Please help! Given angle SRT, construct a linear pair such that the supplement of angle SRT is twice as large as angle SRT

What expression is equivalent to 1/2(2+3x-6)

Prove that 16^4-2^13-4^5 is divisible by 11.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?