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
kvasek [131]
3 years ago
10

Maureen spent sh 207 to buy 7 exercise books and 4 pens while Sharon spent sh 165 to buy 5 exercise books and 5 pens of same typ

e.Find the cost of each item
Mathematics
1 answer:
Umnica [9.8K]3 years ago
3 0

Answer:

  book 25; pen 8

Step-by-step explanation:

If we let b and p represent the cost of a book and a pen, respectively, then the two purchases can be written as ...

  7b +4p = 207

  5b +5p = 165

Multiply the second equation by 4/5 and subtract the result from the first equation:

  (7b +4p) -4/5(5b +5p) = (207) -4/5(165)

  3b = 75 . . . . simplify

  b = 25 . . . . . divide by 3

Dividing the second equation by 5 gives ...

  b + p = 33

Solving for p, we have ...

  p = 33 -b = 33 -25 = 8

The cost of an exercise book is 25; the cost of a pen is 8.

You might be interested in
What is 3=7(4 - 2u)-6u
alisha [4.7K]

Answer:

u = 5/4

Step-by-step explanation:

to evaluate for the value of u we would simply open the bracket and then evaluate for the value of u by collecting the like terms together.

solution

3=7(4 - 2u)-6u

3 = 28- 14u - 6u

collect the like terms

3 + 14u + 6u = 28

20u = 28 - 3

20u = 25

divide both sides by the coefficient of u which is 20

20u/20 = 25/20

u = 5/4

5 0
3 years ago
Read 2 more answers
Please help! Only answer if you know how to do it.
Mashutka [201]
Your answer would 699.3 that is it
7 0
3 years ago
Simplify square root of 5 open parentheses 10 minus 4 square root of 2 close parentheses
liraira [26]
None of the above, it's a hard one alright!
5 0
3 years ago
A bag of marbles has 2 blue,3 green, 4
Aleksandr-060686 [28]
The correct answer is 1:2
5 0
3 years ago
The set of all numbers less than or equal to -1
kolbaska11 [484]

Answer:

-10,-100,-8,-7,-2,-4,-5,-20,-6,-3,-7

3 0
2 years ago
Other questions:
  • 5 lbs equals how many ounces
    7·1 answer
  • What is 50 written as a product of its own prime factor
    8·1 answer
  • A pitcher contains 1.75 liters another contains 1800 milliters of apple juice which one has more juice
    14·2 answers
  • Stefan sells Jim a bicycle for $175 and a helmet for $17. The total cost for Jim is 160% of what Stefan spent originally to buy
    14·1 answer
  • PLEASE HELP!!!! I DON'T KNOW THE ANSWERS!!
    14·2 answers
  • Ira described the data on a dot plot as having a cluster from 0 to 3, a gap at 4, a peak at 1, and being skewed right. Which dot
    7·2 answers
  • ( 2 – 3x – 10 ) ÷ ( x – 5 )​
    6·1 answer
  • Please helppp!!! Is the set of positive irrational numbers closed for the operation of division? If not, give a counter-example.
    12·2 answers
  • Pleaseeee helpppppp !!!!!!! Will mark Brianliest !!!!!!!!!!!!!!
    8·1 answer
  • Which two polygons is this polygon subdivided into?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!