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
jekas [21]
3 years ago
8

The total weight of 15 boxes is 45 pounds .how much would 40 boxes weigh

Mathematics
2 answers:
Lera25 [3.4K]3 years ago
5 0
40 boxes would weigh would weigh 120 pounds
sergeinik [125]3 years ago
3 0
To answer this, we must first assume that each box weighs the same.  If this is true, you would make a rate of how many pounds in 15 boxes: 45 lbs/15 boxes.  From here determine the weight per box by dividing 45 by 15.  This means each box is 3 pounds.  Multiply this by the total number of boxes (3 x 40).  This gives you a total weight of 120 pounds for 40 boxes.
You might be interested in
Solve the system of equations.
Ksenya-84 [330]

Answer:

1) {y,x}={-3,-23}

2) {x,y}={7,-9/2}

Step-by-step explanation:

Required:

  • Solve systems of equations

1) y - x = 20, 2x - 15y = -1

Equations Simplified or Rearranged :

[1]    y - x = 20

  [2]    -15y + 2x = -1

Graphic Representation of the Equations :

x + y = 20        2x - 15y = -1  

Solve by Substitution :

// Solve equation [1] for the variable  y

 [1]    y = x + 20

// Plug this in for variable  y  in equation [2]

  [2]    -15•(x +20) + 2x = -1

  [2]     - 13x = 299

// Solve equation [2] for the variable  x

[2]    13x = - 299

  [2]    x = - 23

// By now we know this much :

  y = x+20

   x = -23

// Use the  x  value to solve for  y

   y = (-23)+20 = -3

Solution :

{y,x} = {-3,-23}

2) 25-x=-4y,3x-2y=30

Equations Simplified or Rearranged :

  [1]    -x + 4y = -25

  [2]    3x - 2y = 30

Graphic Representation of the Equations :

   4y - x = -25        -2y + 3x = 30  

Solve by Substitution :

// Solve equation [1] for the variable  x

  [1]    x = 4y + 25

// Plug this in for variable  x  in equation [2]

 [2]    3•(4y+25) - 2y = 30

  [2]    10y = -45

// Solve equation [2] for the variable  y

  [2]    10y = - 45

  [2]    y = - 9/2

// By now we know this much :

  x = 4y+25

   y = -9/2

// Use the  y  value to solve for  x

  x = 4(-9/2)+25 = 7

Solution :

{x,y} = {7,-9/2}

3 0
2 years ago
Find the product.<br>3(m+ n)<br>3m+n<br>3m + 3n<br>3mn​
Fynjy0 [20]
You have to expand the expression so that it becomes
3m+3n
7 0
3 years ago
What is true about the figure? In the figure, angles C and D are a Therefore angle C must measure ​
Nuetrik [128]

Answer

In the figure, angles C and D are a  

✔ linear pair

Therefore, angle C must measure  

✔ 56°

Step-by-step explanation:

3 0
3 years ago
Ruby is visiting a wildlife center to gather information for her term paper. The center has a circular pond with a diameter of 2
kicyunya [14]
C, since the radius is 10 multiply by 2 and 100 x 3.14 is 314

5 0
3 years ago
Read 2 more answers
Number 7 ;( I wish I was good at math
Setler79 [48]
It’s ok I will try to figure out an answer
8 0
3 years ago
Other questions:
  • Help please 10 points
    14·1 answer
  • Which shape is a Parallelogram?
    6·1 answer
  • Similarities and differences between sine and cosine graphs — Algebra 2
    14·1 answer
  • Which equation describes the line with slope of 2 and
    10·1 answer
  • What is 12/32 simplified?
    15·2 answers
  • If the flour to sugar ratio is 5 liters flour to 1 liter sugar, then how much sugar is needed if only 2 liters of flour are used
    5·2 answers
  • Four boys mixed blue paint and yellow paint to make green paint. The table shows the amounts of blue and yellow paint each boy m
    15·1 answer
  • -2x+5y=20 solve for y​
    6·1 answer
  • Determine which value is the greatest, explain why, please and thank you!
    10·2 answers
  • HELPPPP FIND THE AREA
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!