A radio tower is located 375 feet from a building. From a window in the building, a person determines that the angle of elevation to the top of the tower is 41° and that the angle of
depression to the bottom of the tower is 36º. How tall is the tower?

Use the matrix-column representation of the product to write each column of ab as a linear combination of the columns of a.

/is used for a fraction 1) if x = 2/3 and y = 3/4, what is the value of (x + y) (x/y) expressed as a common fraction? 2) what is the least positive integer greater than 1 that leaves a remainder of 1 when divided by each of 2, 3, 4, 5, 6, 7, 8, and 9? 3) the ponde family's powerjet pumps 420 gallons of water per hour. at this rate, how many gallons of water will it pump in 45 minutes? 4) kim's insurance company pays 80% of the cost of all prescription medication she purchases in a year beyond the first $250 worth of prescriptions. her prescriptions for this year cost a total of $570. how many dollars of this amounts will kim's insurance company pay?

3x + 4y = 5 x- 3y = -7 solve by substitution