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Fofino [41]
3 years ago
9

F(-9)=2-1/5. What is the solution

Mathematics
1 answer:
Murrr4er [49]3 years ago
5 0
<span>F(-9)=2-1/5
</span><span>F(-9)=1 5/5 - 1/5
</span><span>F(-9)=1 4/5</span>
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(2x–y)²–(y+2)²-----------
lilavasa [31]

Answer:

4x² -4xy -4y -4

Step-by-step explanation:

\boxed{ {a}^{2}  -  {b}^{2}  = (a + b)(a - b)}

In this case, a= 2x -y and b= y +2.

(2x -y)² -(y +2)²

= (2x -y +y +2)[2x -y -(y +2)]

= (2x +2)(2x -y -y -2)

= (2x +2)(2x -2y -2)

= 2x(2x) +2x(-2y) +2x(-2) +2(2x) +2(-2y) +2(-2) <em>(expand)</em>

= 4x² -4xy -4x +4x -4y -4

= 4x² -4xy -4y -4

Alternatively, start by expanding the brackets.

\boxed{(a - b)^{2}  =  {a}^{2} - 2ab \:  +  {b}^{2}  }

\boxed{(a + b)^{2}  =  {a}^{2}  + 2ab \:  +  {b}^{2} }

(2x -y)² -(y +2)²

= 4x² -4xy +y² -(y² +4y +4)

= 4x² -4xy +y² -y² -4y -4 <em>(</em><em>expand</em><em>)</em>

= 4x² -4xy -4y -4 <em>(</em><em>simplify</em><em>)</em>

3 0
3 years ago
Between which two square roots of integers could you find π?
AleksandrR [38]

pi = 3.14...

pi^2 = 9.86...

3^2 = 9

4^4 = 16

Pi is between sqrt(9) and sqrt(16).

7 0
3 years ago
Read 2 more answers
Ed is on a road trip. He has already traveled 225 miles and is driving at a rate of 62 miles per hour. Which equation could be u
11Alexandr11 [23.1K]

Answer: 62(x) + 225 = 605

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

I hope this helps you, and enjoy the rest of your day!!

7 0
3 years ago
28 please help I don't understand what it's asking
mixer [17]
Isn't it a function considered a function if it has no intersecting lines? Maybe you should graph it and see if it has intersecting lines or not. If it doesn't the it's a function if
it does then it's not. I think..?
7 0
4 years ago
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julia-pushkina [17]

Answer:

9/16 gallon

Step-by-step explanation:

You are given the ratio

... (3/16) gallon : (1/3) square foot

Multiply it by 3 (the inverse of 1/3).

... 3·(3/16) gallon : 3·(1/3) square foot

... 9/16 gallon : 1 square foot

5 0
4 years ago
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