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leonid [27]
3 years ago
6

Explain and find CD please

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
4 0

Answer:

CD \approx5.29

Step-by-step explanation:

By geometric mean theorem:

CD=\sqrt {AD\times BD}  \\  \\ CD=\sqrt {7\times 4}  \\  \\ CD=\sqrt {28}  \\  \\ CD=5.29150262 \\  \\ CD \approx5.29

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The sum of two numbers is 134. If three times the smaller number is subtracted from the larger number, the result is 18. Find th
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Let, larger number be x and smaller number be y.

Condition 1: The summ of two numbers is 134.

It can be written as,

x+y=134\ldots\ldots\text{.}(1)

Condition 2: If three times the smaller number is subtracted from the larger number, the result is 18.

The equation is,

x-3y=18\ldots\ldots\ldots\text{.}\mathrm{}(2)

Solving equation 1 and 2,

\begin{gathered} \text{subtract equation (2) from (1),} \\ x+y-(x-3y)=134-18 \\ x+y-x+3y=116 \\ 4y=116 \\ y=29 \end{gathered}

Out the value of y=29 in equation (1),

\begin{gathered} x+y=134 \\ x+29=134 \\ x=105 \end{gathered}

Answer:

Larger number is x=105

Smaller number is y=29.

7 0
1 year ago
21 billion is how much more than 9.8 billion write scientific notation
Hoochie [10]
2.1 X 10^10 = 21,000,000,000
3 0
3 years ago
Read 2 more answers
Please help me with trig! True or False
Anton [14]

Answer:

False

Step-by-step explanation:

If it is a right triangle, the Pythagorean theorem will apply

a^2 + b^2 = c^2

4^2 + 5.05^2 = 6.6^2

16 +25.5025 =43.56

41.5025=43.56

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Round to the nearest integer

4^2 + 5^2 = 7^2

16+25 = 49

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5 0
4 years ago
A 4ft pole casts a shadow 6ft long. At the same time a wall casts a shadow 18ft. long. How tall is the wall?
ololo11 [35]

Answer:

12 ft

Step-by-step explanation:

Write and solve an equation of ratios:

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4 0
3 years ago
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3. One of Two numbers is The number The sum of numbers is 45. Find The numbers
Kaylis [27]
Just add numbers to get to 45
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