exam Maths Puzzle Numerical Ability

If Saliu can paint a house in 8 hours, and Yemi can paint the same house in 16 hour,Bobo can paint the same house in 5 hours, how long will it take for all of them to paint the house together?

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exam Other Question

If $1,000.00 is deposited into an account paying 3% interest compounded annually (at
the end of each year), how much money is in the account after 5 years? (Round to the
nearest Please help!

The problem is:

Solve the system by using the substitute method. Determine whether the equations are independent, dependent or inconsistent.

Eq 1 states: 3x + 5y = 25
Eq 2 states: x -2y = -10