exam
Maths Puzzle
Numerical Ability
The sum of ages of 4 family members is 68. Four years ago the sum was 53. How old is the youngest family member? Please EXPLAIN!
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exam Other Question
Jenny inherits $42,900 and invests it for a year in two stocks. Stock A earns 12.5% annually and stock B earns 8.5% annually. How much did she invest in each stock if stock B earned three-quarters as much as stock A?
Solve x^2 + 7x -2 = 0
And, then find the x-intercepts of f(x) = x^2 + 7x - 2.
I appreciate the help, I am struggling with these problems and they do not come from a textbook.