Answer:
Line 3
Step-by-step explanation:
→ Calculate gradient

Answer: 18/5 hours, or 3.6 hours
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Work Shown:
x = amount of time it takes Blake to do the job by himself
y = amount of time it takes Ned to do the job by himself
z = time it takes if they worked together
In this case,
x = 9 and y = 6
Use those values to find z.

Answer:
-(2)(43)
Step-by-step explanation:
Your "polynomial" is the constant 12 -161 +63 = -86. It has factors ...
-86 = (-1)(2)(43)
Answer:
8
Step-by-step explanation:
51 + 4x + 7 = 90 - combine like terms
58 + 4x = 90 - subtract 58 from each side
4x = 32 - divide both sides by 4
x = 8
2/3 is equivalent to 4/6. Other fractions are 6/9, or 8/12.