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
Murljashka [212]
3 years ago
11

Fred takes 3 hours to dig a garden. It takes Jason 5 hours to

Mathematics
1 answer:
Irina18 [472]3 years ago
7 0
It takes them 1 7/8 hrs to complete the job together.

How:
Fred = 3 hrs
Jason = 5 hrs

1/3x + 1/5x = 1/x

3x x 5x = 15 —> 3x/15 + 5x/15 = 15/15

3x + 5x = 8x —> 8x/15 = 1.875 = 1 7/8 hrs
You might be interested in
HELP HELP PLEASE ILL MARK BRAINLIEST
Maurinko [17]

Answer:

third one

Step-by-step explanation:

cuz its a fraction, and fractions arent polynomials

3 0
3 years ago
Read 2 more answers
Calculate the number of hours in 7/2 days.
PtichkaEL [24]
7/2 can be = to 3 and 1/2 
1 day is = to 24 hours
3 1/2 times 24 = 84 hours
4 0
3 years ago
Read 2 more answers
What is the additive inverse of (- 2) ?
Evgesh-ka [11]

Answer:

2 because it holds the same value as -2 and its the additive inverse

6 0
3 years ago
Which quadratic function is represented by the table ???
Ulleksa [173]

Answer:

B) f(x) = 3x² - 2x + 5

Step-by-step explanation:

To find the correct quadratic function that represents the table, you must substitute [x] into the quadratic function.

A) f(x) = 3x² + 2x - 5

B) f(x) = 3x² - 2x + 5

C) f(x) = 2x² + 3x - 5

D) f(x) = 2x² - 2x + 5

A.   3(-2)² + 2(-2) - 5 =

3(4) - 4 - 5

12 -  4 - 5

12 - 9

= 3

B.   3(-2)² - 2(-2) + 5 =

3(4) + 4 + 5

12 + 9

= 21

C.   2(-2)² + 3(-2) -5 =

2(4) - 6 - 5

8 - 11

= - 3

D.   2(-2)² + 2(-2) + 5 =

2(4) - 4 + 5

8 - 4 + 5

8 + 1

= 9

Your correct answer is: B

8 0
3 years ago
Tower one, a cube with a hexagonal prism measures 15.6cm. Tower two, a cube with a cylinder measures 18.3cm. Tower 3, a hexagona
lina2011 [118]

Answer:

Tower 4 = 23.9cm

Step-by-step explanation:

Given

Tower one = 15.6 cm

Tower two = 18.3 cm

Tower 3 = 13.9 cm.

Required:

Height of the 4th tower

Represent a cube by X; a cylinder by Y and a hexagonal prism by Z

Tower one, a cube with a hexagonal prism = X + Z = 15.6

Tower two, a cube with a cylinder = X + Y = 18.3

Tower 3, a hexagonal prism with a cylinder = Z + Y = 13.9

X + Z = 15.6 ----- Equation 1

X + Y = 18.3 ----- Equation 2

Z + Y = 13.9 ----- Equation 3

Subtract equation 1 from 2

(X + Y = 18.3) - (X + Z = 15.6)

X - X + Y - Z = 18.3 -15.6

Y - Z = 18.3 -15.6

Y - Z = 2.7 ---- Equation 4

Add Equation 4 to Equation 3

(Y - Z = 2.7) + (Z + Y = 13.9)

Y + Y - Z + Z = 2.7+ 13.9

2Y  = 2.7+ 13.9

2Y  = 16.6

Divide both sides by 2

\frac{2Y}{2}  = \frac{16.6}{2}

Y  = \frac{16.6}{2}

Y  = 8.3cm

Substitute Y  = 8.3cm in Equation 2 and 3

X + Y = 18.3 ----- Equation 2

X + 8.3 = 18.3

Subtract 8.3 from both sides

X + 8.3 - 8.3 = 18.3 - 8.3

X = 18.3 - 8.3

X = 10cm

Z + Y = 13.9 ----- Equation 3

Z + 8.3 = 13.9

Subtract 8.3 from both sides

Z + 8.3 - 8.3 = 13.9 - 8.3

Z = 13.9 - 8.3

Z = 5.6cm

So, we have that

X = 10cm

Y  = 8.3cm

Z = 5.6cm

The question states that the 4th tower is made up of the three shapes;

This implies that;

Tower 4 = X + Y + Z

Tower 4 = 10cm + 8.3cm + 5.6cm

Tower 4 = 23.9cm

The height of the 4th tower is 23.9cm

8 0
3 years ago
Other questions:
  • 1/2 (8x-2) + (-2x + 1/4)
    11·1 answer
  • Help with this??? please
    8·1 answer
  • I can’t figure this out please help me out
    5·2 answers
  • 33 POINTS POSSIBLE PLEASEEEE HELP
    8·1 answer
  • If sales tax is 8%, what is the tax on a sale of $400.00?
    5·1 answer
  • Compound interest . A student get a grant of $10000 a year assuming her grant is increased by 7% each year what will her grant b
    14·1 answer
  • Identify the relation that is also a function.
    8·1 answer
  • HELP ME QUICKLY I WILL GIVE YOU THE CROWN
    6·1 answer
  • From a group of 10 children, a team of 5 (the red team) is randonnly chosen. The remaining 5 children
    7·1 answer
  • Local extreme Value for each of the Following A) F(x)=x^² - 4x² +5​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!