Identificar la ecuación
la mitad de la edad de jorge equivale a la edad de marcela ; disminuida en 15años; por otro lado la suma de las edades de jorge y marcela es de 63 años cumplidos

The equations in the procedure

Jorge's age is 32 and Marcela's age is 31

Step-by-step explanation:

The question in English

Identify the equation

Half of the age of Jorge is equivalent to the age of Marcela decreased by 15 years; on the other hand the sum of the ages of Jorge and Marcela is 63 years of age.

Let

x ----->Jorge's age

y -----> Marcela's age

we know that

------> equation A

------> equation B

Solve the system of equations by substitution

Substitute equation B in equation A and solve for y

Find the value of x

therefore

Jorge's age is 32 and Marcela's age is 31

step-by-step explanation:

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: