3 years ago

3x + 1 = 7 What is the value of x?

Mathematics

1 answer:

Olin [163]3 years ago

5 0

The value for X is 2

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Write 0.22222.... as a fraction

Bad White [126]

Answer:

$\frac{2}{9}$ or 2/9

Step-by-step explanation:

Any single digit integer over 9 is the same as the integer repeating in decimals.

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Number form for 525.048

Inessa [10]

Five hundred twenty-five and forty-eight thousandths

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3 years ago

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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20 is a factor of 24 true or false

igor_vitrenko [27]

False, 20 is not a factor of 24

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What is 451.568 rounded to the tenths place.

PSYCHO15rus [73]

It will be 451.6 because 5 is tents place 68 is big number so u add 1 + 5 = 6
Answer 451.6

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