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2 years ago

PLS HELP I NEED HELP ASAP

Mathematics

2 answers:

melisa1 [442]2 years ago

8 0

960 cubic centimeters

monitta2 years ago

6 0

Answer:

960 cubic centimeters

Step-by-step explanation:

Base area is area of triangle: b*h*1/2

= 12*8*1/2 = 48

Base area times height is 48*20 = 960

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Ad libitum [116K]

Answer: <em>"7 is a solution to the original equation. The value –1 is an extraneous solution."</em>

Step-by-step explanation:

The equation $x=\sqrt{6x+7}$ can be solved by squaring both sides:

$x^2 = 6x + 7\\\\x^2 - 6x - 7 = 0\\\\(x-7)(x+1) = 0$

We can see that -1 and 7 are solutions, but make sure they are not extraneous by substituting them in the original equation:

$1 = \sqrt{-1}\\ 7 = \sqrt{49}$

The square root of 49 equals 7, but the square root of -1 is an imaginary number.

The correct choice is <em>"7 is a solution to the original equation. The value –1 is an extraneous solution."</em>

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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