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Kipish [7]
4 years ago
5

What two numbers add to 2 and multiply to -80

Mathematics
1 answer:
kap26 [50]4 years ago
7 0
The answer is -8 and 10.

When a positive and negative are multiplied together, the result is always negative: -8 times 10 = -80.

When you add a positive and negative number together, it's really subtracting the negative from the positive: 10 - 8 = 2. 
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At a certain vineyard it is found that each grape vine produces about 10 lb of grapes in a season when about 700 vines are plant
Delicious77 [7]

Answer:

Number of vines that should be planted are 150.

Step-by-step explanation:

The number of pounds of pounds of grapes produced per acre is represented by the expression A_{n}=(700+n)(10-0.01n)

Where n = additional vines planted

To maximize the production of grapes we will find the derivative of A(n) and equate it to zero.

A_{n}=(7000+3n-0.01n^{2} )

A'_{n}=(3-0.02n)

For A'_{n}=0

3 - 0.02n = 0

0.02n = 3

n = \frac{3}{0.02}

n = 150

To check whether the maximum value of the function is at n = 150, we will find the second derivative A(n).

A''_{n}=-0.02

Which shows A"(n) < 0

Therefore, A(n) has the maximum value at n = 150.

Therefore, number of vines that should be planted are 150.

5 0
4 years ago
What is the approximate value of x in this figure?<br> 19 POINTS
Sladkaya [172]

Answer:

4.69 inches (2 decimal places)

Step-by-step explanation:

Refer to image attached to this answer:

Using Pythagoras Theorem:

AB^2+AC^2=BC^2

2^2+3^2=BC^2

4+9=BC^2

BC^2=13

-------------------------

Using Pythagoras Theorem,

BC^2+CD^2=BD^2\ (x)

13+3^2=BD^2

13+9=BD^2

BD=\sqrt{22} = 4.69\ (2d.p.)

7 0
3 years ago
Read 2 more answers
How do you factorise 14x -21xy
alexandr402 [8]
<span>Simplifying 14x + -21xy
 
Factor out the Greatest Common Factor (GCF), '7x'. 7x(2 + -3y)

Final result:
7x(2 + -3y)
 
that is the answer on how to do it</span>
4 0
3 years ago
Read 2 more answers
Simplify by combining like terms.
meriva
85/12b +1 is the answer
5 0
3 years ago
Determina la probabilidad que tiene de ganar, una persona que apuesta a los números 13, 14, 17, 35, 39, 54
zimovet [89]

Respuesta:

1/6

Explicación paso a paso:

La probabilidad es la probabilidad o probabilidad de que ocurra un evento. Se expresa como;

Probabilidad = Resultado esperado / Resultado total

Dado que la puntuación total de la muestra es 6 (13, 14, 17, 35, 39, 54)

Resultado total = 6

Dado que vamos a encontrar la probabilidad de ganar,

Puntuación ganadora = 54 (solo un resultado)

Resultado esperado = 1

Sustituir

Probabilidad de ganar = 1/6

5 0
3 years ago
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