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kolezko [41]
3 years ago
10

Challenge 1:

Mathematics
1 answer:
stepan [7]3 years ago
4 0

11+9=20

(11)^2-(9)^2=40

121-81=40

40=40

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How many ways can you arrange the letters in the word prime?
Jobisdone [24]
There are 5 letters in the word "prime"

Imagine we had 5 slots to fill. They are empty initially. 
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Slot 3 will have 3 choices
Slot 4 will have 2 choices
Slot 5 will have 1 choice

We have this countdown: 5,4,3,2,1

which multiplies out to 5*4*3*2*1 = 120

There are 120 unique ways to arrange the letters. Order matters. Because order matters, this is a permutation.
7 0
3 years ago
Write the expression as the sine, cosine, or tangent of an angle. sin 5x cos x - cos 5x sin x
mrs_skeptik [129]

Answer:

sin 5x cos x - cos 5x sin x = sin(4x)

Step-by-step explanation:

Given that the trigonometric expression,

sin 5x cos x - cos 5x sin x

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Sum and Difference Formulas

sin(A+B)=sin A cos B + cos A sin B

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So,

sin 5x cos x - cos 5x sin x = sin (5x - x)

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That's the final answer.

6 0
3 years ago
The _____ of two sets X and Y is denoted by X-Y​
lidiya [134]

Answer:

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Answer:

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8 0
3 years ago
Read 2 more answers
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monitta
Just keeping going with 16×-2=?×-2=?×-2 untill u get you your ninth nuber as well with tge 2 is a negative, so a a positive × a negative equal a negative and a negative × a negative equal
4 0
2 years ago
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