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
slava [35]
3 years ago
11

a dvd costs twice as much as a music cd. Jack buys 2 dvds and 2 cds and spends $45. Determine how much one cd costs. in dollars

Mathematics
2 answers:
maria [59]3 years ago
4 0
V=2c, and 2v + 2c =45 you can substitute v for 2c in the second equation because they equal to get 4c +2c =45 6c =45 c = 45/6, so the answer is $7.50
VMariaS [17]3 years ago
3 0
dvd=d \\ cd=c \\  \\  \left \{ {{d=2c} \atop {2d+2c=45}} \right.  \\  \\ 2(2c)+2c=45 \\ 4c+2c=45 \\ 6c=45 \\ c=7.5 \\  \\ d=2(7.5) \\ d=15

One CD costs $7.50.
One DVD costs $15.00.
You might be interested in
Answer for: -10 = 10 = 7m. m =<br><br> •0<br> •7 <br> •10<br> •11
wel

Answer:

Ok so your answer should be m = 0

Step-by-step explanation:

the explanation is to Rewrite the equation as  − 10 +7 m = − 10 .− 10 + 7 m = − 10

Move all terms not containing  m

to the right side of the equation.

7 m = 0

 Divide each term by  7

and simplify.

m = 0

i hope this can help

5 0
3 years ago
g A coin where the probability of heads is 0.3 is flipped 2000 times. Use the normal approximation to the binomial distribution
matrenka [14]

Title:

<h2>See the explanation.</h2>

Step-by-step explanation:

The coin is to be flipped 2000 times.

The probability of getting a head is 0.3.

It is given that, we need to get a head in between 575 and 618 times.

If we will get 575 heads then we will get (2000 - 575) tails.

Hence, if we take that we want to get n times head, then we will get (2000 - n) times tail.

The probability of not getting a head is (1 - 0.3) = 0.7.

The probability of getting n times head is ^{2000}C_n (0.3)^n \times (0.7)^{2000 - n}.

The required probability is ∑ ^{2000}C_n (0.3)^n \times (0.7)^{2000 - n}, where 575 \leq n \leq 618.

5 0
3 years ago
which expressions are equivalent to 2? Choose ALL that apply. 6 6 6 6 6 6 2.2.2.2.2.2 2.6 4.16 12 - 12 8.8​
frez [133]

Answer:

2,4,6,8,12,16

Because it is 2 times 3 equals 6

2 times 1 equals 2

2 times 2 equals 4

2 times 8 equals 16

2 times 3 equals 6  

2 times 4 equals 8

2 times 6 equals 12

and they are all a factor of 2

7 0
3 years ago
We are given with height= 9 ft. Length=10 ft. Wall Brackets: 48-inch cost $12.95 68-inch cost $16.95 Distance from brackets from
VikaD [51]

Answer:

$89.7

Step-by-step explanation:

We are given with

height = 9 feet

length = 10 feet

wall brackets:

48-in costing $12.95

60-in costing $16.95

distance of brackets from ends = 1 foot

maximum distance between brackets= 24 inches

The brackets are

48/12 = 4 feet

and

60/12 = 5 feet

One of each must be used to cover the height of the shelf

The length of the shelf is

60 inch

subtracting 1 in from each side for the allowance

60 - 2 = 58 in

Dividing by 24 inches

58/24 = 2.41 ~ 3 

The total cost is

($12.95 + $16.95) * 3 = $89.7

The total cost of the brackets is $89.7

6 0
3 years ago
9282 divided by 433 with a remainder
Studentka2010 [4]

Step-by-step explanation:

the explanation is pictured

7 0
3 years ago
Other questions:
  • Use Lagrange multipliers to find the maximum and minimum values of the function subject to the given constraint. (If an answer d
    9·1 answer
  • The ratio black to blue bags is 5 to3 if there is 10 black bags how many blue bags?
    12·1 answer
  • 6. You have a coin collection of nickels and dimes containing 63 coins. If you have $5.05, how may of each coin
    5·1 answer
  • PLZZZZZZ HELP 10 POINTS!!!!!
    11·2 answers
  • (30 Points! Please explain your answer)
    6·1 answer
  • Find X to the nearest tenth.<br>A) 9.3<br>B) 9.4<br>C) 9.5
    7·2 answers
  • Plz help me which number do i use for the hight
    10·1 answer
  • Please answer both thank ​
    8·1 answer
  • The temperature in Vancouver is -8ºC, in Montreal it is -4ºC , in Seattle it is -6ºC, and in Buffalo it is -10ºC. Which city is
    12·1 answer
  • HELP PLEASE 10 POINTS!!!!!!!!!!!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!