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Anuta_ua [19.1K]
3 years ago
13

For the given equation, find the values of a, b, and c, determine the direction in which the parabola opens, and determine the y

-intercept. Decide which table best illustrates these values for the equation:
y = 3 x squared + 2 x minus 8

Mathematics
1 answer:
mariarad [96]3 years ago
7 0

Answer:

Table A

Step-by-step explanation:

y  = 3x^2 +2x -8

The quadratic is in the form

y = a x^2 +bx+c

a = 3  b = 2 c = -8

Since a > 0 it opens up

The y intercept is c so the y intercept is -8

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Step-by-step explanation:

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Explain how to solve 4^(x+3)=7 using the change of base formula log_by=log y/ log b. Round to the nearest thousandth
HACTEHA [7]

Answer:

x = -1.59

Step-by-step explanation:

We are here given a equation and we need to solve out for x. The given equation is ,

\sf\longrightarrow 4^{( x +3)}= 7

Take log to the base " e " on both sides , so that we can remove the variable from the exponent .

\sf\longrightarrow log_e 4^{x+3}= log_e 7

Simplify using the property of log , \sf log a^m = m log a , we have ,

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Distribute by opening the brackets ,

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This can be written as ,

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Divide both sides by ln 4 ,

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