Una juguetería vende 52 muñecas, 23 carros y 70 pelotas el día sábado. El día domingo vende 48 muñecas, 30 carros y 74 pelotas. Los precios por unidad de cada uno de los artículos son respectivamente, $8.50, $12.30 y $5.80. a. Escribir una matriz de tamaño 2×3 que represente la cantidad de artículos vendidos en los dos días. b. Escribir un vector columna que represente el precio por unidad de cada artículo. c. Hallar el vector columna cuyos elementos muestren los ingresos obtenidos por concepto de ventas los días sábado y domingo respectivamente

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?