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
DerKrebs [107]
3 years ago
9

Working with your cousin you can refinish a table in 3 hours. Working alone, your cousin can complete the job in 7 hours. How lo

ng would it take you to refinish the tab look alone?
Mathematics
1 answer:
spin [16.1K]3 years ago
8 0
The answer would be 4. if the cousin could do it at 7 hours and now when they work with the cousin it finishes in three that means that the person takes away 4 hours so if they were to work alone that would be 4 hours, hope its right!
You might be interested in
Drag each set of column entries to the correct location in the matrix equation. Not all sets of entries will be used. A biker ne
ANEK [815]

Answer:

The matrix equation is \left[\begin{array}{ccc}1&1&1\\1&-1/2&0\\0&2&-1\end{array}\right]=\left[\begin{array}{c}120&35&20\end{array}\right]

Step-by-step explanation:

* Lets change the story problem to equations

- The distance between the starting point and checkpoint 1 is x

- The distance between checkpoint 1 to checkpoint 2 is y

- The distance between checkpoint and the finish line is z

- The total distance for the race is 120 miles

∴ x + y + z = 120 ⇒ (1)

-The distance from the starting point to checkpoint 1 is 35 miles

 more than half the distance from checkpoint 1 to checkpoint 2

∵ The distance from the starting point to checkpoint 1 is x

∵ The distance from checkpoint 1 to checkpoint 2 is y

- x is more than half y by 35

∴ x = 35 + (1/2) y ⇒ subtract (1/2) y from both sides

∴ x - (1/2) y = 35 ⇒ (2)

- The distance from checkpoint 2 to the finish line is 20 miles less

 than twice the distance from checkpoint 1 to checkpoint 2

∵ The distance from checkpoint 2 to the finish line is z

∵ the distance from checkpoint 1 to checkpoint 2 is y

- z is less than twice y by 20

∴ z = 2y - 20 ⇒ add 20 to both sides

∴ z + 20 = 2y ⇒ subtract z from both sides

∴ 2y - z = 20 ⇒ (3)

* Now lets write the three equations

# x + y + z = 120 ⇒ (1)

# x - (1/2) y = 35 ⇒ (2)

# 2y - z = 20 ⇒ (3)

- Now lets write the matrix equation that models this situation

∴ \left[\begin{array}{ccc}1&1&1\\1&-1/2&0\\0&2&-1\end{array}\right]=\left[\begin{array}{c}120&35&20\end{array}\right]

6 0
3 years ago
Read 2 more answers
12. What is the perimeter of a football field measuring 360 feet by 160 feet?
lakkis [162]
A football field is rectangle so each matching side has the same length. Perimeter = adding all sides

7 0
3 years ago
Read 2 more answers
What is this for q 9 plsss helpppp
Allisa [31]

Answer:

9 square units

Step-by-step explanation:

3 0
2 years ago
1. What was the second of two crucial events that increased U.S. concerns about the spread of
sineoko [7]
1. the answer is D 
2. You are correct it is vietnam
3. the answer is 1947
4 0
3 years ago
Read 2 more answers
Ms. Carlson has $7,145.Ms.lee has $3.799
ElenaW [278]
Okay well Ms. Carlson has more money than Ms. Lee, about $7,142.2 more than her. PART A ANSWER: Ms. Carlson. Together they have $7,148.799. to estimate it to the closest tens it would be $7,150. PART B ANSWER:$7,150
4 0
3 years ago
Other questions:
  • I need this ASAP. Directions: If possible then use the Law of Detachment to draw a conclusion. If not possible write not possibl
    15·2 answers
  • What is the degree of the monomial 5x^12
    10·2 answers
  • Chris cut a rope into two pieces. One piece was 11.36 meters long and the other piece was 13.46 meters long. About how long was
    14·2 answers
  • A family visits a car show to research information on vehicles they might consider purchasing. Brochures for each vehicle provid
    6·1 answer
  • A hypothesis will be used to test that a population mean equals 5 against the alternative that the population mean is less than
    6·1 answer
  • Coras kitten weighs 1200 grams if he weighed 550 grams at the visit to the veteranarians office, what is thepecent increase in t
    12·1 answer
  • What is the exact form of tan 105 degrees
    13·2 answers
  • PLEASE HELP 10 BRAINLY POINTS<br> Find SA for this triangular prism: DON'T FORGET TO SHOW ALL WORK
    14·1 answer
  • why is sin(90 degrees) = 1. I know that that is the answer you get when you plug it into a calculator. I need an explanation as
    13·1 answer
  • Claire rides her bicycle five miles each day for four days and two miles each day for the remaining three days of the week.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!