Y=x^2-5
y=2x-5
y+5=2x
x=(y+5)/2
y=((y+5)/2)^2-5
y=(y^2+10y+25)/4-5
4y=y^2+10y+25-20
0=y^2+6y+5
0=(y+5)(y+1)
y= -5 or -1
y=2x-5 (y= -5 doesn't work for this one so use -1)
-1=2x-5
2x=4
x=2
Using these answers, you can choose answer D with reasonable certainty.
Additive inverse is what you add to a number to get zero.
You are given 1.4 so you need to ADD -1.4 to get zero.
h=-1.4
Answer:
28
Step-by-step explanation:
Volume = Area of cross section x length
= (1/2 x 2 x 4) x 7
= 28
The answer is D.
9/12 = 3/4
16/24 = 2/3
2/3 is not equivalent to 3/4
Decreased by 25%
find 25% of 12 and decrease 12 by it
percent means parts out of 100
25%=25/100=1/4
'of' means multiply
25% of 12=1/4 times 12=3
decrease 12 by 3
12-3=9
answer is 9
