Answer:
-20x -27 is the required expression.
Step-by-step explanation:
whenever we are to solve the system of equations by substitution method we have to write one variable in the form of other so as to get the value of unknowns
here, we are given two expressions:
And
We have to substitute x in terms of y because the equation should be equivalent to y we will put in
we will get:
is the expression we will get after expression equivalent to y.
The answer to this question is 40
Answer:
Step-by-step explanation:
let's call B the event that a woman was wearing a belt and C the event that a woman was carrying a purse.
The probability P(B/C) that a woman was wearing a belt, given that the woman was also carrying a purse can be calculated as:
P(B/C) = P(B∩C)/P(C)
Where P(C) is the probability that a woman was carrying purse and P(B∩C) is the probability that the woman was both carrying purse and wearing belt.
So, P(C) is calculated as:
P(C) = 18 / 30 = 0.6
Because there were 30 women that walked by in an hour and of those women, 18 were carrying purses.
At the same way, P(B∩C) is equal to:
P(B∩C) = 6 / 30 = 0.2
Finally, P(B/C) is equal to:
P(B/C) = 0.2/0.6 = 0.3333
Answer:
Step-by-step explanation:
7g = x miles
7 grade is x miles
8g = 7g + 15%
8 grad is 15% more than 7 grade
put what 7g is equal to into the 8g equation
8g = x + 15%