Please help me solve all of these if right ill give you 3a 1 = 2a

8a 2 = 12 + a

3x + 6 = x 3

2x + 7 = 11 2x

8x + 10 = 3x

7a + 4 = 3a

7x + 8 = 11x

21x + 11 = 10x

5x + 5 = 14 + 2x 3

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

(30 points). the population of a city is 45,000 and decreases 2% each year. if the trend continues, what will the population be aer 15 yrs

(co 3) the times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard deviation of 9.4 minutes. a random sample of 25 customers has a mean of 36.1 minutes or less. would this outcome be considered unusual, so that the store should reconsider its displays? no, the probability of this outcome at 0.035, would be considered usual, so there is no problem yes, the probability of this outcome at 0.035, would be considered unusual, so the display should be redone no the probability of this outcome at 0.359 would be considered usual, so there is no problem yes, the probability of this outcome at 0.965 would be considered unusual, so the display should be redone