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1 year ago

Find the solution set. 7x^2-5x-2=0

Mathematics

1 answer:

GenaCL600 [577]1 year ago

7 0

Answer:

−

√

−

, we get that

−

0.6

Explanation:

Rearrange the equation so that it becomes:

−

The quadratic formula is:

−

√

−

In our equation above,

−

Plugging these values into the quadratic equation gives:

−

√

−

(

)

(

−

)

(

)

−

√

120

−

√

169

−

0.6

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2 years ago

The number of views on an interesting video after it's uploaded is represented by the following table:

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Answer:

The model for V(t) ,the number of views, t ,months after it's uploaded, best fits the data is $,V(t)=50(6.25)^t$

Step-by-step explanation:

Time (months) Views

0 50

2 313

4 1950

6 12,210

8 76,300

10 476,800

$(x_1,y_1)=(0,50)\\(x_2,y_2)=(2,313)\\(x_3,y_3)=(4,1950)$

$Slope = \frac{y_2-y_1}{x_2-x_1}$

$Slope = \frac{313-50}{2-0}$

Slope =131.5

$Slope = \frac{y_3-y_2}{x_3-x_2}$

$Slope = \frac{1950-313}{4-2}$

Slope =818.5

Since the slope is not same . So, it is not a linear relationship

$\frac{y_2}{y_1}=\frac{313}{50}=6.25\\\frac{y_3}{y_2}=\frac{1950}{313}=6.25$

Since the ratio between the consecutive outputs is same so, it is exponential relationship.

Formula : $y=ab^t$

Where a is the initial value = 50

b = rate of change = 6.25

The model for V(t) ,the number of views, t ,months after it's uploaded, best fits the data

So $,V(t)=50(6.25)^t$

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2 years ago