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frosja888 [35]
3 years ago
13

Expand the following 5(2x-4)

Mathematics
1 answer:
Yuliya22 [10]3 years ago
8 0

Answer:

x= 2

Step-by-step explanation:

5*2= 10 then add the x at the end

5*4=20

then you divide both sides by 10

(10x/10)- (20/10)

x= 2

or if your rewriting it then:

(5*2x)- (5*4)=?

Hope this helped :D

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Answer:

x = 11

Step-by-step explanation:

sides are proportional so you can set up a proportional and cross-multiply:

JL is to PQ as LK is to QR

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5 0
2 years ago
Write an equation for a parabola that has a vertex (1, 2) and passes through the point (3, -6).
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Answer:

y= -2x²+4x.

Step-by-step explanation:

the common equation of the parabola is y=ax²+bx+c, where a, b, c - numbers.

1) the coordinates of the vertex are:

x_0=-\frac{b}{2a} \ and \ y_0=\frac{4ac-b^2}{4a}.

2) if according to the condition x₀=1, then b= -2a.

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it means that c=a+2.

3) if b= -2a; c=a+2 and the point (3;-6) belongs to the given parabola, then it is possible to substitute them into the common equation of the parabola:

-6=3²*a-6a+a+2; ⇔ a= -2.

4) if a= -2, then b=-2a=4, and c=a+2=0.

5) if a=-2, b=4 and c=0, then the required equation of the parabola is:

y= -2x²+4x.

6 0
2 years ago
Two questions.
AleksAgata [21]

Answer:


Step-by-step explanation:


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2 years ago
What is the GCF? 2x2-4x+8
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Answer:

the greatest common factor is 2, so the expression could be rewritten 2(x^{2} -2x+4)

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1 year ago
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