Answer:
Step-by-step explanation:
Number of calories in burger = x
Number of calories in hotdog = y
y = x - 220
x + 2y = 1,420
Substitution:
x + 2 * (x - 220) = 1,420
x + 2x - 440 = 1,420
3x = 1,420 + 440
x = 1,860 / 3
x = 620 calories
= 620 - 220
= 400 calories
3 x 5 divided by 1/3
45
it would be c
The significant figures of a number that carry meaningful contribution to its measurement resolution