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
ElenaW [278]
3 years ago
10

Can someone please help me with this problem asap? Thanks!! :))

Mathematics
1 answer:
ivolga24 [154]3 years ago
8 0

Answer: \$4.34

Step-by-step explanation:

We have the following information:

Fredburguer F, milkshake M and an order of fries f costs \$3.72:

F+M+f=\$3.72 (1)

One Fredburguer is equal to a milkshake plus orders of fries:

F=M+2f (2)

Three milshakes is equal to a Fredburguer plus an order of fries:

3M=F+f (3)

And we are asked: If we have a Fredburguer, a milkshake and two orders of fries, how much do we have to pay?

F+M+2f=x (4)

Well with the first three equations we have a system of equations to solve. Let's begin by isolating F from (3):

F=3M-f (5)

Making (2)=(5):

M+2f=3M-f (6)

Isolating f:

f=\frac{2}{3}M (7)

Substituting (7) in (2):

F=M+2(\frac{2}{3}M) (8)

Isolating F:

F=\frac{7}{3}M (9)

Substituting (7) and (9) in (1):

\frac{7}{3}M+M+\frac{2}{3}M=\$3.72 (10)

Isolating M:

M=\$0.93 (11) This is the cost of a Milkshake

Substituting (11) in (7):

f=\frac{2}{3}\$0.93 (12)

f=\$0.62 (13) This is the cost of an order of frieds

Substituting (11) in (9):

F=\frac{7}{3}\$0.93 (14)

F=\$2.17 (15) This is the cost of a Fredburguer

Substituting (11), (13) and  (15) in (4):

\$2.17+\$0.93+2(\$0.62)=x (16)

Finally:

x=\$4.34 This is the cost of a Fredburguer, a milkshake and two orders of fries

You might be interested in
Ramon's hockey camp was four and a half hours long. If the camp ended at 11:45 a.m., what time did it start?
4vir4ik [10]

Answer:

the training started at 7:15 a.m

8 0
3 years ago
Read 2 more answers
I need help with this (9x+7)+(x+3)
coldgirl [10]

Answer:

9x^2+34x+21

Step-by-step explanation:

distribute all the numbers

3 0
3 years ago
Read 2 more answers
A taxi charges a fee, plus $1.80 per mile. how far can you go for $12?
EleoNora [17]

12: 1.8= 20/3. =>  the answer is 20/3 miles

7 0
3 years ago
Convert to a mixed numeral 49/10
morpeh [17]

Answer:

4 \times \frac{1}{9}

4 0
3 years ago
Read 2 more answers
Please help me this is for a grade
IgorC [24]

Answer:

b

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Javier rode his bike for a total of 41 minutes. Before lunch, he rode 1 minute less than 5 times the number of minutes he rode a
    9·1 answer
  • Write the decimal represented by each shaded square.
    10·1 answer
  • Simplify the expression. HELP, I WANT TO MAKE SURE I DO IT RIGHT
    8·1 answer
  • pls help. Natalia paid $38.95 for three medium-sized pizzas and a salad. If Natalia paid $11.98 for the salad, how much did each
    10·1 answer
  • Which expression is equivalent to 4 + 3 (5 + ×)
    6·2 answers
  • Tickets to Wrestlemania cost 600. the sales tax is 30% what is the final price
    5·1 answer
  • Mia spins two spinners. Each spinner has sections labeled A, B, and C. If each spinner lands in one of the lettered sections, wh
    7·1 answer
  • Divide the following numbers. -45/-5​
    11·2 answers
  • Prove that i" +in+l+in+2 +in+3 = 0 ​
    14·1 answer
  • PLSS HELP. <br> Simplify the expression. Write the answer using scientific notation (7x10^5)^2
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!