Which of the following equations is written in standard form? A. -2x=13
B. 3x+5y=-15
C. 1/2x+1/3y=1/5
D. -3x=13y=25

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Marking brainliest rewrite the equation x = 65 - 60p by factoring the side that contains the variable p.

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?