exam Maths Puzzle Numerical Ability

Ed invested twice as much in a 4% bond as he invested in a 3% bond. His total yearly interest from the two investments was $770. How much did he invest in each bond?

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20. Write the equation of the line which has y-intercept (0, 5) and is perpendicular to the line with equation y = -3x + 1.
A) y = -3x + 5
B) y = x + 5
C) y = 3x + 5
D) y = - x + 5 Okay..i am totally lost on this one. Help please

Write the proportion 14 is to 22 as 28 is to 44.