Abiology class has a total of 45 students. the number females is 9 less than the number of males. how many males and how many females are in class?

There are 27 males & 18 females in the class

Step-by-step explanation:

Suppose,

m=number of males

f = number of females

Given that,

The number females is 9 less than the number of males

∴ f = m-9 ... ... ... (1)    

and total students =45

∴ m+f =45

⇒ m+(m-9) = 45              [From (1)]

Add like terms

2m-9=45

Add 9 to both sides

2m=45+9

⇒2m = 54

Divide both sides by 2

m = 54/2

∴m=27

∴There are 27 males in the class.

now,

f = m-9           [From (1)]

⇒f = 27-9       [∵m=27]

∴m= 18

∴There are  18 females in the class

y = 1

Step-by-step explanation:

While this is a value, its also an equation.