1 pt for correct answer to part (b),4 pts for showing steps you took to get the correct answer and showing the formula with variable x that you used in part (a).
Note:correct answer to part (a) has only one variable, the variable x.
X represents how many more consecutive tries she needs to make in a row
to raise her overall average up to 90%.
NOTE:Must show your factoring work using either the big X strategy covered in class, or the quadratic formula method.Must show how you get factors. Not just give me factors.
A basketball player made 3 out of 4 free throws she attempted. She wants to know how many consecutive free throws more in a row she would have to make to raise her overall percent of successful free throws to 90%.
Call x the number of additional successful free-throws
So we have
3 + x
____ = .90 cross-multiply
4 + x
3 + x = .90 ( 4 + x) simplify
3 + x = .3.6 + .90x subtract 3, .90x from both sides
.1x = .6 divide both sides by .1
x = 6 = number of additional successful free-throws