exam Maths Puzzle Numerical Ability

find the equation of a line that passes through the point (1,-4) and is parallel to the line 7x-6y=-4

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exam Other Question

Tell wether the number is prime or composite,if it is composite write prime factorization.

8. 345

Any help with this problem would be GREATLY appreciated:) I invested $18,000. Part of it was invested at 3% annual simple interst and the rest was invested at 4%. I earned $650 in interest for the year. How much did I invest at each rate?