Answer:
3 feet
Step-by-step explanation:
A cube has 6 square congruent faces, thus
area of 1 face = = 9 ft²
The area of a square = s² ← s is the length of a side, hence
s² = 9 ( take the square root of both sides )
s = = 3
Expand it so the expression would equal
5x^2+11x+2=-1
move the negative one over by adding one to both sides
5x^2+11x+3=0
then do the quadratic formula
x=-b+/- (√(b^2-4ac))/2a
where b = 11 a=5 and c=3
Option(4) is the answer because
In triangle ABC and triangle EDC
Angle ABC=angle CDE=70
And,
Angle BCA= angle DCE. ( vertically opposite angles)
=> triangle ABC is similar to triangle EDC. ( A.A congruence rule)
=> angle A= angle E. (Corresponding parts of similar triangles) or (CPST)
Hope this helps ..!!!
What am i supposed to be looking at?
Do you mean this:
√
That is a square root sign. It's the opposite of squaring a number