En la especialidad de alimentación se preparan tortas para una recepción. Susana preparó 2 tortas de igual tamaño, una de piña y otra de manjar.

La de piña la dividió en 24 trozos iguales y la otra en 12 trozos iguales.

Don Juan, asistente a la recepción, comió 4 pedazos de torta de piña y dos de manjar.

a) Represente numéricamente cuánto de torta de piña comió don Juan

b) Represente numéricamente cuánto de torta de manjar comió don Juan

c) ¿Comió lo mismo de ambas?

d) ¿Cuánto comió en total?

e) Si cada trozo de torta de piña se vendiera a $400 y cada trozo de torta de manjar se vendiera a 1/3 de lo que se vende el de piña, ¿Cuánto debería pagar don Juan por lo que comió?

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.