Answer:
-36
Step-by-step explanation:
-2x^2y
-2*-3^2*-1
6^-2
-36
Answer: printer cost > Keyboard cost ($40)
Step-by-step explanation:
A) x2 + 8x + 16
= x2 + 4x + 4x + 16
= x(x+4) + 4(x+4)
= (x+4)(x+4) these are the equations of the two sides - they are the same because it is square. So the equation of one side is 1x + 4
b) The perimeter is the sides all added together, so that is
x+4+x+4+x+4+x+4 = x+x+x+x+4+4+4+4
= 4x+16 or 4(x+4)
c) When x=8 then the the perimeter is 4 lots of 8+4 inches which is 1 foot. 4 lots of 1 is 4, so the perimeter is 4 feet.
2) The difference of two squares can be written in the form x2 - y2. This can be written as (5n)2 -20, but because 20 is not a square number it can't be written as something-squared.
Answer:
diameter = 2.5 feet
Step-by-step explanation:
Circumference of a circle is given as C = πd
Circumference of the tree trunk = 7.85 ft
π = 3.14
Diameter of the tree trunk = d
Thus:
7.85 = 3.14*d
Divide both sides by 3.14
7.85/3.14 = 3.14*d/3.14
2.5 = d
d = 2.5 ft
Simplify, then see what its close to.
7/8 is close to 0 or 1, 1!