Ralph is 3 times as old as sara. in 6 years, ralph will be only twice as old as sara will be then. find ralph's age now.

which of the following equations could be used to solve the problem?
x + 6 = 2(3 x + 6)
3 x + 6 = 2 x + 6
3 x + 2 x
3 x + 6 = 2( x + 6)

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

You have 17 cats that live in houses on your street, 24 dogs, 3 fish, and 4 hamsters. what percent of animals on your block are dogs?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)