Answer:
option B
Step-by-step explanation:
let the height=x
base=x
Area=½bh
72=½x•x
72×2=x²
144=x²
x=√144=12
Answer:
4
Step-by-step explanation:
Given
x +
← substitute x = 2 + 
= 2 +
+ 
Rationalise the denominator of the fraction by multiplying the numerator/ denominator by the conjugate of the denominator.
The conjugate of 2 +
is 2 -
, thus
= 2 +
+ 
= 2 +
+ 
= 2 +
+ 2 - 
= 4
B. False.
The net of a cube is made up of 6 squares and not 5 squares.
From what i think i think it should be
Answer:
2a + 7
Step-by-step explanation:
2a + 6 + 1 ← collect like terms
= 2a + (6 + 1)
= 2a + 7