3x + 2y = a 5x + y = b eliminating the variable y from the system of equations results in -7x =
a) a - 2b
b) 2b - a
c) a + 2b

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?