X - Ernie, y - Kaylin, z - Tria
x = y + 121.50
z = 3y - 35
x + y + z = 579
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z = 3 y - 35 => - 3 y + z = -35
y + 121.50 + y + z = 579
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- 3 y + z = - 35 / · ( -1 )
2 y + z = 457.50 (we will use the elimination method)
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3 y - z = 35
2 y + z = 457.50
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5 y = 492.5, y = 492.5 : 5 = 98.5
z = 3 · 98.5 - 35
z = 260.5
Tria earned $260.5
The only ones that would work are if the factor is composite and if 1 is added to it it can be divided into 48. So 15 would work. The factor 15 is composite, and if 1 is added it can be divided into 48.Therefore the son is 15.
If the coin is fair, the probability of a success on each roll is 0.5.
1/2 first day
last day is 1 and 1/4
1/2=2/4
1 and 1/4=5/4
2/4+how many 1/4=5/4
answer is 3 of them
add 1 moe for the firs tday
3+1=4
4 days