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icang [17]
3 years ago
14

Write the quadratic equation in standard form and then choose the value of "b." (2x - 1)(x + 6) = 0 -4 11 12

Mathematics
1 answer:
frozen [14]3 years ago
7 0

Answer:

2x^2 + 11x - 6

b = 11

Step-by-step explanation:

To write the equation in standard form, use the distributive property to multiply. Then combine like terms.

(2x - 1)(x + 6)

2x^2 - x + 12x - 6

2x^2 + 11x - 6

Now written in the standard form of a quadratic ax^2 + bx + c, the value of b here is 11.

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masha68 [24]

Answer:

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Step-by-step explanation:

4 0
3 years ago
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There are 20 parrots at the animal sanctuary. Their population is increasing at a rate of 15% per year. There are also 24 snakes
worty [1.4K]
For the answer to the questions above,
A) Parrots are following a Geometric Progression of 15% increase.

20(1.15),  20(1.15)², 20(1.15)³,

Function  = 20(1.15)^n      Where n is at the end of year, n =1, 2, 3, ..

Snakes are increasing by 4.

28, 32, 36,....

Function =  24 + 4n          n = number of end year,      n =1, 2, 3,...

<span>B) After 10 years:              </span>
Parrot =  20(1.15)¹⁰    = 80.91115471

Snakes =  24 + 4(10) = 64

<span>C) After what time they are the same: </span>
We use trial and error:


Test:  n                             20(1.15^n)                        (24 + 4n)
          1                                    23                                   28
          2                                    26.45                              32
<span>          3                                    30.41                             36    </span>
          4                                    34.98                              40
          5                                    40.23                              44
          6                                    46.26                              48
          7                                    53.20                              52
          8                                    61.18                              56
          9                                    70.36                              60

After year 7, the Parrots increases far more.
<span>At year 7 they are roughly the same.</span>
8 0
4 years ago
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nydimaria [60]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
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lapo4ka [179]

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Step-by-step explanation:

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Change 1 7/8 to an improper fraction

substitute this value into the equation

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Multiplying by the inverse results in a product of 1 so the result is

dividing by 1 gives just the top fraction.

Dividing out common factors leaves

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Answer:

Step-by-step explanation:

The formula for the volume of a cylinder is V = πr²h.  

Here, r = 5cm, and h = 15 cm, and so the volume is:

V = πr²h = π(5 cm)²(15 cm), or:

V = π(25 cm²)(15 cm) = 375π cm³, or approximately 1170 cm³

6 0
4 years ago
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