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Naddika [18.5K]
2 years ago
13

a steel beam can cut two different lengths for a project. assuming the weight of a steel beam is proportional to its length, wha

t information would you need to know to write an equation that represents this relationship?

Mathematics
2 answers:
Firdavs [7]2 years ago
8 0

Answer:

None.

Step-by-step explanation:

You can write a statement of proportionality without any additional information:

... weight = k × length . . . . . . . . for some constant k

If you need to know the specific weight of a specific length, then you need to know the constant of proportionality (the value of k).

xz_007 [3.2K]2 years ago
5 0

Answer:

The value of "k" (the constant of proportionality)

Step-by-step explanation:

First of all, we can define the parameters as:

Length of the steel beam = “L”

Weight of the steel beam = “W”

And we need a constant of proportionality, we define as “K”

Next step, with these parameters, we write the equation that represents the relationship:

W = K * L

So the information you would need is the value of “K”.

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Factor the polynomial expression 15x^2 - 2x - 8
AVprozaik [17]

Answer:

(3 x + 2) (5 x - 4)

Step-by-step explanation:

Factor the following:

15 x^2 - 2 x - 8

Factor the quadratic 15 x^2 - 2 x - 8. The coefficient of x^2 is 15 and the constant term is -8. The product of 15 and -8 is -120. The factors of -120 which sum to -2 are 10 and -12. So 15 x^2 - 2 x - 8 = 15 x^2 - 12 x + 10 x - 8 = 5 x (3 x + 2) - 4 (3 x + 2):

5 x (3 x + 2) - 4 (3 x + 2)

Factor 3 x + 2 from 5 x (3 x + 2) - 4 (3 x + 2):

Answer: (3 x + 2) (5 x - 4)

4 0
2 years ago
The value of good wine increases with age. Thus, if you are a wine dealer, you have the problem of deciding whether to sell your
Katyanochek1 [597]

Answer: 64 years

Step-by-step explanation:

Let assume the dealer sold the bottle now for $P, then invested that money at 5% interest. The return would be:

R1 = P(1.05)^t,

This means that after t years, the dealer would have the total amount of:

$P×1.05^t.

If the dealer prefer to wait for t years from now to sell the bottle of wine, then he will get the return of:

R2 = $P(1 + 20).

The value of t which will make both returns equal, will be;

R1 = R2.

P×1.05^t = P(1+20)

P will cancel out

1.05^t = 21

Log both sides

Log1.05^t = Log21

tLog1.05 = Log21

t = Log21/Log1.05

t = 64 years

The best time to sell the wine is therefore 64years from now.

7 0
2 years ago
A bicycle is traveling at 20 feet per minute. What is the bicycle's speed expressed in inches per second?
Vikentia [17]

Answer:

4 inches per second

Step-by-step explanation:

Speed = distance/time

Given

Distance = 20 feet

12 inches = 1 foot

X inches = 20 feet

X = 20 x 12 = 240 inches

Time = 1 minute = 60 secs

Therefore

Speed = 240/60

= 4 inches per second

7 0
2 years ago
anna can buy 3 sweatshirts for a total of $45.how much would it cost if she were to buy 5 sweatshirts at same price?
Feliz [49]

Answer: Anna could buy 5 sweatshirts for $75.

Step-by-step explanation:

lets figure out the price of one sweatshirt.

45/3 = 15

one sweatshirt is $15

5*15=75

so 5 sweatshirts cost $75

6 0
1 year ago
3 litters were born at broadway kennel last year and each litter had 7 puppies how many puppies were born at broadway kennel las
frez [133]
3*7=21
21 puppies were born last year.
6 0
2 years ago
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