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
Allisa [31]
2 years ago
7

A store is having a sale on walnuts and chocolate chips. For 7 pounds of walnuts and 9 pounds of chocolate chips, the total cost

is $37. For 5 pounds of walnuts. and 3 pounds of chocolate chips, the total cost is $17. Find the cost for each pound of walnuts and each pound of chocolate chips.​
Mathematics
1 answer:
Jlenok [28]2 years ago
6 0

Answer:

  • Walnuts  cost $1.75, chocolate chips cost $2.75

Step-by-step explanation:

<h3>Let the costs be:</h3>

  • Walnuts - x
  • Chocolate chips - y

<h3>Set equations as per question</h3>

For 7 pounds of walnuts and 9 pounds of chocolate chips, the total cost is $37:

  • 7x + 9y = 37

For 5 pounds of walnuts and 3 pounds of chocolate chips, the total cost is $17:

  • 5x + 3y = 17

<h3>Solve the system by elimination</h3>

Multiply the second equation by 3 and subtract the first equation, solve for x:

  • 3(5x + 3y) - (7x + 9y) = 3(17) - 37
  • 15x + 9y - 7x - 9y = 51 - 37
  • 8x = 14
  • x = 14/8
  • x = 1.75

Find the value of y:

  • 7*1.75 + 9y = 37
  • 12.25 + 9y = 37
  • 9y = 37 - 12.25
  • 9y = 24.75
  • y = 24.75/9
  • y = 2.75
You might be interested in
Solve: 3x-5y= -15 using y=mx+b method. Show steps
Sliva [168]
3x-5y=-15                                What you do to one side, you must do to the other.
-<u>3x        -3x
</u><u />-5y=-3x-15

<u>-5y</u>=<u>-3x</u> <u>- 15</u>
-5     -5   -5

Final Answer: y=3/5x + 3

4 0
3 years ago
Read 2 more answers
Find the common difference of the arthmetic sequence shown
SpyIntel [72]
Where is it shown? Please show a picture
5 0
3 years ago
Erin already has 7 plants in her backyard, and she can also grow 2 plants with every seed
Reil [10]
The answer is p=2s+7. Two plants can be grown from each seed packet, and Erin already has seven plants so you add that to the equation as well.
8 0
2 years ago
Find the value of given expression<br><br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B44%20%2B%2077%7D%20" id="TexFormula
Naily [24]

Answer:

11

Step-by-step explanation:

square of 44 + 77

1st step = go with the number that is inside the square

that will 44+77 = 121

now using the square root , you may think about which number multiple by himself give you 121

11×11 =121

so square root of 121 = 11

8 0
2 years ago
Read 2 more answers
Look at the triangle ABC. What length of side AB of the triangle? a.2 b.square root of 20 c.6 d.square root of 38
Y_Kistochka [10]
I think is b cuz I know foe a fact;)
4 0
3 years ago
Read 2 more answers
Other questions:
  • PLZ HELP FAST ASAP THANKS GUYS!!! WILL GIVE BRAINLIEST
    12·1 answer
  • Zohar is using scissors to cut a rectangle with a length of 5x – 2 and a width of 3x + 1 out of a larger piece of paper. The per
    11·1 answer
  • Fill in each blank for the function f(x) = 3x - 6.
    13·1 answer
  • The national debt of the united states is 970 billion dollars. the 1980 census showed 226,504,825 people. about how many dollars
    14·1 answer
  • You ask 200 randomly chosen students to name their favorite ice cream flavor. There are 1800 students in the school. Based on th
    13·1 answer
  • Find the area of this shape. Correct answer will Brainliest
    10·1 answer
  • True or false? ( help me please and thank you)
    6·2 answers
  • Please help!! Giving brainliest and extra points!! (Click on photo) (sorry if confusing!)
    9·1 answer
  • PLEASE ANSWER ALL!!
    9·2 answers
  • Find the diameter of a cirele with a circumference, c, of 27cm. HELP WILL GIVE BRAINLIST IF CORRECT ANSWER
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!