Answer:
and


Step-by-step explanation:
Let the variables be: x and y
The equations can be modelled as:
and

To solve for x and y, we have:
Make x the subject in 

Substitute
in 


Collect like terms


Divide both sides by 2

Substitute
in 


So, we have:

Answer:
800,000
Step-by-step explanation:
the number that we are rounding is 90,000 which is gonna make the seven go up to 8
Answer:
The answer is -14/25 or - 0.56
Answer: 
Step-by-step explanation:
Given : The total number of cards in a deck = 52
Number of red cards = 26
There are two types of red cards : diamond and heart.
Number of diamond cards = 13
The probability that the first card is a diamond :-

Since diamond is also a red card.
Now, the total cards left = 51
The number of red cards left = 12
The probability that the second card is a red card (without repetition) is given by :-

Now, the probability of choosing a red card for the second card drawn, if the first card, drawn without replacement, was a diamond :-
