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
Agata [3.3K]
3 years ago
10

Nathaniel can weld a railing in 75 minutes. Brenda can weld a railing 25 minutes faster. If they work together, how many minutes

does it take them to weld the railing?
Mathematics
1 answer:
geniusboy [140]3 years ago
5 0

Answer:

30 minutes

Step-by-step explanation:

Nathaniel can weld 1 rail in 75 minutes, so he welds 1R = 75 min,  and Brenda can weld 1 rail in 50 minutes (25 minutes faster than Nathaniel), so she welds

1R = 50 min

We want to see how many minutes it takes them both, so we need to solve both problems for the minute unit

Nathaniel:  (1/75)R = 1 min   (he can do one seventy-fifth of a rail per minute)

Brenda:  (1/50)R = 1 min (she can do one fiftieth of a rail per minute)

notice, the equation is 1/(minutes it takes them), and we want to see how long it takes both of them, so we get the equation:

1/75 + 1/50 = 1/x

Simplify the left side with common denominator of 57(50) = 3750

We get

125/3750 = 1/x

We can cross multiply to get rid of the fractions...

125x = 3750

Divide both sides by 125 to solve for x...

x = 30, so it would take them 30 minutes to weld a rail if they work together.

You might be interested in
Graph the function <br>y=3/2x+1​
Fiesta28 [93]
This is the graph for the function

5 0
3 years ago
The cost of in-state tuition at the University of Florida is $6,380 and is increasing at a rate of 3.1% per year. Write and use
olga_2 [115]

Answer:

loser

Step-by-step explanation:

8 0
3 years ago
Peggy wants to make 26
tekilochka [14]
If there are 26 bags EACH costing $9 then you would use equation A. 
26 (The number of gift bags) x the price of each bag would cost close to $234. That would be the reasonable estimate and I hope this helps!
6 0
3 years ago
Please help me with this problem​
eimsori [14]

Find the equation of the first line using the two given points: (1,-1) (-1,-5)

Slope = change in Y over change in x:

Slope = (-5-(-1)) / (-1-(1) = -4/-2 = 2

Now find y intercept: y - y1 = m(x-x1) = y -(-1) = 2(x-1)

Simplify to get y = 2x-3

Now a perpendicular line has a opposite reciprocal slope.

The perpendicular line would be y = -1/2x - 3

You are told the y intercept is -4 units greater, so add -4 to -3 to get -7

The answer would be A. y = -1/2x-7

6 0
4 years ago
Una persona camina 7 kilómetros hacia el norte, después 3 kilómetros hacia el este y, luego, 3 kilómetros hacia el sur. ¿A qué d
qaws [65]

Answer:

La persona está a 5 kilómetros con respecto al punto de partida.

Step-by-step explanation:

Considérese que la dirección norte coincide con el semieje +y y que la dirección este coincide con el semieje +x. A continuación, obtenemos las formas vectoriales equivalentes de cada afirmación:

(i) Una persona camina 7 kilómetros hacia el norte:

\vec r_{1} = 7\,\hat{j}\,[km]

(ii) Después 3 kilómetros hacia el este:

\vec r_{2} = 3\,\hat{i}\,[km]

(iii) Y luego, 3 kilómetros hacia el sur:

\vec r_{3} = -3\,\hat{j}\,[km]

El vector resultante de desplazamiento se construye a partir de la siguiente suma de vectores:

\vec R = \vec r_{1}+\vec r_{2} + \vec r_{3} (1)

\vec R = 3\,\hat{i} + 4\,\hat{j}\,[km]

Asumiendo que la distancia coincide con el desplazamiento resultante, calculamos la distancia con respecto al punto de partida mediante el Teorema de Pitágoras:

\|\vec R\| = \sqrt{3^{2}+4^{2}}

\|\vec R\| = 5\,km

La persona está a 5 kilómetros con respecto al punto de partida.

3 0
3 years ago
Other questions:
  • What percentage of 64 is 288
    6·1 answer
  • The following problem refers to strings in A, B, ..., Z.
    14·1 answer
  • Do the table and the equation represent the same function ? Y=390+11(x)
    9·1 answer
  • -2 (×-5) = 5 (-3×+4) +3 solve please
    11·2 answers
  • Urgent!!! what is this math answer?!?!
    13·2 answers
  • The equation that models this relationship is y=2x. How many liters of water should Austin combine with 16 scoops of juice mix?
    5·1 answer
  • Please help me<br><br><br><br> Excellent help needed
    5·2 answers
  • There are 10 girls in the class. This is three less thank half the number of boys . How many boys are in the class?
    10·2 answers
  • Is this correct if not why !!!!!!!
    9·2 answers
  • 7 2/5 + 3 1/5=?<br> Explain show the work<br> Give me the answer
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!