Answer:
3
Step-by-step explanation:
8-5= 3
11-8= 3
14-11= 3
First, let x be the number of hours it will take for Hector to finish the same job alone. This means that every hour, Hector can do 1/x of the job. The amount of work done by Shawn and Hector in 6 hours should be equal to 1 complete work. This can be expressed as,
(1/9 + 1/x)(6) = 1
The value of x is 18. Thus, Hector can to 1/18 of the job in one hour.
Answer:
20. is B (second one)
21. is A (first one)
Step-by-step explanation:
Divide both sides by the coefficient 6 to get p <span>≥ −24/6 = -4
p </span><span>≥ −4</span>
3 × 4 × 5 = 20 · x
12 × 5 = 20x
60 = 20x
20 20
3 = x
The missing number in a sentence is 3.
