-- 44% of the people surveyed preferred WWCN.
-- 22% of the people surveyed preferred WANR.
-- The difference is 22% of the people surveyed.
That's how many MORE of the people surveyed
preferred WWCN than WANR.
-- 22% of the people surveyed is 22% of 400 people = 88 people .
Strange as it may seem, "88" is not one of the choices.
Go figure !
And how come the breakdown of the answers to the survey
adds up to 103% ? Did 12 of the surveyed people have
more than one favorite ? ?
4x + 7y = 1 ⇒ 12x + 21y = 3
3x + 10y = 15 ⇒ <u>12x + 40y = 60</u>
<u>-19y</u> = <u>-57</u>
-19 -19
y = 3
4x + 7(3) = 1
4x + 21 = 1
<u> - 21 - 21</u>
<u>4x</u> = <u>-20</u>
4 4
x = -5
(x, y) = (-5, 3)
B^2c^-1
-4^2(2)^-1
-4^4^-1
-4^1/4
1 + i
Maria does 1/40th of the driveway per minute. Tom does 1/35th. Together, they do:
1/40+1/35=75/1400=3/56
1/3/56=56/3, or 18&2/3 minutes working together
☺☺☺☺
