Determina cuáles de las siguientes expresiones son ecuaciones y cuales no, Justifica tu respuesta.

a. 40 + x = 15

b. 27 + 40 + 16 = 83

C. P. -89 = 46

d d. {[3 + 2 + (9-7) 4 (3+ 4)}}

e. m + 25 + 32 91

f. 32 +251 - 361-55

8. y - 3

Zahra wants the equation below to have an infinite number of solutions when the missing number is placed in the box.

The john nash mall used 17,4000 kilowatt hours in may, with a peak load of 92 kilowatts. the demand charge is $5.95 per kilowatt, and the energy charge is $0.08 per kilowatt hour. the fuel adjustment charge is $0.017 per kilowatt hour. what is the total electricity cost for may?

Find the sum of the given arithmetic series. 24 + 17 + 10 + 3 + + (–39)