Nicole and adam are each saving money for a car. the total amount of money nicole will save is represented by the function f (x)
= 36 + 4x . the total amount of money adam will save is given by the function g (x) = x2 + 15. after how many weeks, x, will they have the same amount of money saved? explain how you arrived at your answer.
For this case we have the following functions: f (x) = 36 + 4x g (x) = x2 + 15 By matching both functions we have: f (x) = g (x) 36 + 4x = x2 + 15 Rewriting we have: x2 + 15 - 4x - 36 = 0 x2 - 4x - 21 = 0 Solving the polynomial we have: (x-7) (x + 3) = 0 x = -3 x = 7 Taking the positive root we have: x = 7 Answer: They will have the same amount of money saved after: x = 7 weeks
So 36% of x is 18 percent is parts out of 100 36%=36/100=0.36 'of' can be translated as muitiply 0.36 times x=18 divide both sdies by .36 x=50 the number is 50