Answer:
6
Step-by-step explanation:
your answer would be approximately 6.604 but if you look at the first number it is the number 6 and you can see that it is one of your answer choices.
Marcus
Weeks Total Saved (x, y)
1 10 (1,10)
2 20 (2, 20)
3 30 (3 30)
4 40 (4, 40)
David
Weeks Total Saved (x, y)
1 15 (1, 15)
2 30 (2, 30)
3 45 (3, 45)
4 60 (4, 60)
Answer:
4
Step-by-step explanation:
Hello,
f(x)=x²-2x-15=x²-2x+1-16=(x-1)²-16
=(x-1-4)(x-1+4)=(x-5)(x+3)
Zeroes are x=5 or x=-3
