If two fractions have the same denominators, then just simply add up the numerators together and keep the denominator.
Examples:

Answer:
UB: 375
Step-by-step explanation:
370mm to 2 sig figs..
UB: 375
LB:365
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Answer:
I am guessing it is 67 as for maybe the whole thing is 180 degrees. So 180 subtracted by 67 and 46 equals 67!!!
I think you need to retype this one. The formatting makes this question difficult to understand.
The intercept can be found when all other variables are equated to zero.
x-intercept when y = 0 and z = 0: 8x + 6*0 + 3*0 = 24 gives x = 3
y-intercept when x = 0 and z = 0: 8*0 + 6y + 3*0 = 24 gives y = 4
z-intercept when x = 0 and y = 0: 8*0 + 6*0 + 3z = 24 gives z = 8
The intercepts are (3, 0, 0), (0, 4, 0), and (0, 0, 8).