All categories

4 years ago

What is x+3y=-11 -9y=33+3x in college algebra

1 answer:

8 0

x + 3y= -11 (1)
-9y = 33 + 3x ---->3x + 9y = -33 (2)

divide (2) equation by 2
3x + 9y = -33
x + 3y = -11 (2')
and equation (1) is also x + 3y= -11 (1)
so
x + 3y= -11 (1)
x + 3y= -11 (2')
---------------------subtract
0 = 0

answer:
infinitely many solutions

You might be interested in

What is the rational number equivalent to 1.28? The 1.28 has a line above the 28

Svetach [21]

the line over the 28 means the 28 repeats forever.
1.282828.... and so on
let x be the rational number 1.28...
we can use this trick:
100*1.282828....= 128.282828...
(the decimal 28 part repeats) 100x = 128.28...
next: 100x - x = 128.282828... - 1.282828...
the .282828... part will be subtracted away
99x = 127
divide both sides by 99 to get
x= 127/99

8 0

3 years ago

What fraction is equivalent to 0.7 repeated

pishuonlain [190]

.7 repeating would make it 7/9

3 0

3 years ago

Read 2 more answers

Drag each number to the correct location on the table. Each number can be used more than once, but not all numbers will be used.

muminat

Answer:

1. $12x^2-13.4x-11$

- Degree: 2

- Number of terms: 3

2. $7x^3+168$

- Degree: 3

- Number of terms: 2

3. $9x^4-9$

- Degree: 4

- Number of terms: 2

Step-by-step explanation:

For this exercise you need to remember the multiplication of signs:

$(+)(+)=+\\(-)(-)=+\\(-)(+)=-\\(+)(-)=-$

1. Given:

$(4x + 2.2)(3x - 5)$

Apply the Distributive property:

$=12x^2+6.6x-20x-11$

Add the like terms:

$=12x^2-13.4x-11$

You can idenfity that:

- Degree: 2

- Number of terms: 3

2. Given:

$(-304 +503 - 12) + (7x^3 - 25 + 6)$

Add the like terms:

$=187 + 7x^3 - 25 + 6=7x^3+168$

You can idenfity that:

- Degree: 3

- Number of terms: 2

3. Given:

$(3x^2 - 3)(3x^2 + 3)$

Apply Distributive property:

$=9x^4-9x^2+9x^2-9$

Add the like terms:

$=9x^4-9$

You can idenfity that:

- Degree: 4

- Number of terms: 2

8 0

3 years ago

What fraction of a pound is eighty pence

AnnZ [28]

4/5 is the the fraction of a pound is eighty pence

8 0

3 years ago

Read 2 more answers

After spending $3,450 for tables and $3,950 for chairs, a convention center manager finds that the total is 4% more than he spen

g100num [7]

We are given with two current costs : $3,450 for tables and $3,950 for chairs .The total cost then is equal to $7,400. This is said to be 4% more than he spent last year. so last year's expenses should be $7,400 / 1.04 equal to $7115.39. The cost last year is expected to be less

4 0

3 years ago

Read 2 more answers