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Anettt [7]
3 years ago
14

It took Jaytree 42 seconds to rip about half a DVD. About what is Jaytree’s “ripping rate” in DVDs per minute?

Mathematics
1 answer:
Shtirlitz [24]3 years ago
3 0
You can solve this problem by using the following rule of three:
 42 s ----> 0.5 DVD
 x ----> 1 DVD
 Clearing x:
 x = (1 / 0.5) * (42)
 x = 84 s (time to complete a DVD)
 Then, we have the following conversion:
 1min = 60s
 So:
 x = (84/60)
 x = 1.4 min
 The rate is then:
 rate = 1 / 1.4 = 0.71 DVD / minute
 Answer:
 Jaytree's "ripping rate" in DVDs per minute is
 0.71 DVD / minute
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Confusing stuff! Giving out 50 big points!
UkoKoshka [18]
If the gum costs 75 cents today, which is 3 cents less than three times what the pack cost 20 years ago, we just need to arrange what we know into an equation.
We know that the price of gum today is 75 cents, so we can leave that on one side of the equation as a constant. Also, since we are dealing only with cents and not dollars, there is no need to shift the decimal point to the left.

? = 75

Now, we can work the equation.

The problem tells us that 75 is 3 cents less than three times the old cost. So, if x is the old cost, we can work out the equation based on that.
It says that it's 3 cents less than 3 times x. The question is basically the equation in word form.

3x - 3 = 75

'3x' being the "three times the old cost" part, '- 3' being the "3 cents less" part, and '75' of course being the current price of a pack of gum.
Option C is your correct answer.

BTW if we were to solve this, we would see that the old price of a pack of gum is:

3x - 3 = 75
   + 3      + 3

3x = 78
/3      /3

x = 26

20 years ago, a 75-cent pack of gum cost 26 cents.
Hope that helped! =)
7 0
3 years ago
Read 2 more answers
Which term does not belong with the other three? AB plane CDE FG HI ​
tatuchka [14]

Answer: your answer should be HI i hope it helps

5 0
3 years ago
Solve the system of equations and choose the correct ordered pair. 
chubhunter [2.5K]
Multiply first equation by 8, 
24x + 40y = 352
Multiply second equation by 3, 
24x - 21y = -75

Now, subtract second from 1st, 
61y = 427
y = 427/61
y = 7

Substitute it in very first equation, 
3x + 5(7) = 44
3x = 44 - 35
x = 9 / 3
x =3

In short, Your Answer would be Option D) (3, 7)

Hope this helps!
7 0
3 years ago
Write an equivalent expression to 3 2/3 times 8 3 ^4​
Alexxandr [17]

Answer:

hope this helps

Step-by-step explanation:

Step 1: Enter an algebraic expression in the input field Step 2: Now click the button “Submit” to get the equivalent expression Step 3: Finally, the equivalent expression for the given algebraic expression will be displayed in a new window. What is an Algebraic Expression? An algebraic expression is an expression which consists of variables, coefficients, constants, and mathematical operators such as addition, subtraction, multiplication, and division.

5 0
3 years ago
A truck can be rented from Company A for $90 a day plus a $0.20 per mile .Company B charges $20 a day plus $0.70 per mile to ren
Alex787 [66]

The number of miles in a day at which the rental costs for Company A and Company B are the same is 140 miles

<h3>Rental cost</h3>

Let

  • Number of miles = x

Company A:

90 + 0.20x

Company B:

20 + 0.70x

  • Equate both rental cost

90 + 0.20x = 20 + 0.70x

90 - 20 = 0.70x - 0.20x

70 = 0.50x

  • Divide both sides by 0.50

x = 70/0.50

x = 140 miles

Therefore, the number of miles in a day at which the rental costs for Company A and Company B are the same is 140 miles

Learn more about rental cost:

brainly.com/question/11959610

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8 0
1 year ago
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