exam Maths Puzzle Numerical Ability

Write the equation of the line through (2, 3) and perpendicular to y = -2x +
4 in slope-intercept form (y = mx + b).

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exam Other Question

simplify the expression. Assume that all variables represent real numbers.

Please show me how to get the answer. Thanks!

3 into (square root of) 80x^9y^11

A.) 4x^3y^5 3 How do I find the domain and the range for the function f(x)=ex
and express both in interval notation.

NOTE: the (x) following the (e) should be written like expanded notation, I just do not know how to do that on the computer.