(a) 0.83 x 0.737 (3 significant figures)
b) 5.178 20 (2 significant figures)
c) 7351 4.83 (4 significant figures)
(d) 731 +0.983 (3 significant figures)
le) 149.001 - 8.99 (3 significant figures)
6 6.814 - 72.35 (4 significant figures)

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

its totaly b

your welcome btw