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Eduardwww [97]
3 years ago
12

Simplifying Variable Expression

Mathematics
1 answer:
andrew-mc [135]3 years ago
7 0
X + 3 • ( 10 + y ) - 7x - 4
x + 30 + 3y - 7x - y
x - 7x + 3y - y + 30
-6x + 2y + 30
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Use the functions f(x) = 4x − 5 and g(x) = 3x + 9 to complete the function operations listed below.
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3 0
3 years ago
A father is 25 years older than his son. 10 years ago, he was six times as old his son. What are their present ages?​
RoseWind [281]

Answer:

Present age of son = 15 years

& Present age of father = 40 years

Step-by-step explanation:

  • Let the son's present age be x years

  • -> Father's present age = (x + 25) years

  • 10 years ago:
  • Son's age = (x - 10) years

  • Father's age = (x +25 -10) = (x +15) years

  • It is given that: 10 years ago father was six times as old as his son

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  • -> x- 6x = - 60 -15

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  • -> Present age of son = 15 years

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3 0
2 years ago
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