How do you solve by elimination/linear combination. a. 3x+4y=17 5x-4y=7

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?