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castortr0y [4]
3 years ago
9

I know solve 13but i want steps​

Mathematics
2 answers:
Fynjy0 [20]3 years ago
6 0
From Pythagorean theorem in ADB triangle
AB^2+BD^2=AD^2
9^2+BD^2=15^2
BD=12

From Pythagorean theorem in BCD triangle
CD^2+BD^2=BC^2
BC^2=5^2+12^2
BC=13
mars1129 [50]3 years ago
5 0

Step-by-step explanation:

In triangle ABD,

ang.ABD=90°

AB=9 cm

AD=15 cm

Now,

Using Pythagoras theorem,

AD2=AB2+BD2(2=square)

or,152=92+BD2

or,225=81+BD2

or,225-81=BD2

or,144=BD2

or,BD=12 cm

Then,

In triangle CBD,

CD=5 cm

BD=12 cm

BC=?

Now,

Using Pythagoras theorem,

BC2=CD2+BD2

or,BC2=52+122

or,BC2=25+144

or,BC2=169

or,BC=13 cm

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3 years ago
Arthur has a balance of $2330 on his credit card, which he plans to pay off by
dybincka [34]

Answer:

C. $80

Step-by-step explanation:

A. $70

B. $65

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D. $75

When he pays $70 monthly

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6 0
2 years ago
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gulaghasi [49]

Answer:

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5 0
3 years ago
I need help ASAP Please- show me how to work this problem ​
madam [21]

9514 1404 393

Answer:

  70° (number in the blank at the bottom)

Step-by-step explanation:

You need to know the meaning of "complement of an angle."

Complementary angles have a sum of 90°. So, the complement of 20° is the angle that makes the total 90°. It is 70°.

The line at the bottom of the figure tells you how to work the problem. It says "the cosine of an angle is the sine of its complement." If you put numbers in this statement, it tells you ...

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So, the answer to the question at the top of the page is ...

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7 0
3 years ago
Do any of you guys have an idea how to do this?​
fiasKO [112]
It would be the last one


Explanation

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