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yawa3891 [41]
3 years ago
8

Determine if the following system of equations has no solutions, infinitely many

Mathematics
1 answer:
DochEvi [55]3 years ago
8 0

Answer:

There is one solution

Step-by-step explanation:

2x + y = -1

8x + 3y = -2

Multiply the first equation by -4

-8x -4y = 4

Then add the equations together to eliminate x

-8x -4y = 4

8x + 3y = -2

--------------------

   -y = 2

Multiply by -1

y =-2

Now find x

2x+y =-1

2x+-2 =-1

Add 2 to each side

2x-2+2=-1+2

2x=1

Divide by 2

x = 1/2

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MAVERICK [17]
We can simplify this problem by pairing like terms together.

9x + 15x - 2x + 2
22x + 2

This expression can be simplified down to
22x + 2
8 0
3 years ago
Read 2 more answers
What is the mixed number for 14/3
Elena-2011 [213]
The mixed number for 14/3 is 4 2/3
4 0
3 years ago
Read 2 more answers
What is 3/9 =4/y y equals
mariarad [96]

Answer:

Y = 12

Step-by-step explanation:

3/9 = 4/y

By cross multiplying, we get

3*y = 4*9

3y = 36

Y = 12

4 0
3 years ago
The mean age of Mr Jasmi,Miss Haslinda and their three children is 38 years. The mean age of their three children is 18 years. C
DedPeter [7]
Answer: 68

Explanation:

Let x be the age of Mr Jasmi
y be the age of Miss Haslinda
a + b + c be the age of the 3 children

We can write:
(x + y + a + b + c)/5 = 38

But:
(a + b + c)/3 = 18
a + b + c = 18(3)
a + b + c = 54

Substitute this value to our first equation

(x + y + 54)/5 = 38
x + y + 54 = 38(5)
x + y + 54 = 190
x + y = 190 - 54
x + y = 136

Thus:
Mean age of (mr jasmi and miss Linda) = (x+y)/2

But x + y = 136

=> mean age = 136/2 = 68
4 0
3 years ago
Eight is less than 4 times another number can be shown by the inequality 8 &lt; 4n. Choose the answer that make this inequality
gladu [14]

Answer:

n < 2

Step-by-step explanation:

Let

The unknown number = n

8 < 4n

n < 8 / 4

n < 2

therefore, n must be less than 2

If n = 2

Then, 8 Will be equal to 4 times the number

7 0
3 years ago
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