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Dovator [93]
2 years ago
7

Solve for x: (x^2+2x)+x+2=0

Mathematics
2 answers:
castortr0y [4]2 years ago
5 0

Answer:

x=-5

Step-by-step explanation:

(x^{2} +2x)+x+2=0\\(3x^{2} )+x+2=0\\3x^{2} +x=-2\\9x+x=-2\\10x=-2\\x=-5

Hope This Helps!!!!!

anyanavicka [17]2 years ago
3 0

Answer:

x=-1 or  x=-2

Step-by-step explanation:

Given Equation:

(x^2+2x)+x+2=0

Solving the like terms:

x^2+2x+x+2=0\\\\x^2+3x+2=0

Solving the quadratic equation using Factorization Method:

x^2+x+2x+2=0

Taking common from the equation to make the factors:

x(x+1)+2(x+1)=0\\\\(x+1)(x+2)=0\\\\x+1=0\\\\x=-1\\\\OR\\\\x+2=0\\\\x=-2

The solution of the equation is:

x=-1 or  x=-2

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Stoplight a changes color every 30 seconds and stoplight b changes every 40 seconds. after how many seconds will the stoplights
andrey2020 [161]

Answer:

After 120 seconds

Step-by-step explanation:

Here, we want to know the number of seconds after which both spotlights will change colors at the same time again.

Basically, what we want to do here is to

calculate the value with which 30 and 40 have the same multiples or we want to

calculate the lowest common multiple of 30 and 40

The multiples of 30 are 30,60,90,120 etc

The multiples of 40 are 40,80,120 etc

We can see that the lowest common multiple of both is 120

So therefore the spotlights will change colors at the same time after 120 seconds

6 0
2 years ago
Jill, Cathy, and Sand​y ​were in line for a roller coaster ride. How many ways could they be seated if the ride held 3 people in
vichka [17]

Answer:

6

Step-by-step explanation:

1x2x3=6

4 0
2 years ago
Put answer in coordinate form: 2x + 2y = -2 and 9x - 6y = 36
zhannawk [14.2K]
Coordinate form is (x,y) using the variables respectively.

2x+2y=-2
-2y
2x= -2-2y
/2

x=-1-y

9x-6y=36
9 (-1-y)-6y=36
-9-9y-6y=36
+9.
-9y-6y=45
-15y=45
/-15
y=-3

x=-1-y
x=-1- (-3)
x=2

answer: (2,-3)
5 0
2 years ago
Marcel and Floyd are playing games at an arcade. Marcel has $8.25 and is only playing $0.25 games. Floyd has $9.75 and is only p
EleoNora [17]

Answer:

3 games each

Step-by-step explanation:

because $0.75 is 3 times $0.25

Marcel:  0 plays= $8.25, 1 play=$8, 2 plays= $7.75, 3 plays= $7.5

Floyd :    0 plays= $9.75 1 play =$9.00 , 2 plays= $8.25, 3 plays = $7.5

not sure if this is the answer ???

5 0
2 years ago
Read 2 more answers
1) त्रिभुज LOK को क्षेत्रफल पत्ता लगाउनुहोस् । जहाँ
siniylev [52]

Answer:

hope this helps you.keep it up..

7 0
2 years ago
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