Y=1/2x-2
Since y is 2 less than half of x, you subtract to from 1/2x to equal y.
Step-by-step explanation:





A = a+b / 2
G = √( a b )
G = √ ( A H ) / ² ( we will square both sides of the equation )
G² = A H
H = G² / 2
Answer:
Siw's age is 10 years old
Mona's age is 8 yers old
Mother's age is 40 years old
Step-by-step explanation:
Let
x ----> Siw's age
y ---> Mona's age
z ---> Mother's age
we know that
Siw is a fourth as old as mother
so
----> equation A
Mona is a fifth as old as mother
so
----> equation B
Mother is 22 years older than the two girls together.
so
----> equation C
substitute equation A and equation B in equation C

solve for z
Multiply by 20 both sides to remove the fraction


Find the value of x

Find the value of y

therefore
Siw's age is 10 years old
Mona's age is 8 yers old
Mother's age is 40 years old