3 years ago

Derek wants to find the area of this triangle. Which unit of measurement should he use? A. yd2 B. yd C. yd3

1 answer:

3 0

It is c cause of the right angle

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8_murik_8 [283]

$y=2x^2+8x-9\\D=b^2-4ac\\D=64-4(2)(-9)\\D=64+72 > 0$

There are 2 roots so the only way to complete the square is,

$y=2x^2+8x-9\\y=2[(x^2+4x)]-9\\y=2[(x^2+4x+4)-4]-9\\y=2[(x+2)^2-4]-9\\y=2(x+2)^2-8-9\\y=2(x+2)^2-17$

Just factor 2 out of 2x^2+8x (just ignore the -9) then find the number that will make the terms be able to complete the square.

then complete the square and multiply 2 inside the brackets.

subtraction as you already get the vertex form and know how to complete the square.

Vertex Form: $y=2(x+2)^2-17$

3 0

3 years ago

Studentka2010 [4]

Answer:

2/4

Step-by-step explanation:

7 0

2 years ago

TiliK225 [7]

Well 16x12=192 then subtract it by 8 and 184 rolls were eaten! OMG

3 0

3 years ago

barxatty [35]

Answer:

id k give a second

Step-by-step explanation:

7 0

1 year ago

Kryger [21]

Answer: 5/8

hope that helps :)

5 0

2 years ago