Answer:
a) 5 feet
why?
because it can make a 3/4/5 triangle
We can factor x^2-4x-21 to get (x+3)(x-7)
Notice how
3 plus -7 = -4
3 times -7 = -21
which helps us factor the trinomial
After you've factored it, we can cancel out a pair of (x+3) terms leaving us with the final answer of x-7
Note: the cancellation happens because (x+3)/(x+3) = 1. Divide anything (except 0) over itself and you'll get 1. A simpler example of this is 5/5 = 1.
Answer:
they will be both 30°.
Step-by-step explanation:
in an isosceles triangle measure of two angles are same
if one angle of an isosceles triangle is 120°
and the other two angles are equal then
take the equal angles be x
so,
- x + x + 120° = 180°
- 2x = 180° - 120°
- x = 60° / 2
- x = 30°
Answer:
496
Step-by-step explanation:
a+99d
1+ 99 (5)
1+ 495