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
enyata [817]
3 years ago
9

David bought 3 dvds for for books for $40 at a yard sale in about one dvd and six books for $18 how much did each dvd cost

Mathematics
1 answer:
pentagon [3]3 years ago
5 0
The system:
3 x + 4 y = 40
x + 6 y = 18,
-------------------
x = 18 - 6 y
3 ( 18 - 6 y ) + 4 y = 40
54 - 18 y + 4 y = 40
54 - 40 = 18 y - 4 y
14 = 14 y
y = $1
x = 18 - 6
x = $12
Answer: Each DVD costs: $12.
You might be interested in
Helena wants to find the perimeter of the graphed quadrilateral ABCD.
gizmo_the_mogwai [7]
Side cd will do the trick

5 0
4 years ago
Read 2 more answers
What does 3/5 plus 1/4 equal
Lynna [10]
3/5+1/4=17/20

12/20+5/20=17/20
5 0
4 years ago
Read 2 more answers
Maria just put 23.38 gallons of fuel into her car. There were 1.7 gallons in the car to begin with. How much fuel is in Maria's
natulia [17]

Answer:

25.08

Step-by-step explanation:

I just added 1.7+23.38

6 0
3 years ago
Math really isn’t my best subject. help me
Amiraneli [1.4K]

Answer:

not straight 2,4

Step-by-step explanation:

6 0
4 years ago
An artical fills 1/2 of a magazine page. A corresponding photo takes up 3/8 of the article. How much of the page is taken up by
Fofino [41]

Answer:

3/16

Step-by-step explanation:

If an article takes half of the page then;

1article = 1/2 of a page

3/8 of the article = x

Cross multiply

1×x = 1/2×3/8

x = 3/(2×8)

X = 3/16

Hence the photo takes 3/16 of the magazine

7 0
3 years ago
Other questions:
  • Simplify the expression: 7s2+4s2–5s2–3s2
    12·1 answer
  • Which is an arithmetic sequence?
    7·1 answer
  • Select all of the ratios that are equivalent to 3/13
    15·1 answer
  • If a piece of ribbon is 5 and 1 over 2. Feet long, how long is it in inches? 33 inches 55 inches 60 inches 66 inches
    9·2 answers
  • What is the value of g^-1(9)
    7·2 answers
  • Tony is having a cookout and has to
    6·1 answer
  • Determine a and b so that figure ABCD is a parallelogram
    15·1 answer
  • Bob bought a broken motor scooter, repaired it, and sold the scooter for $130. That was $50 less than 1.5 times what he paid for
    10·1 answer
  • Find the sum of the first 39 terms of the following series, to the nearest integer<br> 7,15,23,...
    10·1 answer
  • 5/6 of a number is 10. What is the number?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!