2 doesn't work, because that would give you 7/0 on the left.... therefore C and D are out. 4 works, giving .5=.5, so you don't have to test -5 since 4 and -5 is not an option.
Answer:
8 weeks
Step-by-step explanation:
week 1=64
week2=32
week3=16
week4=8
week5=4
week6=2
week7=1
week8=.5=0
Answer:
B.x2-4x=18
x2-4x+4=18+4
Step-by-step explanation:
When you complete the square your quadratic equation must be written in the standard form which is ax^2+bx+c.
First you are going to want to move your c term to the right (in this case move -18 to the right by adding 18 to both sides). This will get you x^2-4x=18. Now you are going to need to complete the square. To complete the square you divide the number in the bx term (in this case -4) by 2 and then square it. (-2^2=4 since a negative times a negative equals a positive). Now that you have 4 you are going to add it to both sides to get x2-4x+4=18+4.
Answer:
57%
Step-by-step explanation: