exam Maths Puzzle Numerical Ability

Simplify the expression (-7)+6+[-(2-3)]

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exam Other Question

Could someone please explain how to work out this problem?
Write the equation of the line with slope -2 and passes through the point (-1,5)
Then write the equation in standard form.
Thanks
Name the values of the characteristics of the following quadratic equations

2. f(x) = 3(x - 5)^2 + 2 3. g(x) = -4x^2 - 8x - 3
axis of symmetry,
vertex
Max or Min point
Range
x-intercepts
amplitude