Okay, so the rate is 1 job / hours, so:
1/3 + 1/7 (This covers both their work rates) = 1/n (n represents the time it take for them to work together)
Get the LCD:
7/21+ 3/21 = 1/n
10/21 = 1/n
Cross multiply:
10n = 21
n = 2.1
It will take them 2.1 hours, or 2 hours and 6 minutes
Answer:
Step-by-step explanation:
What number is 15% of 43?
6.45, or 6 if u round to the nearest whole number
43% of 300 is what number?
129
12% of what number is 43?
359
43 is what percent of 106?
40.6% or 41% when rounded
What percent of 43 is 6?
14%
Answer:
D is 12
Step-by-step explanation:
75 - 63 = 12 = D
Answer:
A = a + b / 2 x h
Step-by-step explanation:
Area is equal to side one plus side two divided by two then you multiply by the height of the trapezoid. Hope this helps!
Answer:
12.56 (13 if rounded)
Step-by-step explanation:
A=pi x r squared
A=2 squared multiplied by pi
A=4 times pi
plug into calculator should be about 12.56