We must find UNIQUE combinations because choosing a,b,c,d... is the same as d,c,b,a...etc. For this type of problem you use the "n choose k" formula...
n!/(k!(n-k)!), n=total number of choices available, k=number of choices made..
In this case:
20!/(10!(20-10)!)
20!/(10!*10!)
184756
Hello there!
5d = 17.1
The equation is asking you to find the value for "d". How to do that? Well, all you have to do is divide both side by 5.
5d/5 = 17.1
d = 3.42
That's your answer!
You can even double check your work, if you want to. How? Well, you just need to replace 3.42 where it belongs.
5(3.42) = 17.1
17.1 = 17.1
True!
Let me know if you have additional questions. As always, it is my pleasure to help students like you!
Answer:
2100
Step-by-step explanation:
5/210=50/x
x= 50*210 / 5
x= 2100
Answer: R12.20
Step-by-step explanation:
VAT in South Africa is 15% so if the flat rate is R93.57, the VAT amount can be found by finding the pre-tax flat rate:
93.57 = x + 0.15x
1.15x = 93.57
x = 93.57/1.15
x = R81.37
VAT is 15% of R81.37:
= 15% * 81.37
= R12.20