Let the three numbers be x, y and z. Then x+y+z=75.
z = 2x. y = x - 9.
Eliminate y and z by substitution: x + (x - 9) + (2x) = 75
Then 4x = 75 + 9, or 4x = 84. x = 21, y = 21 - 9 = 12, and z = 2(21) = 42.
Check: Do 21, 12 and 42 add up to 75?
Answer:
lana
Step-by-step explanation:
she saves 100$ in 2weeks more than 94
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C) f(n) = 5n-1
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Answer: I don’t know the answer but go on math-way(it’s a website) and it will give you the answer immediately
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