kgonzalez200061
08.11.2019 •
Mathematics
Emily is three years older than twice her sister mary’s age. the sum of their ages is less than 30.
let x represent mary's age.
which inequality represents mary’s possible age?
a. 0 < x < / = 9
b. 0 < x < / = 18
c. 0 < x < 18
d. 0 < x < 9
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Ответ:
2x+3+x<30
3x<27
x<9
The answer would be D.
Ответ:
40x = 260 - 20
40x = 240
x = 240/40
x = 6 fulltime employees needed