Answer:
x = r cos theta and y = r sin theta
Step-by-step explanation:
cos theta = x / r so:-
x = r cos theta
and sin theta = y / r, so
y = r sin theta
7m+2n=21
-7m -7m
<u>2n</u>=<u>21-7m</u>
2 2
n=<u>21-7m
</u> 2
<u>
</u>10m+4(21-7m/2)= -10
<u />-10m -10m
4(21-7m/2)= -10-10m
(84-28m/2)= -10-10m
x2 x2
84-28m = -20-20m
+20+28m +20+28m
<u>104</u> = <u>8m
</u>8 8
m=13
10(13) + 4n = -10
-130 -130
<u>4n</u> = <u>-140
</u>4 4
<u>
</u>n= -35
If anything is unclear please feel free to ask.
Answer:
The 9th and 11th students are also boys.
Step-by-step explanation:
Every other student is a boy. Since the 7th student is a boy this means the 8th student is a girl.
You can also think of it with odd numbers. Every odd numbered student is a boy.
Answer:
6.2
Step-by-step explanation:
Actual value: 6.15636257