1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
uranmaximum [27]
3 years ago
13

Cedric and Zelda went shopping at Price buster buster Cedric Bought to jumbo rolls of aluminum foil and three packages of AA bat

teries for a total cost of $21 Zelda Bought 5 identical jumbo rolls of aluminum foil and two identical packages of AA batteries for a total cost of $25 find the cost of one roll of aluminum foil and find the cost of one package of AA batteries
Mathematics
1 answer:
Lera25 [3.4K]3 years ago
3 0
Let f and b be the cost of foil and batteries respectively.  We are first given that:

2f+3b=21  subtract 3b from both sides

2f=21-3b  divide both sides by 2

f=(21-3b)/2

Then we are given:

5f+2b=25, using f found above in this equation gives you:

5(21-3b)/2+2b=25

(5(21-3b)+4b)/2=25  multiply both sides by 2

5(21-3b)+4b=50  carry out indicated operations on left side

105-15b+4b=50 combine like terms on left side

105-11b=50  subtract 105 from both sides

-11b=-55  divide both sides by -11

b=5, since f=(21-3b)/2

f=(21-3*5)/2

f=3

So batteries cost $5 and foil cost $3.
You might be interested in
What is the angel type of <x and <y​
erica [24]

Answer:

Angle x = Angle y

Step-by-step explanation:

if the shown lines are parallel then, the given pair is alternate interior angle pair which is equal.

hence, Angle x = Angle y

5 0
3 years ago
Matt found a five dollar bill what is integer
77julia77 [94]
The integer would be
positive 5
5 0
4 years ago
Which of the following is an example of a physical property?(55 points)
Bas_tet [7]
It’s c I think sorry if I’m wrong, I did this lesson long time ago
4 0
3 years ago
What is the rate of change for the set of ordered pairs?
Elden [556K]
THE ANSWER IS C IF I RECALL DOING THIS
6 0
4 years ago
What is the area of this triangle?
Alex17521 [72]
Well, you would have to mutiply the length and width and then divide that by 2 to get your area for the triangle
3 0
3 years ago
Read 2 more answers
Other questions:
  • Find the slope for 5x+y=8
    13·1 answer
  • I need help on this problem I have 6 minutes left to solve this!.”
    7·2 answers
  • There are 5 marbles in a bag. 3 are green, and 2 are yellow. You draw a marble, do not replace it, and then draw another. What i
    11·1 answer
  • Which of the following represents the zeros of f(x) = 6x3 − 29x2 − 6x + 5? (1 point)
    10·1 answer
  • How many mililiters are in 2.5 liters?
    10·2 answers
  • Employees at a hardware store are receiving pay raises. Dan’s hourly pay rate is increasing from $12 to $14. Kathy’s hourly pay
    8·1 answer
  • Doug’s pet gerbil eats 1/8 pound of food a day doug buys a 3/2-pound bag of food for his pet how many days will the food last
    5·1 answer
  • Rhonda's backyard has a rectangular patio that is 12.5 feet long,
    9·1 answer
  • !!PLEASE HELP ME I'M BEGGING YOU!!
    5·1 answer
  • #83 will give brainliest with best response!​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!