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sergey [27]
2 years ago
6

5x - 7= 3??? plz help

Mathematics
2 answers:
Leya [2.2K]2 years ago
6 0

Answer:

x = 2

Step-by-step explanation:

5x - 7 = 3

    + 7     +7       -7 cancels

5x = 10

/5      /5   5 cancels and you're left with x

x  =  2

Oliga [24]2 years ago
3 0

Answer:

x=2

Step-by-step explanation:

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rosijanka [135]

Answer:

Step-by-step explanation:

Our equations are

y = -3x^2 + x + 12\\y = 2x^2 - 6x + 5\\y = x^2 + 7x - 11\\y = -x^2 - 8x - 16\\

Let us understand the term Discriminant of a quadratic equation and its properties

Discriminant is denoted by  D and its formula is

D=b^2-4ac\\

Where

a= the coefficient of the x^{2}

b= the coefficient of x

c = constant term

Properties of D: If D

i) D=0 , One real root

ii) D>0 , Two real roots

iii) D<0 , no real root

Hence in the given quadratic equations , we will find the values of D Discriminant  and evaluate our answer accordingly .

Let us start with

y = -3x^2 + x + 12\\a=-3 , b =1 , c =12\\D=1^2-4*(-3)*(12)\\D=1+144\\D=145\\D>0 \\

Hence we have two real roots for this equation.

y = 2x^2 - 6x + 5\\

y = 2x^2 - 6x + 5\\a=2,b=-6,c=5\\D=(-6)^2-4*2*5\\D=36-40\\D=-4\\D

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y = x^2 + 7x - 11\\a=1,b=7,-11\\D=7^2-4*1*(-11)\\D=49+44\\D=93\\

Hence D>0 and thus we have two real roots for this equation.

y = -x^2 - 8x - 16\\a=-1,b=-8,c=-16\\D=(-8)^2-4*(-1)*(-16)\\D=64-64\\D=0\\

Hence we have one real root to this quadratic equation.

7 0
2 years ago
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Galina-37 [17]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
PLS SOLVE THANK YOU FOR SOLVING IF YOU DO
Ugo [173]

Answer:

Since the triangles are congruent, AB=ED so AB=14

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Step-by-step explanation:

8 0
2 years ago
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A display case for the artifact is in the shape of a cube. Each side of the display case is three times longer than the width ww
Katena32 [7]
A cube is a 3d object bounded by  6 square faces. 

Each side of the display case is 3 times longer than the width of the artifact.

width of the artifact = w
side of the cube = 3w

<span>a. Write an expression for the volume of the case.
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<span>Volume = 27w</span>³<span>

</span>
6 0
3 years ago
Factor the polynomial 8x² - 24x – 224 completely. A- 4(x + 4)(x-7) B- (4x + 16X(12x – 14) C- 8(x + 4)(x - 7) ht D- 2(4x + 16)(x
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Answer:

The correct answer would be...

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Hope this helps!

8 0
3 years ago
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