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

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

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

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2