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Sladkaya [172]
3 years ago
8

How many solutions 2x+3y=-3 and 3x + 5y = -9

Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
8 0
Since the slopes of the two lines are the not equal, they will have only one solution. The solution will be a point and can be found using the method given below.

We can find the solutions by simultaneously solving the two equations.

From first equation, the value of y comes out to be:

2x+3y=-3 \\  \\ 
3y=-3-2x \\  \\ 
y= \frac{-3-2x}{3}

Using this value of y in second equation, we get:

3x+5( \frac{-3-2x}{3} )=-9 \\  \\ 
9x-15-10x=-27 \\  \\ 
-x=-27+15 \\  \\ 
-x=-12 \\  \\ 
x=12

Using this value of x, we can find y:

y= \frac{-3-2x}{3}= \frac{-3-24}{3} =-9

Therefore, there is only one solution to the given equations is which is (12, -9)
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Step-by-step explanation:

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3 years ago
Complete the square please.
Aleks04 [339]

Answer:

(x-3)^2 + (y+2)^2 = 9^2

Step-by-step explanation:

x^2 -6x+y^2+4y-68 = 0

Complete the square

x^2 -6x+y^2+4y-68+68 = 0+68

x^2 -6x+y^2+4y = 68

Find the term to add for x

-6 /2 = -3  -3^2 = 9

Find the term to add for y

4/2 =2  2^2 = 4

Add 9 and 4

x^2 -6x+9+y^2+4y+4 = 68+9+4

(x-3)^2 + (y+2)^2 = 81

(x-3)^2 + (y+2)^2 = 9^2

The standard form is

(x-h)^2 + (y-k)^2 = r^2 where (h,k) is the center and r is the radius

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3 years ago
Three distinct lines, all contained within a plane, separate that plane into distinct regions. what are all of the possible numb
BlackZzzverrR [31]

The solution is attached as a word file.

Download doc
3 0
2 years ago
Assume that you have saved $2,000 for the purchase. How much of this money will you be able to put towards the purchase price of
nexus9112 [7]
<h3>What is Cost Price?</h3>

This refers to the price which a seller or a merchant purchased a good and this would be a good determinant to find out the selling price so that he could make a good profit.

<h3>Selling Price</h3>

This refers to the price which a good is sold and there are several factors which are taken into account such as:

  • Expenses
  • Cost Price, etc.

Mathematically, the<em> profit= </em>Cost price - Selling Price (Expenditure)

Please note that your question is incomplete so I gave you a general overview so that you could have a better understanding of the concept.

Read more about cost price here:

brainly.com/question/19104371

6 0
2 years ago
Which is not equivalent to 45 over 75 ?
statuscvo [17]
D. 70% because 45/75=0.6 or 60% and 60% doesn't equal to 70%
Hope this helps!!
5 0
3 years ago
Read 2 more answers
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