Answer:
-2 , 4
Step-by-step explanation:
(x - 1)² – 9=0
(add nine to both sides)
(x - 1)² = 9
(square root both sides)
x - 1 = (positive or negative) 3
(add 1)
x = 4 or -2
Number 7 on your picture is: 4 over 1 or 4/1
Number 8 on your picture is: 4 over 3 or 4/3
Answer:
7.25
Step-by-step explanation:
well I think so at least
The 3 inside angles of a triangle equal 180.
Add the 3 angles together to equal 180:
X + (5x-20) + 4x = 180
Simplify the left side by adding like terms:
10x-20 = 180
Add 20 to each side:
10x = 200
Divide both sides by 10:
x = 20
Angle A = x = 20
Angle B = 4X = 4(20) = 80
Angle C = 5x-20 = 5(20) -20 = 100-20 = 80
Figure B is the answer!
The formula for the Pythagorean theorem is
A^2+B^2=C^2
In figure B the units are squared. Making it your answer.
-Seth
