Answer:
2
Step-by-step explanation:
Let the number be 
. Writing an equation in terms of the number, , gives
.
Adding 
to both sides gives
.
Then, subtracting 
from both sides gives
,
and dividing by 8 on both sides simplifies to
.
Answer:
9
Step-by-step explanation:
Once you plot this out, you can see that it is a parallelegram with a base of 3 and a height of three. The base is (-3,-2) to (0,-2) and the height extends to a y value of 1. You can also use triangles for this problem, but I would not suggest to do so because you can solve it a lot quicker this way.
4)
A=1/2 bh
A = 1/2(6)(3)
A = 9 in^2
5)
A=1/2 bh
A=1/2(7)(10)
A = 35 m^2
6)
A=1/2 bh
A=1/2(5)(8)
A=20 ft^2
7)
A=1/2 (b1+b2)h
A=1/2 (5+10)8
A=60 in^2
8)
A=1/2 (b1+b2)h
A=1/2 (13+19) 10
A=160 mm^2
9)
A=1/2 (b1+b2)h
A=1/2 (3+6) 2
A = 9 ft^2
14
Step-by-step explanation:
Her brother is 9 and she is 14.
say she is 14, 14+2=16 a perfect square.
14-10=4 which is the square root of 16.
So she is 14 and her brother is 9.
(He is a perfect square too, by the way.)
The answer is D. 3x^3+4x^2-11x+3
