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mars1129 [50]
3 years ago
11

Someone please help me out here.

Mathematics
1 answer:
Natasha2012 [34]3 years ago
8 0

Answer:

1) 3x²+8x

2) 3x²+2x+2

3) -3x²-2x-2

4) 9x³+12x²-2x-1

5) 3x²+5x+1/3x-1

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X^2 + 6x - 18 solve for x​
Simora [160]

Answer:

x = - 3  ± √27 or if you want it in decimal form correct to  nearest hundredth:

x = -8.20, 2.20.

Step-by-step explanation:

x^2 + 6x - 18 = 0

this will not factor so we use completing the square:

x^2 + 6x = (x + 3)^2 - 9 so:

(x + 3)^2 - 9 - 18 = 0

(x + 3)^2 = 27

x+ 3 = ±√27

x = - 3  ± √27

4 0
2 years ago
Read 2 more answers
A total of 165 people attended the opening night of a school play. Adults were charged $6, and children were charged $2. The tot
arlik [135]
-------------------------------------------------------------------------
Given Information
-------------------------------------------------------------------------
Total number of people = 165
Adult = $6
Child = $2
Total collected = $618

-------------------------------------------------------------------------
Assumptions 
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Let x be the number of adults and y be the number of children

-------------------------------------------------------------------------
Form equations
-------------------------------------------------------------------------
Total number of people
x + y = 165
Total amount collected 
6x + 2y = 618

-------------------------------------------------------------------------
Ans: The two equations are x + y = 165 and 6x + 2y = 618
-------------------------------------------------------------------------


The question is not asking for it but if you need to solve the equation to find the answer to x and y

-------------------------------------------------------------------------
Present the two equations and solve for x and y
-------------------------------------------------------------------------
x + y = 165          ------------------------- (eqn 1)
6x + 2y = 618      ------------------------- (eqn 2)

(eqn 1) : 
x + y = 165
x = 165 - y -------------------------  substitute into (eqn 2)

6(165 - y) + 2y = 618
990 - 6y + 2y = 618
4y = 990 - 618
4y = 372
y = 93 -------------------------  substitute into (eqn 1)

x + y = 165
x + 93 = 165
x = 165 - 93
x = 72 

x = 72 and y = 93

-------------------------------------------------------------------------
Ans: 72 adults and 93 children
-------------------------------------------------------------------------
5 0
3 years ago
Read 2 more answers
The diameter of a circle is 1034 inches.
Murrr4er [49]

Answer:

517

Step-by-step explanation:

The radius of a circle is just half of the diameter (1/2d = r)

1034/2 = 517

7 0
2 years ago
Please help and I give brainlest
3241004551 [841]

Answer:

1/8 for each friend.

Step-by-step explanation:

1/8 + 1/8 + 1/8 + 1/8 = 1/2

3 0
2 years ago
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a car is going west at 60mi/hr for 5 hours how can you write that the car is travelling west with a number
Ierofanga [76]

Answer:

Step-by-step explanation:

not sure I understand the question but

60mi/h west?

5 0
3 years ago
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