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Norma-Jean [14]
3 years ago
13

Please help 15 points

Mathematics
2 answers:
Luda [366]3 years ago
6 0
I think it’s 5 I used another app and it said -5,5 which I think you choose the positive number
erma4kov [3.2K]3 years ago
6 0

Step-by-step explanation:

\tt{ x^2+x-25=x } ⠀

\tt{x^2+x-x=25  } ⠀

\tt{ x^2+\cancel{x}-\cancel{x}=25 } ⠀

\tt{ x^2=25 } ⠀

\tt{ x=\sqrt{25} } ⠀

\tt{ x=5~ or~ x=-5 } ⠀

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Select all the correct answers.
blsea [12.9K]
#4 a reflection across the x-axis is the only correct answer , the other ones aren’t correct .
7 0
2 years ago
Find the intersection point between the lines of equations:<br><br>2x-y+6=0 and 2x+3y-6=0 ​
Ugo [173]

Step-by-step explanation:

The two equation will intersect each other at the point which will be the solution of the given two equations , and the given equations are ,

\implies 2x -y +6=0\\\\\implies 2x + 3y -6=0

On subtracting the given equations we have,

\implies -y - 3y +6 -(-6) = 0 \\\\\implies -4y = -12 \\\\\implies y = -12/-4\\\\\implies y = 3

Put this value in any equation , we have ,

\implies 2x -3 +6 =0\\\\\implies 2x = -3 \\\\\implies x =\dfrac{-3}{2} \\\\\implies x =-1.5

Hence the lines will Intersect at ,

\implies\underline{\underline{ Point=(-1.5, 3)}}

8 0
2 years ago
Read 2 more answers
Give the properties for the equation -2x 2 - y + 10x - 7 = 0.
Sladkaya [172]

Given:

The quadratic equation is

-2x^2-y+10x-7=0

To find:

The vertex of the given quadratic equation.

Solution:

If a quadratic function is f(x)=ax^2+bx+c, then

Vertex=\left(\dfrac{-b}{2a},f(\dfrac{-b}{2a})\right)

We have,

-2x^2-y+10x-7=0

It can be written as

-2x^2+10x-7=y

y=-2x^2+10x-7           ...(i)

Here, a=-2,b=10,c=-7.

\dfrac{-b}{2a}=\dfrac{-10}{2(-2)}

\dfrac{-b}{2a}=\dfrac{-10}{-4}

\dfrac{-b}{2a}=\dfrac{5}{2}

Putting x=\dfrac{5}{2} in (i), we get

y=-2(\dfrac{5}{2})^2+10(\dfrac{5}{2})-7

y=-2(\dfrac{25}{4})+\dfrac{50}{2}-7

y=\dfrac{-50}{4}+25-7

y=\dfrac{-25}{2}+18

On further simplification, we get

y=\dfrac{-25+36}{2}

y=\dfrac{11}{2}

So, the vertex of the given quadratic equation is \left(\dfrac{5}{2},\dfrac{11}{2}\right).

Therefore, the correct option is A.

3 0
2 years ago
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Nimfa-mama [501]
You divide and you get the awncer
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3 years ago
70 pages assigned to read , 90% read what is the number of pages read
Bezzdna [24]

Answer:

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Step-by-step explanation:

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5 0
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