Answer:The number of minutes that Alexandra talked on her cell phone is 120
Step-by-step explanation:
A cell phone company charges a flat rate of 4.75 per month with an additional charge 0.19 per minute. Assuming the total number of minutes of call made for the month is represented by x and the total cost of x minutes of call is y, then
y = 0.19x + 4.75
To determine how many minutes that Alexandra talked on her cell phone if his monthly bill was 27.55, we would substitute y = 27.55 into the equation. It becomes
27.55 = 0.19x + 4.75
0.19x = 27.55 - 4.75 = 22.8
x = 22.8/0.19 = 120 minutes.
Answer:
x=-4, x=-1
Step-by-step explanation:
With the information given it should be 10.
4x+ 5= 45
-5. -5
4x=40
x=10
Answer: 38
Step-by-step explanation:
There is a rule between operations. I mean that you have to follow these stpes:
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
You can remember as "Please Excuse My Dear Aunt Sally" or PEMDAS.
In this question: 5x5+2.8÷2.2+3.3= 25+16÷4+3=25+4+9=38
