9 .............. 100%
x................ 15%
100x = 15 . 9
100x = 135
x = <u>135</u>
100
x = 1,35
It'd be easier to do #18 if y ou were to break it up:
14* (first term + 14th term)
Sum from n=1 to 14 of n = S = ---------------------------------
14 2
14(1+14)
= ---------------- = 7(15) = 105
2
The sum of twice that is 210. The sum of "1 from n=1 to n=14" is just 14.
The final sum is 210 + 14 = 224 (answer)
3/4 of 3600..." of " means multiply
3/4 * 3600 =
10800/4 =
2700 <==
Answer:
cos (A+B+C)
Step-by-step explanation:
as A,B,C, are triangle we have A,B and C as 180
cost
