Una sustancia es retirada de un horno y llevada a un área de enfriamiento que mantiene una temperatura estable de 43°C, a los 15 y 30 minutos después de haberse iniciado el enfriamiento se realizaron dos registros de temperatura, que arrojaron como resultado 285°C y 252 °C, respectivamente. Determinar: a) La temperatura inicial de la sustancia. b) En que instante la temperatura del cuerpo es de 80 °C.

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24

well the answer to that is xoxoxo

step-by-step explanation: