The equation y=19x relates proportional quantities x and y. what is the value of x when y is 4?
2 answers:
Answer: The required value of x is
Step-by-step explanation: Given that the following equation relates proportional quantities x and y :
We are to find the value of x when y is 4.
To find the value of x, we must substitute y = 4 in equation (i) and find the corresponding value of x.
From equation (i), we get
Thus, the required value of x is
You might be interested in
Consider such events:
A - slip with number 3 is chosen;
B - the sum of numbers is 4.
You have to count
Use formula for conditional probability:
1. The event consists in selecting two slips, first is 3 and second should be 1, because the sum is 4. The number of favorable outcomes is exactly 1 and the number of all possible outcomes is 5·4=20 (you have 5 ways to select 1st slip and 4 ways to select 2nd slip). Then the probability of event
is
2. The event consists in selecting two slips with the sum 4. The number of favorable outcomes is exactly 2 (1st slip 3 and 2nd slip 1 or 1st slip 1 and 2nd slip 3) and the number of all possible outcomes is 5·4=20 (you have 5 ways to select 1st slip and 4 ways to select 2nd slip). Then the probability of event
is
3. Then
Answer: