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Anettt [7]
3 years ago
7

If x divided 9=9 how do u know what x is

Mathematics
2 answers:
Liono4ka [1.6K]3 years ago
8 0
Algebra:
x     = 9   Multiply both sides of the equation by 9 to keep them equal.
__
9

x*9  = 9*9   What is 9*9?
___
9

x = 9*9
Volgvan3 years ago
7 0
X is 1 because if you times it by x it equals it number
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Simplify by adding
Musya8 [376]

Answer:

=3x^2-3x-7

Step-by-step explanation:

\mathrm{Remove\:parentheses}:\quad \left(a\right)=a

=3x^2+2x-5x-7

\mathrm{Add\:similar\:elements:}\:2x-5x=-3x

=3x^2-3x-7

5 0
3 years ago
The cost, in dollars, of manufacturing x microwaves is 6,000 + 300x dollars. The amount received when selling these x microwaves
densk [106]

Answer:

21 microwaves

Step-by-step explanation:

The net profile is equal to the income less the total cost, so the equation to the net profile NP is:

NP = 700x - (6000 + 300x)

Where 700x is the income and (6000+300x) is the cost of manufacturing.

Now, replacing NP by 2400 and solving for x, we get:

2400 = 700x - (6000 + 300x)

2400 = 700x - 6000 - 300x

2400 + 6000 = 400x

8400 = 400x

\frac{8400}{400}=x\\ 21=x

So, the least number of microwaves that must be manufactured and sold so that the net profit is $2400 is equal to 21.

4 0
3 years ago
Answer the three following question and will mark Brainliest
Debora [2.8K]
The max is -2,6 because that’s where the highest point is shown at
3 0
3 years ago
Which value of k would cause the system of linear equations 35 x 14 y = 119 and 5 x 2 y = k to have an infinite number of soluti
larisa86 [58]

To solve the question we must know about the System of equations.

<h2>System of equation</h2>

<h2>Inconsistent System</h2>

A system of equations to have no real solution, the lines of the equations must be parallel to each other.

<h2>Consistent System</h2><h3>1. Dependent Consistent System</h3>

A system of the equation to be Dependent Consistent System the system must have multiple solutions for which the lines of the equation must be coinciding.

<h3>2. Independent Consistent System</h3>

A system of the equation to be Independent Consistent System the system must have one unique solution for which the lines of the equation must intersect at a particular.

The value of k should be 17 so that the system of equations gives infinite number of solutions.

<h2>Explanation</h2>

Given to us

  • 35x + 14y = 119
  • 5x +2y = k

As we know that for a system of equations to give an infinite number of solutions. the equations of the system must be either same or in ratio.

<h3>In Equation 1</h3>

35x + 14y = 119,

dividing both the sides of the equation by 7,

\dfrac{35x + 14y}{7} = \dfrac{119}{7}\\\\&#10;\dfrac{35x}{7}+\dfrac{14y}{7} = \dfrac{119}{7}\\&#10;5x+2y = 17

As already discussed the system of equations to give infinite number of solutions, the equations must be the same. therefore, comparing both the equations we see that the value of k should be 17.

Hence, the value of k should be 17, so that the system of equations gives infinite number of solutions.

<h3>Verification</h3>

As we can see in the below image on equating the value of k as 17, the line of the system of equations coincides, therefore, the system will have infinite number of solutions.

Learn more about System of Equations:

brainly.com/question/12895249

3 0
2 years ago
Chika left his house by 7.05pm and returned by 1.00pm. How long did he spend outside his house​
Yakvenalex [24]

Answer:

Step-by-step explanation:

7.05 p.m we can call it as 19.05

and 1.00 p.m means 13.00

so time  from 19.05 to 24.00 is = 24.00-19.05= 4.55 hr

from 24.00 to 13.00 is = 13.00 hr

so total hr is 4.55 + 13.00= 17.55 hr

5 0
2 years ago
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