3 years ago

The sum of two numbers is 41 and their difference is 5. what are the two numbers

Mathematics

1 answer:

antoniya [11.8K]3 years ago

5 0

This answer is 23 & 18.

Hope this is helpful!

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Right triangles abc and dbc with right angle c are given below. If cos(a)=15,ab=12 and cd=2, find the length of bd.

dmitriy555 [2]

see the attached figure to better understand the problem

we have that

$cos(A)=\frac{1}{5} \\ AB=12\ units\\ CD=2\ units$

Step 1

Find the value of AC

we know that

in the right triangle ABC

$cos (A)=(AC/AB)\\AC=AB*cos(A)$

substitute the values in the formula

$AC=12*(1/5)\\ AC=2.4\ units$

Step 2

Find the value of BC

we know that

in the right triangle ABC

Applying the Pythagorean Theorem

$AB^{2} =AC^{2}+BC^{2}\\ BC^{2}=AB^{2} -AC^{2}$

substitute the values

$BC^{2}=12^{2} -2.4^{2}\\BC^{2}= 138.24\\ BC=11.76\ units$

Step 3

Find the value of BD

we know that

in the right triangle BCD

Applying the Pythagorean Theorem

$BD^{2} =DC^{2}+BC^{2}$

substitute the values

$BD^{2} =2^{2}+11.76^{2}$

$BD=11.93\ units$

therefore

the answer is

the length of BD is 11.93 units

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Name the place value each number was round 1.974to2.0

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The answer is "tenths"

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A bag contains 5 red marbles and 4 green marbles. What is the probability of choosing a red marble then a green marble, without

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It will be 5 out of 9 times you will pull a red marble

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كيفية حساب cos a و tan a بحيث sin a يساوي 1على 2

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Answer:

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Step-by-step explanation:

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simplify that to 6/60 which further simplifies to 1/10 which is 10%

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