2 years ago

Samantha wants to redecorate her room. She would like to replace the carpet and needs

Mathematics

2 answers:

CaHeK987 [17]2 years ago

6 0

There are No pictures

spayn [35]2 years ago

6 0

Lol you need pictures

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What’s the vertex form of F(x)=x^2+2x-3

kupik [55]

Answer:

$\large\boxed{f(x)=(x+1)^2-4}$

Step-by-step explanation:

$\text{The vertex form of a quadratic equation}\ f(x)=ax^2+bx+c:\\\\f(x)=a(x-h)^2+k\\\\(h,\ k)-\text{vertex}\\=====================================$

$\bold{METHOD\ 1:}\\\\\text{convert to the perfect square}\ (a+b)^2=a^2+2ab+b^2\qquad(*)\\\\f(x)=x^2+2x-3=\underbrace{x^2+2(x)(1)+1^2}_{(*)}-1^2-3\\\\f(x)=(x+1)^2-4\\==============================$

$\bold{METHOD\ 2:}\\\\\text{Use the formulas:}\ h=\dfrac{-b}{2a},\ k=f(k)\\\\f(x)=x^2+2x-3\to a=1,\ b=2,\ c=-3\\\\h=\dfrac{-2}{2(1)}=\dfrac{-2}{2}=-1\\\\k=f(-1)=(-1)^2+2(-1)-3=1-2-3=-4\\\\f(x)=(x-(-1))^2-4=(x+1)^2-4$

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3 years ago

For a particular event, 709 tickets were sold for a total of $1,780. If students paid $2 per ticket and non students paid $3 per

Alex73 [517]

Answer:

709

Step-by-step explanation:

7 0

2 years ago

Can someone please help me the answer is not 133 or 109 please and thank you

schepotkina [342]

Answer:

Step-by-step explanation:

12/3=4

45/3=15-4-7=4 * the witch doesn't have a wand or spoon like the top row does.

21/3=7

4+4x7*order of operations

4+28

8 0

2 years ago

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Is 2,6 a solution to x+y=8 and 3x-y=0

algol13

Answer:

Yes.

Step-by-step explanation:

x=2

y=6

(2) + (6) = 8

8 = 8

3(2) - (6) = 0

6 - 6 = 0

0 = 0

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2 years ago

Middle school level math!<br> easy easy!<br> please help!

Sloan [31]

The answer is 12x^2. you multiply -4 by -3

7 0

3 years ago

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