george6871
25.06.2019 •
Mathematics
There are 27 female performers in a dance recital. the ratio of men to women is 2: 3. how many men are in the dance recital?
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Ответ:
18 men
Step-by-step explanation:
The 3 part of the ratio relates to the number of female performers.
Dividing the number of female performers by 3 gives the value of one part of the ratio.
2 parts = 2 × 9 = 18 ← number of men
Ответ:
-2x+y=7
4x-y=-4 +
2x+0y=3
2x=3
divide 2
x=3/2
sub
2x-y=-7
2(3/2)-y=-7
3-y=-7
minus 3
-y=-10
negative 1 times both sides
y=10
(3/2,10)
(1.5,10)
B is ansre