21hendlill
30.09.2019 •
Mathematics
What integer is closest to the value of 999/200 + 898/301 + 797/402 + 696/503?
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Ответ:
Answer = 11
999/200 + 898/301 + 797/402 + 696/503 = 11.3446735821
11.3 rounded is 11.
An integer is any whole number, e.x 1, 2, 3, 5, 10
Ответ:
x*6 + y*12.5 = 34
x+y = 3.5
for substitution we express one of variables in one of equations and put it in other equation.
x = 3.5-y
(3.5 - y)*6 + 12.5*y = 34
21 - 6y + 12.5y = 34
6.5y = 13
y = 2
x = 3.5 - y = 3.5 - 2 = 1.5
she ran for 1.5 hours and biked for 2 hours.
check:
1.5*6 + 2*12.5 = 9 + 25 = 34 = 34