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
Georgia [21]
2 years ago
5

Borox is loading a freight elevator with 12 boxes: 4 small, 5 medium, and 3 large. A small box and medium box together weigh 20

pounds; a medium box and a large box together weigh 28 pounds, and a large box with a small box weighs 24 pounds. What is the total weight of the 12 boxes?
Mathematics
1 answer:
grigory [225]2 years ago
6 0

Answer:

140 pounds

Step-by-step explanation:

let s == small box

m = medium box

= large box

the following 3 equations can be derived from the question

s + m = 20 equation 1

m + l = 28  equation 2

l + s = 24  equation 3

make m the subject of the formula in equation 1 and 2

m = 20 - s  equation 4

m = 28 - l  equation 5

equate equation 4 and 5

20 - s = 28 - l

l - s = 8  equation 6

solve equation 3 and 6 using simultaneous equation

l + s = 24  equation 3

l - s = 8  equation 6

subtract equation 6 from 3

2s = 16

s = 8

substitute for s in equation 1

8 + m = 20

m = 12

substitute for m in equation 2

12 + l = 28

l = 16

total weight = (4 x 8) + (5 x 12) + (16 x 3) = 140 pounds

You might be interested in
Which expression is equivalent to
andrezito [222]

Answer:

work it step by step on paper it really helps

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the solution of (8x-8)3/2=64
jasenka [17]
Well x=19/3
Decimal form is 0.6333333....
8 0
3 years ago
Read 2 more answers
CoNfUsIoN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
lys-0071 [83]

Answer:

it has infinitely many solutions because it can be solved by many technics

Step-by-step explanation:

hope my answer helps mark me brianliest plz

6 0
3 years ago
PLZ HELP
Lelechka [254]

Answer:

5 quartz would make the most sense, hope this helps

Step-by-step explanation:

7 0
2 years ago
Solve the equation 4m = 28 for m.<br><br> A. 3<br> B. 4<br> C. 5<br> D. 7
Paha777 [63]
D 28/4=7 that is the answer for the question
3 0
3 years ago
Read 2 more answers
Other questions:
  • A cell phone is 9 centimeters long. If the area of the cell phone is 45 square centimeters, what is the width of the cell phone?
    5·2 answers
  • After the outbreak of a mysterious disease, the average wait time at a hospital increased by 70\%70%. Before the outbreak, the a
    10·2 answers
  • Help please! have a good day :))
    14·2 answers
  • (x +95)<br>(4x - 10)<br><br>Part A<br>What is the value of x?​
    11·1 answer
  • Point A(4,2) is translated according to the rule (x,y)-&gt; (x+1, y-5) and then reflected across the Y-axis.
    13·2 answers
  • 1.What is the length of the altitude of an equilateral triangle with side lengths of 34 inches?
    9·1 answer
  • Which mathematical property is shown here
    5·1 answer
  • A square has an area of 27.8 cm2.
    15·1 answer
  • A music school offers its students 8 different classes each semester. 4 of the classes are in music theory, 3 of the classes are
    7·1 answer
  • How to solve and answer for 4 1/3 - 2 1/5 ?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!