exam Maths Puzzle Numerical Ability

One number is 5 more than another number. Three times the first plus twice the second is 30.Find the numbers.

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exam Other Question

Given f(x) = 5x^ - 3x + 1, how would I find f(-2)? find the x intercept for -x2+7x-11
it is x square

and x intercept for -x2 -2x-1
this is also x square