All categories

3 years ago

X^2+11x<-18 solve for x

1 answer:

6 0

X^2+11x+18<0 ----- Subtract 18 from both sides
(x+2)(x+9)=0-------- Factor the left side
------Set factors equal to zero
Your answer is -9<x<-2

You might be interested in

How do you write 10% as a decimal?

Tatiana [17]

10% as a decimal is 0.10

Hope this helps!

5 0

3 years ago

Read 2 more answers

WILL GIVE BRAINLIEST, THANKS, AND 5 STARS! PLEASE HELP ME!

Bogdan [553]

Answer:

-4 and 4

Step-by-step explanation:

Method 1

Apply Difference of Two Squares Formula: $a^2-b^2=(a+b)(a-b)$

Given $x^2-16=0$

Rewrite 16 as 4²

Therefore, $a^2=x^2$ and $b^2=4^2$

$\implies a = \sqrt{x^2}=x$

$\implies b=\sqrt{4^2} =4$

$\implies x^2-16^2=(x+4)(x-4)$

$\implies (x+4)(x-4)=0$

$\implies (x+4)=0 \implies x=-4$

$\implies (x-4)=0 \implies x=4$

Method 2

Given equation:

$x^2-16=0$

Add 16 to both sides:

$\implies x^2-16+16=0 + 16$

$\implies x^2=16$

Square root both sides:

$\implies \sqrt{x^2}=\sqrt{16}$

$\implies x=\pm4$

Therefore, x = -4, x = 4

6 0

2 years ago

If the average mass of a peacock is 4.95 kilograms, what is the average mass of a peacock In grams?

anyanavicka [17]

Answer:

4950g

Step-by-step explanation:

firstly remember the formula for converting from kg to g

Kilograms ( kg) to grams(g)

1 kg = 1000g

therefore to convert 4.95 kg to g

is 4.95 * 1000

= 4950g

6 0

3 years ago

Why does it say this am i supposed to be ranked up or what?

tatiyna

Answer:

idk that's weird ( I'm just trying to get more points)

4 0

3 years ago

In 2008, the price of a gallon of unleaded gasoline was $4.02. In 1990, it was only $1.37 per gallon. What is the increase expre

Dima020 [189]

Answer:

In order to determine the change in percent, I divided 4.02/1.37 to get approximately 2.9. I expressed this as a percent to get 290%.

Step-by-step explanation:

4 0

2 years ago