Answer:
1st, 2nd, and 3rd models are correct
Step-by-step explanation:
Answer:
He has ran 250 metres.
Step-by-step explanation:
Since he runs 5 meters per second, you would obviously multiply 50 times 5, which is 250.
Ok, at most is basically less than or equal to the number, because it means that at most the number is equal to or less. The equation is 4W > 51
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Answer:
Step-by-step explanation:
Required
Equation of line
passes through 
In an equation of the form 
; the slope is 
So, by comparison;
The slope of 
is: 
From the question, we understand that the required equation is perpendicular to
This means that its slope is:
So, we have:
The line equation is:
Where:
So, we have:
Answer:
Step-by-step explanation:
Elvin and Carol together have Rs. 84. If Elvin gives Carol Rs. 32, then Carol will have twice as much money as Elvin. How much money, do Elvin and Carol have originally?
Let the amount of Elvin has originally = E
Let the amount of money Carol has originally be = C
E + C= Rs. 84
E + C = 84 ......Equation 1
If Elvin gives Carol Rs. 32, then Carol will have twice as much money as Elvin.
C + 32 = 2E
C = 2E - 32
We substitute into Equation 1
E + C = 84 ......Equation 1
E + 2E - 32 = 84
3E = 84 + 32
3E = 116
E = 116/3
E =
