Answer: No, he is not correct
The number of combinations is 190
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Work Shown:
We have 10 shirts, 6 hats, and 4 scarves. This is 10+6+4 = 20 items total.
If we randomly pick out an item, then we have 20 to choose from. After selecting that first item, we have 20-1 = 19 items left to choose from.
So there are 20*19 = 380 different permutations. Order matters with permutations.
Since we aren't worried about order, this means that we've double counted so we have to divide by 2 to fix it.
So there are 380/2 = 190 combinations.
You can use the nCr combination formula 
with n = 20 and r = 2 to get the same result.
Using the equation, the amount of ribbon she needs to sell to break even is 50 ribbons.
<h3>How to represent system of equation and solve?</h3>
x = number of ribbons
y = expenses or revenue
Therefore, the system of equation for this situation is as follows;
y(expenses) = 23 + 0.04x
y = 23 + 0.04x
He charges $0.50 per ribbon. Therefore,
y(revenue) = 0.50x
y = 0.50x
Therefore, for her to break even,
23 + 0.04x = 0.50x
23 = 0.46x
x = 23 / 0.46
x = 50
Therefore, she needs to sell 50 ribbons for her to break even.
learn more equation here: brainly.com/question/20910741
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Answer:
660 ft
Step-by-step explanation:
I got it right ✅ khhgu y jnj
No because the maximum amount for sin and cos is 1.if alpha is 90 and beta is 0 the answer is 7 so it's not right.
Answer:
The dock is 
high
Step-by-step explanation:
we know that
Applying the Pythagoras theorem
Let
x------> the height of the dock
Solve for x
