing the same steps in the right column.
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5 0
3 years ago
Anna has $430. She wants to buy a phone that costs $275. Anna will also have to pay a sales tax of 7%.
ki77a [65]
19.25 (tax)
294.25 (total price)
135.75 (money left)

REASONING:

In this word problem it says Anna has 430 dollars. The phone costs 275 dollars. It also says that when she buys the phone, she will have to pay a tax of 7%.

To find how much tax she will pay, we must do [275] x [0.07]

After inputting this into a calculator, you will get 19.25 (tax)


To find the total price, all you have to do is add 19.25 to 275. When you do this, you will get 294.25 dollars (total price)


To find how much money she has left,

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5 0
3 years ago
How do you do this problem?? I'm very confused
Mamont248 [21]
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3 years ago
Horizontal lines and vertical lines are what to each other
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Answer:

/\

Step-by-step explanation:

6 0
3 years ago
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