Step-by-step explanation:
45+90+x=180
135+x=180
x=180-135
x=45
Answer:40
Step-by-step explanation:
dividing 1200 by 600 is 2
so you would do the same for 80
Answer:
x: work a woman can do in 1 day
y: work a girl can do in 1 day
Then
2x + 7y =1/4
4x + 4y =1/3
4x + 14y =2/4 (1)
4x + 4y =1/3 (2)
=> Let (1) - (2), 10y =2/4-1/3 <=>10y = 1/6 <=> y = 1/(6x10) = 1/60 (work)
=> From (2),4x = 1/3 - 4x1/60 => 4x = 16/60 => x = 4/60 (work)
=> 1 day, a woman and a girl can do: 1/60+4/60 = 5/60 =1/12 (work)
Then, the day required for a woman and a girl to complete work: 12 days
The equation needed is (Surface area of a cube)
A=6×a<span>²
Therefore your answer would be...
</span>194.94 in.<span>³</span>
