Which variable expression represents the phrase “3 times the sum of twice a number and 3”? i think the answer is d. but i'm not 100% sure. note: answer choices below

The area of square garden is 300m squared. how long is the diagonal?

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?

What is the length of ac in the given triangle?