Question

2a/10 + a/15 − 1/5 если a = 1 ; 5 ; 7.

Answer 1

2/10+1/15-1/5=6/30+2/30-6/30=2/30                                                                              10/10+5/15-1/5=30/30+10/30-6/30=34/30=1 4/30                                                           14/10+7/15-1/5=42/30+14/30-6/30=50/30=1 20/30                                                           Если что во 2 и 3 ответе это Одна целая и дробь.

Answer 2

To find the value of the expression 2a/10 + a/15 - 1/5 for the given values of a (1, 5, 7), we can substitute each value into the expression and calculate the result.

For a = 1: 2(1)/10 + 1/15 - 1/5 = 2/10 + 1/15 - 1/5 = 0.2 + 0.0667 - 0.2 = 0.0667

For a = 5: 2(5)/10 + 5/15 - 1/5 = 10/10 + 5/15 - 1/5 = 1 + 0.3333 - 0.2 = 1.1333

For a = 7: 2(7)/10 + 7/15 - 1/5 = 14/10 + 7/15 - 1/5 = 1.4 + 0.4667 - 0.2 = 1.6667

Therefore, when a = 1, the expression evaluates to approximately 0.0667. When a = 5, the expression evaluates to approximately 1.1333. When a = 7, the expression evaluates to approximately 1.6667.