Answer:
True
0.08 km/ 1 min = 1 mi = 1.61 km
answer rounds to 0.05
Answer:
n = 10
Step-by-step explanation:
3n1!/(n-4)! = (n-1)!/( n-1-5)
3n(n-1)(n-2)(n-3)(n-4) / N-4 -------- case1 ( cancel ( n-4) from top and bottom)
= (n-1)(n-2)(n-3)(n-4)(n-5)(n-6) / n-6 --------- case 2 ( Cancel n-6 from top and
bottom and also cancel n-1,
n-2, n-3 with case 1)
3n = ( n-4)(n-5)
3n = n² - 5n - 4n + 20
3n = n² - 9n + 20
0 = n² - 9n - 3n + 20
0 = n² - 12n + 20
0 = (n-2)(n-10)
n = 2 ( not valid) n = 10
Therefore n = 10
Find the unit rate :
4 notebooks for 7 bucks.......7/4 = 1.75 per notebook
10 folders for 2.50....2.50/10 = 0.25 per folder
so 5 notebooks = 5(1.75) = 8.75
6 folders = 6(0.25) = 1.50
for a total of : (8.75 + 1.50) = 10.25 <==
Answer: 5-6i
The rule is that if f(x) has real number coefficients, then a root of x = a+bi pairs up with its conjugate pair of x = a - bi. In this case, a = 5 and b = 6.
