Answer:
x²-8x-1=0
comparing above equation with ax²+bx+c=0
a=1
b=-8
c=-1
x=
=(--8+-√(64-4×1×-1)/2×1
=8+-√(64+4)/2
taking positive
x=(8+√68)/2=2(4+√17)/2=4+√17
taking negative
x=(8-√68)/2=2(4-√17)/2=4-√17
None of them are correct.
Answer: Total number of pairs =872
Step-by-step explanation:
Since we have given that
Number of pairs of skates during the month of April =218
Number of pairs of skates during the month of May =3 × 218=654
As we know that total means altogether in which we perform the additive operation.
Total pairs of skates the skating rent during April and May = 218+654=872
∴ Total number of pairs =872
Answer:
Work individually or in teams of two to construct and launch paper rockets using a teacher-built PVC-pipe launcher.
Following the flight of their rocket, calculate the altitude their rocket achieved.
Based on the flight performance of their rockets, analyze their rocket designs, modify or rebuild them, launch again, and calculate the altitude achieved to determine if their changes affected the performance of the rocket.
Conclude the activity by writing a post-flight mission report.
Materials
