Amelia bought a pair of shoes for $135 and some t-shirts that cost $21 each. Define a variable and write an expression that can be used to determine how much money Amelia spent. If Amelia bought 4 t-shirts how much money did she spend before taxes.​

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Aline that intersects one of two parallel lines intersects the other also always sometimes never

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters