5m : 100cm
= 5m : 1m
Therefore, the ratio is 5:1 which is answer c.
Answer:
the third one down
Step-by-step explanation:
R = 11-2m
S = n+5
T = -m-3n+8
---------------------------
Add up S and T to get...
S+T = (n+5)+(-m-3n+8)
S+T = n+5-m-3n+8
S+T = -m+(n-3n)+(5+8)
S+T = -m+(1n-3n)+(5+8)
S+T = -m+(-2n)+(13)
S+T = -m-2n+13
---------------------------
Subtract that result from R
R - [S + T]
11-2m - [-m-2n+13]
11-2m +m+2n-13
(-2m+m) + (2n) + (11-13)
(-2m+1m) + (2n) + (11-13)
(-1m) + (2n) + (-2)
-m + 2n - 2
---------------------------
---------------------------
The final answer is -m + 2n - 2
Here shall use the cosine rule:
let the length of the first diagonal be d;
thus
d²=8²+6²-2*6*8cos55
d²=64+36-96cos55
d²=44.93666211
d=6.7035
We know that two adjacent angles of parallelogram are supplementary, so since 180-55=125°, the length of the second diagonal d', we shall have:
d'²=8²+6²-2×8×6cos 125
d'²=64+36-96cos125
d'²=155.0633379
d=12.45244
Answers: (6.7035,12.45244)