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
timofeeve [1]
3 years ago
7

A Web music store offers two versions of a popular song. The size of the standard version is 2.9 megabytes (MB). The size of the

high-quality version is 4.4
MB. Yesterday, there were 1070 downloads of the song, for a total download size of 4393 MB. How many downloads of the standard version were there?
Mathematics
1 answer:
GrogVix [38]3 years ago
3 0

s +h = 1070 ( total number of downloads)

Rewrite as s =1070 - h

2.9s + 4.4h = 4393 ( total download size)

Substitute:

2.9(1070-h) + 4.4h = 4393

Simplify:

3103 - 2.9h + 4.4h = 4393

Combine like terms:

3103 + 1.5h = 4393

Subtract 3103 from each side:

1.5h = 1290

Divide both sides by 1.5:

h = 1290 / 1.5

h = 860

Replace h with 860 in first equation to solve for s:

s + 860 = 1070

s = 1070 - 860

s = 210

There were 210 standard downloads and 860 high quality downloads

You might be interested in
Which inequality can be used to determine the amount of money the family still needs to save?
Tju [1.3M]

Answer:

The inequality equation is

(2,764 + x) ≥ 5,000

Solving further, we obtain

x ≥ 2,236

where x is the amount of money the Li's family still need to save.

Step-by-step explanation:

Li’s family is saving money for their summer vacation. Their vacation savings account currently has a balance of $2,764. The family would like to have at least $5,000.

Which inequality can be used to determine the amount of money the family still needs to save?

Solution

Let x represent the amount of money the Li's family still need to save.

It is given that the family already have $2,764 in their savings account and the family needs at least $5,000.

The total amount the family will have in total, after saving x dollars to join the already saved $2,764 will now be

$(2,764 + x)

This amount must be at least $5,000, that is, this amount must be greater than or equal to $5,000.

So, the inequality equation is then

(2,764 + x) ≥ 5,000

Solving further by subtracting 2,764 from both sides, we obtain

x ≥ 2,236

Hope this Helps!!!

7 0
3 years ago
I need help:/ with those two
White raven [17]
12 is B. You because the graphs slope is 1. 13 is A 7 I think.
3 0
3 years ago
0. A cylindrical tin has a radius of 3 cm. What is the shortest length of a string that can be wound once round the curved surfa
madreJ [45]

Answer: 18.84cm

Step-by-step explanation: 3 x 2 x 3.14 = 18.84cm

4 0
2 years ago
For one full week, Cheng spent $12.50 per day on lunch. Write a multiplication expression using integers to show the overall imp
grin007 [14]
Answer is :a x 12.50= 87.5
3 0
3 years ago
A train leaves San Diego at 1:00 pm. A second train leaves the same city in the same direction at 3:00 pm. The second train trav
Soloha48 [4]

Answer:

The speed of the first train is 45 mph and the speed of the second train is 75 mph

Step-by-step explanation:

Let x represent the speed of the first train in mph. Since the second train, is 30 mph faster then the first, therefore the speed of the second train is (x + 30).

The first train leaves at 1:00 pm, therefore at 6:00 pm, the time taken is 5 hours. Therefore the distance covered by the first train at 6:00 pm = x mph * 5 hours = 5x miles

The second train leaves at 3:00 pm, therefore at 6:00 pm, the time taken is 3 hours. Therefore the distance covered by the second train at 6:00 pm = (x + 30) mph * 3 hours = (3x + 90) miles

Since the second train overtakes the first at 6:00 pm, hence:

3x + 90 = 5x

2x = 90

x = 45

Therefore the speed of the first train is 45 mph and the speed of the second train is 75 mph (45 mph + 30 mph).

7 0
3 years ago
Other questions:
  • Find the sum of the infinite geometric series calculator
    5·1 answer
  • 5 plz help me out I really need help
    5·2 answers
  • Convert 0.001 to a power of ten
    5·1 answer
  • Solve each quadratic equation by the square root method.<br> X^2+2x-3=0
    7·1 answer
  • Value Mart is advertising a back to school sale on pencils a pack of 30 sells for$7.97 where a 12pack of the same brand costs $4
    15·1 answer
  • 4000 principal earning 6% compounded annually afteer 5yr
    15·1 answer
  • FIn the solutions for x:<br> (√x+1) + (√4x+13) = (√3x+12)
    5·1 answer
  • 10. Paul can run 2 miles in 30 minutes. At this rate, how many miles can he run<br> in 150 minutes?
    13·1 answer
  • I need help writing these in numerical form someone help please.
    7·1 answer
  • Heyyyyyyyyyyyyyyyyyyyyyyyyyyyy
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!