Answer:
○ d.
Step-by-step explanation:
<em>See my above explanation</em>
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To get the answer we can use proportion.
30----------100%
12-----------x
Cross multiply now
30x=12*100%
30x=1200% /:30 (divide both sides by 30)
x=40% - it's the percentage of cars which finished the race.
100%-40%=60% - it's the answer
45 + 2 × [ (45 × 60) + 25]
45 + 2 × 2700 + 25
70 + 5400
5470
To determine the number of possible arrangements for 6 out of 8, we should use combinations. That is
ₐC₆ = 8!/(6!2!)
Answer: b. Combination
we have to firstly apply the distance formula to find the length of sides of the triangle
distance formula =
So length AB =
BC=
AC =
Now perimeter = AB+BC+AC =
Plug in calculator
perimeter= 11.4 units