Question

http://prntscr.com/l6eh7i

Answer 1

@mhchen @kittybasil

Answer 2

mhchen is currently busy

Answer 3

\((5x^2-2x+1)-(3x-4)\)
Distribute the - and then combine like terms

Answer 4

A?

Answer 5

Right

Answer 6

http://prntscr.com/l6ejb0

Answer 7

\(\large(\frac{b}{2})^2\)

Knowing that \(f(x)=ax^2+bx+c\)

Substitute and simplify

Answer 8

Im not sure can you explain pls

Answer 9

@dude

Answer 10

@mhchen

Answer 11

Sorry about that Im about to head out, do you know the b value of the equation they gave you?

Answer 12

No lolol

Answer 13

@mhchen can u help?

Answer 14

So like a perfect square trinomial is

x + (2b)x + (b^2)

Here 2b = 3.

Find b^2

Answer 15

B?

Answer 16

or D?

Answer 17

none. Did you even try to solve for b in my equation?

Answer 18

If 2b = 3

b = (3/2)

and
b^2 = (3/2)^2

= (9/4)

understand?

Answer 19

Ohhh okay I see, got it

Answer 20

http://prntscr.com/l6ez78
how about this

Answer 21

okay so this one is a little bit harder.

In order for it to have 2 real solutions. It has to be simplified into (x+a)(x+b)
and to get there we need it in this form:

ax^2 + bx + c = 0

X + Y = b
X*Y = a*c

Answer 22

Here. b = -3.
a = 1

If c = -4 then

X could be -4
Y could be 1

X+Y = -3
X*Y = -4

so -4 would fit

Answer 23

http://prntscr.com/l6f4j2

Answer 24

A graph gets narrower when a gets higher:
\[y= ax^2\]

Which one of those is bigger than 5?

Answer 25

D

Answer 26

ye

Answer 27

http://prntscr.com/l6f69m

Answer 28

Roots are where the line crosses the x-axis.

Do you know where they are?

Answer 29

-2 and 3

Answer 30

yea

Answer 31

http://prntscr.com/l6faqx

Answer 32

So the vertex of any quadratic function
y = ax^2 + bx + c

is
\[\frac{-b}{2a}\]

Here b = 4
a = -2

Can you find
\[\frac{-b}{2a}?\]

Answer 33

1?

Answer 34

yes

Answer 35

http://prntscr.com/l6fkaf

Answer 36

So a side is 's'
Another side is 's+16'

Area = (s) * (s+16)

which one of those is (s) * (s+16)?

Answer 37

im thinking D

Answer 38

Well actually
s(s+16) = s*s + s*16
= s^2 + 16s

Answer 39

http://prntscr.com/l6fp63
http://prntscr.com/l6fpdu
http://prntscr.com/l6fpg5

this is all one question

Answer 40

That last image. I assume it's d.

Every time x increases by 4. y increases by 3.

Also it's positive.

And the y-intercept is 5.

Answer 41

http://prntscr.com/l6ftxa
http://prntscr.com/l6fu1w
http://prntscr.com/l6fu4m

Answer 42

@mhchen

Answer 43

The first one.

if you look at the original graph. There's the points (0.-2) and (4.0)

On the inverted graph it'll have (-2.0) and (0.4)

Answer 44

http://prntscr.com/l6g4j4

Answer 45

1 and 2?

Answer 46

there isnt a choice for 1 and 2

Answer 47

@Vocaloid

Answer 48

Oh I'm sorry I was thinking about whole numbers (my bad)

It's only 2.

natural numbers are 1 2 3 4 5...
whole numbers are 0 1 2 3 4 5...


I'm an idiot sorry

Answer 49

ohh ok lolll

are these right
http://prntscr.com/l6ga1z

Answer 50

@dude @mhchen

Answer 51

Yeah they're right

Answer 52

Make a new post, this is getting too crowded