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3 years ago

Which of the following are solutions to the equation below? Check all that apply. 9x2 – 64 = 0

Mathematics

2 answers:

erik [133]3 years ago

6 0

Answer:

x= 8/3 and x= -8/3

Step-by-step explanation:

Remember the difference of two squares method

a²- b²= (a+b) (a-b)

Given;

9x²-64=0

We notice 9 and 64 are in square form thus can be written as

(3x-8) (3x+8)....................................applying the difference in squares method to simplify

Solving for x

(3x-8) (3x+8) =0

3x-8=0

3x=8

x= 8/3

3x+8=0

x= -8/3

Andrej [43]3 years ago

6 0

Answer:

8/3 and -8/3

Step-by-step explanation:

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Slav-nsk [51]

Answer:

$y - 35 = 6(x - 5)$

Step-by-step explanation:

The point-slope equation of a line is

$y - y_1 = m(x - x_1)$ ,

where

$m = slope = \dfrac{y_2 - y_1}{x_2 - x_1}$

and the point is

$(x_1, y_1)$

Let's find the slope.

$m = slope = \dfrac{-31 - 35}{-6 - 5}$

$m = \dfrac{-66}{-11}$

$m = 6$

We are asked to use the first point in the equation, so

$x_1 = 5$ and $y_1 = 35$

The equation is:

$y - 35 = 6(x - 5)$

4 0

3 years ago

In a geometry class, the students were asked to prove the theorem below by contradiction.

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<span>The contradiction term for "at most one obtuse angle" is "no obtuse angles
so therefore i conclude that the </span> statement she will most likely use as an assumption is
Let each angle of a triangle be acute
so option A is correct
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3 years ago

Sean used 3/4 of sugar to make a dozen brownies. how many sugar is in each brownie

charle [14.2K]

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3 years ago

What is the r-value of the following data to three decimal places

Liula [17]

Answer:

option B

$-0.953$