exam Maths Puzzle Numerical Ability

complete the square
x^2+2x=8

x= ? and ?

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exam Other Question

write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of each equation.

(-5,-4),2x+3y=-1 Please help me solve this:

Suppose $1000 is invested at an annual rate of 5.7% compounded continuously.

A.What is the ammount after 6 years?
B.How long would it take for the ammount in the account to quadruple?