Atest tube contains a saturated solution of silver bromide. which reagent, from the four below, will produce the largest amount of solid precipitate once it is added to the test tube? view available hint(s) a test tube contains a saturated solution of silver bromide. which reagent, from the four below, will produce the largest amount of solid precipitate once it is added to the test tube? concentrated hno3 concentrated nh3 0.2 m caf2 concentrated hbr

linda: 3 ; laura: 15

step-by-step explanation:

note that linda + laura's age is 18, and that linda is 12 years younger than her sister.

let "linda" = x , "laura" = y:

x + y = 18

x = y - 12

first, plug in y - 12 for x in the first equation:

(y - 12) + y = 18

simplify.

2y - 12 = 18

isolate the variable (y). note the equal sign, what you do to one side, you do to the other. do the opposite of pemdas. first add, then divide.

2y - 12 (+12) = 18 (+12)

2y = 18 + 12

2y = 30

(2y)/2 = (30)/2

y = 30/2

y = 15

next, plug in 15 for y in the second equation (the other equation would work too).

x = y - 12

x = (15) - 12

x = 3

linda's age is 3, laura's age is 15.

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a electronegativity decreases beacuse the size of nucleus is bigger.