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
Marizza181 [45]
3 years ago
13

Rufus appears before Bill and Ted and offers them a bogus proposition: they must paint a house together with their magical guita

rs in a mere 5 hours. Ted, who is tired, knows that the fastest he can solo rock the paint job through the strings of his guitar is 19 hours. How hard does Bill have to jam to ensure the house is completed in time? Give your answer as the number of hours Bill must play; write your answer as a decimal rounded to two places, without any units.
Mathematics
1 answer:
jolli1 [7]3 years ago
6 0

Answer:

6.79

Step-by-step explanation:

-Let X denote the total amount of the job.

-The job has to be done in 5 hrs, therefore the portion done every hour is:

Rate=\frac{Total}{Time}\\\\=\frac{X}{5}\\\\=\frac{1}{5}X=0.2X

Therefore, the rate of Bill and Ted working jointly must equal the rate calculated above:

R_{Bill}=\frac{X}{19}\\\\=\frac{1}{19}X\\\\R_{Bill}+R_{Ted}=R_{required}\\\\\frac{1}{19}X+R_{Ted}=\frac{1}{5}X\\\\R_{Ted}=\frac{1}{5}X-\frac{1}{19}X\\\\=\frac{14}{95}X\\\\\therefore \frac{14}{95}X=1\ hr\\\\X=1\div \frac{14}{95}\\\\=6.7857\approx 6.79hrs

Hence, Bill working alone should complete the house in 6.79 hrs

You might be interested in
Picture question middle school math <br> I will give brain list
Lilit [14]

Answer:

C. 90ft²

Step-by-step explanation:

To find the area of a trapezoid, use the formula a = (b1 + b2)h ÷2

So when you put the numbers into the formula, you get (12 + 18) · 6 = 180 ÷ 2 = 90

7 0
2 years ago
What is the correlation coefficient with the following data points: (1,6), (3,2), (7,5), (6,2)?
Greeley [361]

Answer:

Option D → -0.28

Step-by-step explanation:

4 0
2 years ago
All graphs need to have a key, the data (imformation) and a _____?
jarptica [38.1K]

Answer:

B

Step-by-step explanation:

6 0
3 years ago
Do this please please?!?!​
Shalnov [3]

Answer:

1. 6

2. 27

3. 158

4. 9

5. 380

6. 108

7. 48

8. 10

9. 115

10. 57

Step-by-step explanation:

3 0
2 years ago
Mr peterson will buy 80 feet of fencing. The pieces of fence come in whole numbers of feet. His enclosure will be a rectangle an
DIA [1.3K]
The perimeter is:
 P = 2x + 2y = 80
 The area is:
 A = x * y
 The area as a function of a variable is:
 A (x) = x * (40-x)
 Rewriting we have:
 A (x) = 40x-x ^ 2
 We derive the function:
 A '(x) = 40-2x
 We equal zero and clear x:
 40-2x = 0
 2x = 40
 x = 40/2
 x = 20 feet
 The other dimension is:
 y = 40 - x
 y = 40 - 20
 y = 20 feet
 The area will be:
 A = x * y
 A = 20 * 20
 A = 400 feet ^ 2
 Answer:
 
The dimensions are:
 
x = 20 feet
 
y = 20 feet
 
The area is:
 
A = 400 feet ^ 2
5 0
3 years ago
Other questions:
  • What is the length of chord in A below?
    10·1 answer
  • Grammy's Apple Orchard is selling apple cider in 34.7-ounce bottles for $2.09. Grammy's competitor is selling 24.6-ounce bottles
    11·1 answer
  • Help plz! Use the slope formula to find the missing coordinate. m = 2, A(_, 0), B(5, 10)
    12·1 answer
  • Global Gas International offers to contract the Halidurton Heavy Construction Corporation to build an oil pipeline from Canada t
    11·1 answer
  • Help please<br> dghsshjhjs
    7·1 answer
  • Explain why the greater than or equal to and less than or equal to symbols have a closed circle, while the greater than and less
    6·1 answer
  • Help please I need these answers
    11·1 answer
  • Explain what happens as the heart grows bigger.
    15·2 answers
  • Someone please help with all this. Show working out as well! Will mark as brainliest.<br> Thanks
    12·1 answer
  • Which expression is equivalent to 6^-4 ÷ 6^-2?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!