Answer:
and 
Step-by-step explanation:
Let
x -----> the number of polyphonic ringtones
y ----> the number of standard ringtones
we know that
-----> equation A
-----> equation B
Solve the system of equations by substitution
Substitute equation A in equation B and solve for y





Find the value of x
Answer:
The missing value in the solution to
the equation will be:
Step-by-step explanation:
Given the equation

As the value of y = -2 is given.
so substituting the value y = -2 in the equation to find the missing value

switch the sides








Therefore, the missing value in the solution to
the equation will be:
36=90/100 x a; 36=9/10 x a; a= 36/(9/10); a=360/9; a= 40
The Ice Cream shop served 40 customers.
Answer:
my best guess is A
Step-by-step explanation:
43560 sq. ft
Answer till 20 characters