![owlette2001](/avatars/46012.jpg)
owlette2001
13.03.2021 •
Mathematics
2). Write an equation and solve. You will not be given credit for your answer if you do not include your equation! This month's cell phone bill was for $15.27 more than last month's cell phone bill. If this month's phone bill is for $72.50, how much was last month's cell phone bill?
Solved
Show answers
More tips
- C Computers and Internet Keep Your Mouse Pad Clean: The Right Way to Clean It?...
- F Food and Cooking Homemade French Fries: The Ultimate Guide...
- D Dating, Love, Relationships How Long Can Love Last?...
- A Auto and Moto Mastering One-Movement Parking: All You Need to Know...
- C Computers and Internet How to Properly Order Clothing from International Online Stores...
- H Health and Medicine Headache: A Comprehensive Guide to Treatment...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- A Auto and Moto Discovering the Leader: What is the Most Expensive Car in the World?...
- F Food and Cooking How to Quickly Put your Child to Sleep?...
- C Computers and Internet How to Create a Website for Free and Easy?...
Answers on questions: Mathematics
- M Mathematics As compared to its first year of operation, abc company grew 8% in the second year and an additional 2% per year for the next two years. if total growth for years 2-4 was $45,000 over...
- M Mathematics MAX is equiangular If m...
- M Mathematics If a sailboat has a triangle sail with two perpendicular sides and no congruent sides, which two terms could be used to describe the triangle shape of the sail. select two answers....
- S Spanish A partir del caso planteado en la semana 4, presenta una propuesta de normativa que se debe aplicar en la granja de cerdos....
- M Mathematics Find the radian measure of an angle of -280° a) (9/-14π) b) (-14π/9) c) (9π/-14) d) (-14/9π)...
- B Business Anheuser-Busch, InBev NV, the maker of Bud Light, proposed a merger with Modelo, the maker of Corona. At the time of the proposed merger, AB InBev NV held 39% of the beer market, Miller/Coors...
- C Chemistry The formation of tin IV chloride is as follows; the change in enthalpy is (AH) is -511 kJ/mole. Sn (s) + 2 C12 (9) -- SnC14 (1) + Heat The reaction would be considered? A. Endothermic,...
Ответ:
Explanation:
We'll make x the value of last month's phone bill. So if lets say x = 50, this means that last month's phone bill was $50. We don't know yet if x = 50 is the actual solution or not.
We're told that "This month's cell phone bill was for $15.27 more than last month's cell phone bill". This means this month's bill, in terms of x, is x+15.27 dollars. Whatever x is, we add 15.27 onto it getting this month's bill. This works because x is really a placeholder for a number.
Going back to x = 50, that would mean this months bill is x+15.27 = 50+15.27 = 65.27 dollars. We can see that we don't reach 72.50 that we're told the current months bill actually is. Since we don't have a match, this means x = 50 is too small. We can guess and check our way to hopefully land on the answer. However, using algebra is the most efficient method.
The equation we need to solve is: x+15.27 = 72.50
This is because x+15.27 represents this month's bill and so does the 72.50, as your teacher gave in the instructions.
To solve this equation, we'll undo the "plus 15.27" to isolate x fully. The opposite of addition is subtraction. We'll subtract 15.27 from both sides
x+15.27 = 72.50
x+15.27-15.27 = 72.50-15.27
x = 57.23
Last month's phone bill was $57.23
As a check, adding 15.27 onto last month's bill should get us to 72.50
x+15.27 = 57.23+15.27 = 72.50
It works out, so we've confirmed the answer.
Ответ: