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Mnenie [13.5K]
3 years ago
13

What is 7x+5=-9? Show your work.

Mathematics
2 answers:
dexar [7]3 years ago
5 0
7x+5=-9
Subtract 5 on both sides
7x=-14
Divide 7 on both sides
X=-14/7=
-2
vagabundo [1.1K]3 years ago
4 0

We have

7x+5=-9.

1. Subtract 5 from both sides to get

7x=-9-5\Longrightarrow 7x=-14.

2. Divide both sides by 7 to get

x=\dfrac{-14}{7}=\boxed{-2}

Hope this helps.

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PLEASE HELP <br><br><br> Complete the square x² + 16.0
Sonbull [250]

Answer:

x^2 + 16x + 32

Step-by-step explanation:

I am going to guess this is from factoring.

In which you need to x's multiplied together to get x^2. So you have:

(x+?) (x+?)

to get 16x you need two 8x's in your factoring square. so it would be

(x+8) (x+8)

Now you found out what you were mulitpling together, then you solve. The final part is multiplying 8 by 8, which is 32.

6 0
3 years ago
Solve the linear programming problem. Minimize and maximize Upper P equals negative 20 x plus 30 y Subject to 2 x plus 3 y great
Alika [10]

Answer:

Maximum = 540 at (6,14)

Minimum = 300 at (0,10) or (12,2).

Step-by-step explanation:

The given linear programming problem is

Minimize and maximize: P = 20x + 30y

Subject to constraint,

2x+3y\ge 30            .... (1)

2x+y\le 26            .... (2)

-2x+3y\le 30            .... (3)

x,y\geq 0

The related equation of given inequalities are

2x+3y=30

2x+y=26

-2x+3y=30

Table of values are:

For inequality (1).

x      y

0     10

15     0

For inequality (2).

x      y

0     26

13     0

For inequality (3).

x      y

0     10

15     0

Pot these ordered pairs on a coordinate plane and connect them draw the corresponding related line.

Check each inequality by (0,0).

2(0)+3(0)\ge 30\Rightarrow 0\ge 30    False

2(0)+(0)\le 26\Rightarrow 0\le 26     True

-2(0)+3(0)\le 30\Rightarrow 0\le 30    True

It means (0,0) is included in the shaded region of inequality (2) and (3), and (0,0) is not included in the shaded region of inequality (1).

From the below graph it is clear that the vertices of feasible region are (0,10), (6,14) and (12,2).

Calculate the values of objective function on vertices of feasible region.

Point           P = 20x + 30y

(0,10)           P = 20(0) + 30(10) = 300

(6,14)           P = 20(6) + 30(14) = 540

(12,2)           P = 20(12) + 30(2) = 300

It means objective function is maximum at (6,14) and minimum at (0,10) or (12,2).

7 0
3 years ago
Choose the greatest fraction.
VikaD [51]

Answer:

1/5 is the answer

Step-by-step explanation:

its the greatest fractions, out of the options you picked

3 0
2 years ago
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A metric unit of length that is equal to one thousandth of a meter is.......
12345 [234]
The metric unit of length that is equal to one thousandth of a meter is a millimeter. 1 meter = 1000 millimeter

hope this helps
3 0
4 years ago
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Find the vertex of the following equation <br>y= (x+9)^2+8<br>​
Olegator [25]
(-9,8) is the answer (h,k) is the equation
8 0
3 years ago
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