book Maths Puzzle Numerical Ability

Find the equation of the line through the point (4, -2) and perpendicular to the line 3x - 5y = 10. Please help me with this one. Thank you.

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book Other Question

the measure of the second angle of a triangle is 21 degrees more than the measure of the first angle. The measure of the thirs angle is 15 degrees less than the measure of the firs what is the function for all these number
-6,-5
-4,-4
-2,-3
0,-2
2,-1
4,0
6,1
8,2
they all have to have the same function