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Morgarella [4.7K]

3 years ago

10

I’m new to this app! And i really need help.. PLEASE HELP!!!!!

1 answer:

aalyn [17]3 years ago

8 0

Step-by-step explanation:

a) $x^2 - 5x + 4 = (x - 1)(x - 4)$

b) $x^2 - 10x + 9 = (x - 1)(x - 9)$

c) $x^2 - 16x + 64 = (x - 8)^2$

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Plz help i dont know how to get the answer to Solve for x. x/3≤−6

Mekhanik [1.2K]

X<=-6*3

X<=-18

SO THAT IS THE ANSWER

8 0

3 years ago

Read 2 more answers

Describe the number and type of roots for the polynomial (how many real and complex?). x3 + 5x2 – 4x – 2 = 0

zloy xaker [14]

Descartes' rule of signs tells you the one sign change in the coefficients means there's one positive real root. If you change the sign of the odd-power terms, the signs become -++-, so have two sign changes. This means there are 0 or 2 negative real roots.

A graph shows there to be 3 real roots, two of which are negative. Thus there are no complex roots.

7 0

3 years ago

How much water should be added to 6 gallons of pure acid in order to obtain the 24% acid solution?

Helen [10]

Answer:

19 gallons

Step-by-step explanation:

Let x gallons be the amount of water which should be added to 6 gallons of pure acid in order to obtain the 24% acid solution.

Amount of water = x gallons

Amount of pure acid = 6 gallons

Amount of acid solution = x + 6 gallons

Amount of acid in acid solution = 24%

So, there are $0.24(x+6)$ gallons of acid in acid solution.

Hence,

$0.24(x+6)=6$

Solve this equation. Multiply it by 100:

$24(x+6)=600\\ \\24x+144=600\\ \\24x=600-144\\ \\24x=456\\ \\x=19\ gallons$

6 0

4 years ago

Read 2 more answers

Which expression would be equivalent to: Which expression would be equivalent to: \frac{1+b}{2} - 3(a-1)

IrinaVladis [17]

Answer:

$\frac{1+b}{2} - 3(a-1) = \frac{b- 6a+7}{2}$

Step-by-step explanation:

Given

$\frac{1+b}{2} - 3(a-1)$

Required

An equivalent expression

$\frac{1+b}{2} - 3(a-1)$

Take LCM

$\frac{1+b}{2} - 3(a-1) = \frac{1+b- 2*3(a-1)}{2}$

$\frac{1+b}{2} - 3(a-1) = \frac{1+b- 6(a-1)}{2}$

Open bracket

$\frac{1+b}{2} - 3(a-1) = \frac{1+b- 6a+6}{2}$

Collect like terms

$\frac{1+b}{2} - 3(a-1) = \frac{b- 6a+6+1}{2}$

$\frac{1+b}{2} - 3(a-1) = \frac{b- 6a+7}{2}$

Hence, an equivalent expression is:

$\frac{b- 6a+7}{2}$

8 0

3 years ago

Cho đường tròn tâm O , đường kính AB=13cm , CD=12cm và vuông góc với AB tại H

Studentka2010 [4]

Answer:

b

Step-by-step explanation:

6 0

3 years ago