10) Find the value of x
(13x + 45)
(6x + 2) (12x - 40)
(19x + 3)

I'm not sure if these are individual or supposed to be combined, so I did it both ways just in case :)

Explanation:

For individual:

(13x + 45) ; x= 3.46

(6x + 2) ; x= 3

(12x - 40) ; x= 3.33

(19x +3) ; x= 6.33

For combined:

x= 4.42

i hope this helps! have a good day/night

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: