Answer:
Step-by-step explanation:
A. False. The probability of drawing a green marble twice is even smaller (It may be true though depending on what the question is asking, if it is asking the chance of drawing a green marble second is the same as the 1st chance, then yes it is True.
B.False
C. False
D.True, 1/3*1/3 (Simplified version of 6/18*6/18) is 1/9
E. False (Although this may be true, again depending on the type of question)
F. False
In total, they would need 4 pumps. If we divide 55 by 17, we get just more than 3. This little more would need an entire pump. So the answer 4 total, 3 added
Answer:
it would be b
Step-by-step explanation:
Answer:
-26 i think
Step-by-step explanation:
Answer: a). 3kg b). 1kg
Explanation:
let x be the mass of nails
let y be the mass of the box
We can write an equation base on the information:
x + y = 4kg
3x + y = 10kg (screw is 3 times heavier than nail)
We can solve this system of equation using elimination method to find x:
3x + y = 10
x + y = 4
——————
3x + y = 10
-1(x + y = 4)
——————
3x + y = 10
-x - y = -4
——————
2x = 6
x = 6/2 = 3
Now that we have x we can find y:
3x + y = 10
3(3) + y = 10
9 + y = 10
y = 1
