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AlexFokin [52]
3 years ago
6

En un huerto se siembra frijol. Si se pone una planta, produce 3kg de frijol. por cada planta extra que se ponga, todas las plan

tas producen 70g menos. Encuentra una fórmula que exprese la producción según las plantas que hay, y simplifícala de la forma ax 2 +bx+c
Mathematics
1 answer:
Ad libitum [116K]3 years ago
7 0

Answer:

y = -0.07x2 + 3.07x

Step-by-step explanation:

For each plant we add, there is a decrease of 70 grams for all plants from the inicial value of 3 kg of beans.

So, for 2 plants, we have (3 - 0.07) * 2

For 3 plants, we have (3 - 2*0.07) * 3

For x plants, we have (3 - (x-1)*0.07) * x

So we can model the final result of the amount of beans 'y' with the equation:

y = (3 - (x-1)*0.07) * x

y = (3 - 0.07x + 0.07) * x

y = (3.07 - 0.07x) * x

y = -0.07x2 + 3.07x

(In this equation we have a = -0.07, b = 3.07 and c = 0)

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A first number plus twice a second number is 10. Twice the first number plus the second totals 26. Find the numbers.
kompoz [17]

Answer:

<h2>42 and -16</h2>

Step-by-step explanation:

m,\ n-the\ numbers\\\\\text{The equations:}\\\\(1)\qquad n+2m=10\\(2)\qquad n+m=26\\\\\text{subtract both sides of the equations}\\\\(n+2m)-(n+m)=10-26\\\\n+2m-n-m=-16\qquad\text{combine like terms}\\\\(n-n)+(2m-m)+-16\\\\\boxed{m=-16}\\\\\text{Put the value of m to (2)}:\\\\n+(-16)=26\\\\n-16=26\qquad\text{add 16 to both sides}\\\\\boxed{n=42}

5 0
4 years ago
A spinner game has a wheel with the numbers zero through 40 marked in equally spaced slots. Consider a $1 bet on a number from 1
Svetradugi [14.3K]

Answer:

Expected return for this bet = - $0.0243

Step-by-step explanation:

to find out

the expected return for this bet

solution

we know that Number of slots in the spinner  is

Number of slots in the spinner = 0 + 40 = 41 slots

so

P for you winning is here  =  \frac{1}{41}

and

Winning amount is = $40

so we can say that

Expected return for this bet is  = Winning amount × P (winning) - Cost of bet  ...............................1

put here value we get

Expected return for this bet = $40  ×  \frac{1}{41} - 1

Expected return for this bet = - $0.0243

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The random variable X is exponentially distributed, where X represents the time it takes for a person to choose a birthday gift.
kobusy [5.1K]
Sorry I don’t know I’m bad at math lol
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3 years ago
Karla is ordering a pizza. The cost of the pizza is $8.99, plus she must pay $1.50 for each additional topping. Write an equatio
icang [17]

Answer:

8.99+1.50t

Step-by-step explanation:

hope this helps

3 0
3 years ago
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Please help me with this! Also, if you can, what are prime numbers? I need to understand! 0-0
umka2103 [35]

Answer:

9

Step-by-step explanation:

So a prime number is any number that can only be divided by 1 and itself. 7, 3, and 13 are all prime numbers.

Hope i could help you

5 0
3 years ago
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