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Irina-Kira [14]
2 years ago
14

20 PTS+BRAINLIEST 8th Grade Simple quadratic equation- answers for points will be reported :)

Mathematics
2 answers:
weqwewe [10]2 years ago
7 0

Answer:

-7x + 6 = x² - 7x

-7x + 7x +6 - x² = 0

0 + 6 - x² = 0

-x² + 6 = 0

-x² = (-6)

x² = 6

x = ±√6

x =√6 or x = -√6

nadezda [96]2 years ago
5 0

Answer:

x = √6 or - √6

Step-by-step explanation:

<u>equation</u>: -7x + 6 = x² - 7x

switch sides:

x² - 7x = -7x + 6

Add 7x to both sides,

x² - 7x + 7x = -7x + 7x + 6

x² = 6

For x² = f(a) the solution are x = √f(a), -√f(a)

x = √6 , x = - √6

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0, hes getting too fat.

Step-by-step explanation: Dam-n fat bast-ard.

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Varvara68 [4.7K]
I think the answer is 2 13/20
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3 0
3 years ago
Solve each system of equations using the elimination method<br><br> 3x+8y=2<br> 4x-2y=-10
LenaWriter [7]

x = -2

y = 1

let's multiply second equation by 4 to get a common coefficient of y variable.

16x-8y=-40

add the equations

3×+8y=2

16x-8y=-40

----------------

3x+16x = -38

19x = -38

x = -2

substitute x

3×-2 + 8y = 2

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check the answer

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8 0
3 years ago
(05.02)
Amiraneli [1.4K]

Answer:

y = x + 1

Step-by-step explanation:

1) First, find the slope of the line between the two points. Whichever option has the same slope would be the right answer. To find this, use the slope formula \frac{y_2-y_1}{x_2-x_1}. x_1 and y_1 represent the x and y values of one point, and x_2 and y_2 represent the x and y values of another point.

So, use the points given to answer the question. Substitute 4 for x_1, 5 for y_1, 8 for x_2, and 9 for y_2 then solve:

\frac{(9)-(5)}{(8)-(4)} \\= \frac{9-5}{8-4} \\= \frac{4}{4} \\= 1

Therefore, the slope is 1.

2) Any line that is in a "y = a number" format is a horizontal line, and all horizontal lines have a slope of 0 - so the second option can't be the answer.

The rest of the options are in slope-intercept form, or y = mx + b format. Remember that the coefficient of the term with the x is the slope. Knowing this, y = x + 1 would need to be the answer since the coefficient of the term with the x is 1, and we already calculated that the slope is 1.

4 0
3 years ago
The sum of three numbers is 117 . the third number is 3 times the second. the first number is 8 less than the second. what are t
tamaranim1 [39]
Let the second number be x.

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The first number is 17. The second number is 25. The third number is 75.
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4 years ago
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