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
Natalka [10]
3 years ago
7

A new computer can complete a complex biochemistry calculation in 7 hours less than an older-model computer. Working together, t

he new computer and the old computer can complete the calculation in 13 hours. How long would it take the new computer to complete the calculation by itself? Round to the nearest tenth of an hour.
Mathematics
1 answer:
Alchen [17]3 years ago
6 0
The rate a computer works is 1/time. Working together, you add the rates.
Let new computer be x, old computer be y.
x = y - 7

\frac{1}{x} + \frac{1}{y} = \frac{1}{13} \\  \\ \frac{1}{y-7}+\frac{1}{y} = \frac{1}{13} \\  \\ \frac{2y-7}{y(y-7)} = \frac{1}{13} \\  \\ y(y-7) = 13(2y-7) \\  \\ y^2-33y+91 = 0 \\  \\ y = 29.96 \\  \\ x = y-7 = 29.96-7 = 22.96
Rounded to nearest tenth gives:
x = 23 hours
You might be interested in
Nadia make the diagram below to represent the counter space she wants to build in her craft room
kotykmax [81]
The answer is 110 squared
6 0
3 years ago
Need help please on this one
OverLord2011 [107]

Answer:   3/2

==========================================================

Explanation:

Pick any two points on the red line. I'll pick (0,1) and (2,4)

Those coordinates will be plugged into the slope formula below

m = (y2 - y1)/(x2 - x1)

m = (4 - 1)/(2 - 0)

m = 3/2

This means we go up 3 and over to the right 2 when traveling along this red line.

8 0
2 years ago
kalen has a 60 gallon fuel tank. the fuel gauge points to 1/4 how mcuh fuel does she need to buy to fill the tank
murzikaleks [220]

Answer:

45 Gallons

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
5.
Paha777 [63]

Step-by-step explanation:

30 minutes x an hour and half past prolly around 1 hr and 30 sec

5 0
3 years ago
If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen
MArishka [77]

Answer:

all work is shown and pictured

8 0
3 years ago
Other questions:
  • I want answer part b ​
    7·2 answers
  • Solve for x. x2 + x - 6 = 0 A. -2, -3 B. -2, 3 C. 2, -3 D. 2, 3
    12·2 answers
  • Oprah makes $156.00 per day plus an additional 8% commission on her sales. Which equation could be used to find how much Oprah m
    11·1 answer
  • Check all of the infinite geometric series that diverge.
    12·1 answer
  • Tony works 22 hours per week. his take home pay is $15.80 per hour. if tony is able to save all of his earnings, how long will i
    14·2 answers
  • Ivan flips a coin 40 times, How many times can he expect head to appear?
    13·2 answers
  • Convert 2.5 litres to cm3
    12·1 answer
  • What is the solution to the system graphed below? How do you know?
    11·1 answer
  • Solving Equations with the Variable on Each Side
    11·1 answer
  • Find measure of n<br>..............​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!