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
ycow [4]
3 years ago
12

The load that can be supported by a rectangular beam there is jointly as the width of the beam in the square of its height and i

nversely as the length of the beam a been 14 feet long with the width of 4 inches and the height of 6 inches can support a maximum load of 800 pounds if a similar board has a width of 9 inches and the height of 5 inches how long must be to support 1400 pounds
Mathematics
1 answer:
g100num [7]3 years ago
5 0

Answer:

  12.5 feet

Step-by-step explanation:

The description of the load-carrying capacity of the beam translates as ...

  load = k·w·h²/l

Filling in the numbers, we can find the constant k:

  800 lb = k·(4 in)(6 in)²/(14 ft)

  k = (800·14 lb·ft)/(144 in³) = 700/9 lb·ft/in³

__

Then the length to support 1400 lb with the other given dimensions will be ...

  1400 lb = (700/9) lb·ft/in³ × (9 in)(5 in)²/l

  l = 700·25/1400 ft = 12.5 ft

The beam must be at most 12.5 ft long to support 1400 pounds.

You might be interested in
Jacob makes a scale drawing for a crate with a scale factor of 1:20. The dimensions of his scale drawing are 3 inches long by 2
kipiarov [429]

Answer: 6 inches long and 4 inches wide

Step-by-step explanation: The dimensions of the actual crate are 20 times those on Jacob's drawing. The dimensions on the builder's drawing are 1/10 of those, so (1/10)(20) = 2 times the dimensions on Jacob's drawing.

hope this helps

6 0
3 years ago
I am in need of some serious help here, I skipped this last time so I got a bad grade
lesantik [10]
1. ab= 6 x 3 = 18             1) = 18

2. c + 4 = 2 + 4 = 6           2) = 6

3. a/b = 6/3 = 2                 3) = 2

4. a - b - 6 - 3 = 3             4) = 3

5. 2c = 2(2) = 4                5) = 4

6. b/3 = 3/3 = 1                6) = 1

7. a - 1 = 6 - 1 = 5           7) = 5

8. 6 + c= 6 + 2 = 8          8) = 8
8 0
3 years ago
RS = 6y+2, ST=3y +7, and RT=13y-23 What is the value of y? y =________ Find STand RT. ST =_______ RT =_______
svlad2 [7]

Answer:

<h2><em> y = 8, ST = 31 and RT = 81</em></h2>

Step-by-step explanation:

Given RS = 6y+2, ST=3y +7, and RT=13y-23, the vector formula is true for the equations given; RS+ST = RT

Om substuting the expression into the formula;

6y+2+3y +7 = 13y - 23

collect the like terms

6y+3y-13y+2+7+23 = 0

-4y+32 = 0

Subtract 32 from both sides

-4y+32-32 = 0-32

-4y = -32

y = -32/-4

y = 8

Since ST = 3y+7. we will substitute y = 8 into the exprrssion to get ST

ST = 3(8)+7

ST = 24+7

ST = 31

Similarly,

RT = 13y-23

RT = 13(8)-23

RT = 104-23

RT = 81

<em>Hence y = 8, ST = 31 and RT = 81</em>

6 0
3 years ago
Draw a line representing the "rise" and a line representing the "run" of the line, State
Alexxx [7]

Answer:

The slope of the line m = 1

The equation of the straight line x -y -7=0

Step-by-step explanation:

<u><em>Explanation:-</em></u>

In the given graph

The points are ( 7,0) and ( 0, -7)

The slope of the line

            m = \frac{y_{2}- y_{1}  }{x_{2}-x_{1}  } = \frac{-7-0}{0-7} = \frac{-7}{-7} = 1

The equation of the straight line passing through the point (7,0) and slope m=1

    y - y₁ = m (x - x₁)

    y - 0 = 1( x-7)

   y = x -7

   x - y -7=0

<u><em>Final answer:-</em></u>

The slope of the line m = 1

The equation of the straight line x -y -7=0

<u><em></em></u>

4 0
3 years ago
10 ÷ (20 ÷ 2² × 5 ÷ 5) × 8 - 2
dangina [55]
Use PEMDAS:

P arenthesis
E xponents
M ultiplication
D ivision
A dd
S ubstract

Paranthesis and Exponents
(20 / 2^2 * 5 / 5) = 5

Multiplication
5*8= 40

Division
10 / 40 = 0.25

Subtraction
0.25 - 2 = −1.75

Therefore,
The answer is -1.75


5 0
3 years ago
Other questions:
  • Sarah spent a total of $7.25 on 8 apples and a packet of grapes. If a packet of grapes cost $2.85, how much did each apple cost?
    12·1 answer
  • In the expression 12a+5, identify. The coefficient
    15·1 answer
  • Susie’s Sweet Shop sells chocolate boxes that contain three types of chocolate truffles: solid chocolate truffles, cream center
    12·1 answer
  • Which expression are equivalent to (5g+3h+4)•2 ! please help
    11·2 answers
  • in Cranston taxis charge $4 plus $0.90 per mile for an airport pickup how far from the airport can Ralph travel for $17.50​
    15·1 answer
  • What's the error? Jerry says that a cube with edges that measure 10 cm has a volume that is twice as much as a cube with sides t
    9·1 answer
  • Can someone help me please
    9·2 answers
  • Simplify the product using the distributive property. Please show your
    13·2 answers
  • The Fibonacci sequence 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, … is formed by summing two consecutive numbers to get the next number.
    15·1 answer
  • Write an equation of the line passing through the points (4,6) and (-2, - 18).
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!