Answer:
A
Step-by-step explanation:
Because if you simplify you get that
12 cm high is about 4.7 inches high
Answer:
75
Step-by-step explanation:
(71+89+100+x)/3=83.75
(83.75*4)
335-100-89-71=75
Rearrange to: x^2 + 18x - 25 = 0
Then factorise (I like to do it by completing the square):
(x + 9)^2 -81 -25 = 0
(x + 9)^2 = 106
x + 9 = sqrt(106)
The sol'ns are:
x = -9 + and - sqrt(106)