Express 1 by 5 + I 2 by 5 - 4 + I 5 by 2 in a + ib form
the average number of calories in a regular-size bagel is 240.if the standard deviation is 38 calories,find the range in which at least 75% of the data will lie.use chebyshev's theorem
solve 2x+3y=11 and 2x-4y=-24 and hence find the value of m for which y=mx+c
the price of a product was K4000 and the annual was 2000 units when the price was reduced to K3000, the annual demand increased to 4000 units. Calculate the price elasticity of demand for the price change given