How to find out how many number combinations if numbers cannot repeat?

1 answer:

5 0

It is simple and easy to find out about how many number combinations there are if numbers cant repeat you simply look at which combinations that you are aiming for and find out the different type of ways that you can do to get that same equal numbers that you were hoping to find is simple like 1 + 9 = 10 as same as 5 + 5 =10 its not that hard. HOPE THIS HELPS!!!

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can you help me solve the equation: 5m+3=18

shtirl [24]

$5m+3=18\ \ \ \ \ |subtract\ 3\ from\ both\ sides\\\\5m=15\ \ \ \ \ \ \ |divide\ both\ sides\ by\ 5\\\\\boxed{m=3}$

5 0

4 years ago

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Find the exact value of the expression. Sin 265 cos 25 - cos 265 sin 25

DerKrebs [107]

Answer:

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=-\frac{\sqrt{3}}{2}$

Step-by-step explanation:

Recall that;

$\sin(A) \cos(B)-\sin(B) \cos(A)=\sin(A-B)$

This implies that;

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=\sin(265\degree-25\degree)$

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=\sin(240\degree)$

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=\sin(180\degree+60\degree)$

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=-\sin(60\degree)$

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=-\frac{\sqrt{3}}{2}$

4 0

3 years ago

What is the answer to this ? I totally forgot how to this kind of math 5/7 x 1/2

notka56 [123]

Answer:

5/14

Step-by-step explanation:

3 0

3 years ago

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PleaSe help!!! & explain

mafiozo [28]

A) arithmetic because it is a constant. E.g 5-2 is 3 and this is true through out the series

B) this is geometric because the ratio is constant. The ratio of each is 3. E.g 81/27= 3 and this is true through out the series

C) arithmetic because it is constant. 11-3= 8, and 8 is the answer through out the series

5 0

3 years ago

In 20 years Charles will be three times as old as he is now.Now how old is he?

Reil [10]

Answer:

The answer is 50

Step-by-step explanation:

20x3=50

6 0

3 years ago