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Molodets [167]
3 years ago
14

Simplify a^2+ab-2b^2/a^2-2ab-3b^2

Mathematics
2 answers:
Ahat [919]3 years ago
8 0

a4b2 + 2a4 - 12a3b - 2ab3 - 4b2  

 ———————————————————————————————

               2a2              

klasskru [66]3 years ago
5 0

Simplify a^2+ab-2b^2/a^2-2ab-3b^2


Answer: -(2 b^2)/a^2 + a^2 - a b - 3 b^2

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4. Make up a system of equations with infinite<br> solutions
Taya2010 [7]

Answer:

\left \{ {{x+y=1} \atop {2x+2y=2}} \right.

Step-by-step explanation:

As long as the two equations represent the same straight line on the coordinate plane (they overlap), there will be infinite many intersections and infinite number of solutions.

6 0
3 years ago
What is 7.25 in word form
Vikentia [17]

Answer: seven and twenty-five hundredths


Step-by-step explanation:

just need to know how to say it

6 0
3 years ago
Tell whether x and y show direct variation.Explain your reasoning.If so, find k #3
WINSTONCH [101]

Answer:

x and y do not show direct variation.  

Step-by-step explanation:

The formula for direct variation is

y = kx     Divide each side by y

k = y/x

k should have the same value for every point except, of course, (0,0)

For the first point,

k = 2/(-1) = -2

For the third point,

k = 2/1 = 2

The values of k are different, so x and y <em>do not</em> show direct variation.

7 0
3 years ago
Read 2 more answers
HELP MEEEEEEEEEE Package A contains 3 birthday cards and 2 thank-you notes and costs $9.60. Package B contains 8 birthday cards
hodyreva [135]

Answer:

Each birthday card costs $2.2 ⇒ answer c

Step-by-step explanation:

* Lets explain how to solve the problem

- Package A contains 3 birthday cards and 2 thank-you notes

- It costs $9.60

- Package B contains 8 birthday cards and 6 thank-you notes

- It costs $26.60

- x represents the cost of birthday card and y represents the cost of

 thank-you note

* Lets change these information to two equations

∵ x represents the cost of each birthday cards

∵ y represents the cost of each thank-you notes

∵ Bag A contains 3 birthday cards and 2 thank-you notes

∵ Bag A costs $9.60

∴ 3x + 2y = 9.60 ⇒ (1)

∵ Bag B contains 8 birthday cards and 6 thank-you notes

∵ Bag B costs $26.60

∴ 8x + 6y = 26.60 ⇒ (2)

* Lets solve this system of equations to find x and y

- Multiply equation (1) by -3 to eliminate y

∵ -3(3x) + -3(2y) = -3(9.60)

∴ -9x - 6y = -28.8 ⇒ (3)

- Add equations (2) and (3)

∴ -x = -2.2

- Multiply both sides by -1

∴ x = 2.2

∵ x represents the cost of each birthday cards

∴ The cost of each birthday card is $2.2

* Each birthday card costs $2.2

6 0
3 years ago
Read 2 more answers
How do you solve 6-4(-3)-5?
Mnenie [13.5K]

-3(5-6)-4(2-3)

Handling parentheses first:

-3(-1)-4(-1)

Multiplication left to right:

3-4(-1)

3-(-4)

Rewriting the above we have:

3+4=7

4 0
3 years ago
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