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Roman55 [17]
3 years ago
13

Help! Can someone please explain how to do this. I have my final in one hour.​

Mathematics
1 answer:
aleksklad [387]3 years ago
6 0

Answer:

n= -3 and n= -6

Step-by-step explanation:

n^2 = -18 -9n

We need to solve this equation to find the value of n.

Rearranging:

n^2 +9n +18 =0

This is a quadratic equation and we can solve by using factorization method.

We need to make factors of 18n^2 such that their sum is equal to 9n.

So solving,

n^2 + 9n +18 =0\\n^2 + 6n + 3n +18 =0\\n(n+6) + 3(n+6)=0\\(n+3)(n+6) =0\\=> n+3 =0 \,\, and n+6 =0\\n= -3 \,\,and \,\,n=-6

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Need help asap im not good at math
katovenus [111]

most likely A,C,D,E 70% sure

6 0
3 years ago
Can someone help me?​
miss Akunina [59]

Answer:

A

Step-by-step explanation:

3 0
3 years ago
What is the solution set for 7x – 3 = 18, given the replacement set {0, 1,2,3,4} ? O
yawa3891 [41]

Answer:

X = 3

Step-by-step explanation:

Given the expression :7x - 3 = 18

To obtain the solution set ; we solve for X in the equation ;

7x - 3 = 18

Add 3 to both sides

7x - 3 + 3 = 18 + 3

7x = 21

Divide both sides by 7

7x / 7 = 21 / 7

x = 3

Hence, x = 3

4 0
3 years ago
Write the equation in slope-intercept form of the line that has a slope of 6 and contains the point (1, 1)
svlad2 [7]
m=6  , \ \ \ (1, 1) \\ \\To \  find \ our \  equation \ we \ will \ use \ the \ formula: \\ \\ y - y _{1} = m(x - x _{1}), wherem \ is \  the \ slope \ and \ (x _{1}, y _{1}) \  is \  the  \ point \\ \\m=6 , \ \ x_{1}=1 , \ \ y_{1} = 1\\\\y - 1 =  6(x-1)\\\\y-1=6x -6 \\\\y=6x-6+1\\\\y=6x-5
8 0
3 years ago
Read 2 more answers
Miranda bought a brand-new cell phone. She noticed that the battery
Artyom0805 [142]

The function model that represents the amount of battery left after a period  of time is y = 1 ₋ 10%x

Given, Miranda bought a new cell phone which is consuming battery at a rate of 5% for every half an hour.

We are required to establish a function model that depicts how much battery is remaining after a certain amount of time.

Let y represent the amount of battery left.

and x represent the number of hours.

Then 5% per half an hour = 5% × 2 = 10%

Now frame the function model:

The amount of battery left = 1 ₋ (rate percent at which battery is being consumed)(The number of hours left)

⇒ y = 1 ₋ 10%(x)

⇒ y = 1 ₋ 10%x

As a result, we obtained the function model for the battery's remaining capacity as y = 1 ₋ 10%x

Learn more about Function models here:

brainly.com/question/25638609

#SPJ9

5 0
1 year ago
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