B. 4.8 but i think it should be 5.3 not 4.8 but the most logic is b
Answer:
22.5 cm
Step-by-step explanation:
9 inches=9×2.5 cm =22.5 cm
3.7
I hope this helps! Negatives cancel out negatives
Answer:
1. yes
2. no
Step-by-step explanation:
1. Yes.
since all our sides are the same, it doesn't matter which is the shorter or longer
a+a > 2a for all lengths a>0, since lengths of triangles can only be positive and greater than 0
equilateral triangles exist for a reason
2. no
a triangle will have exactly 180 degrees, no less, no more
30+70+110 >180
(a) Use u = -∇z(2, 5)/||∇f(2, 5)||
= -<-4x, -4y>/||<-4x, -4y>|| {at (2, 5)} <span>
= <8, 20>/√((-8)^2 + (-20)^2)
<span>= <2, 5>/√29
(b) Du f(2, 5) = ∇z(2, 5) · u </span><span>
= ∇z(2, 5) · -∇z(2, 5)/||∇f(2, 5)|| </span><span>
= -||∇z(2, 5)||^2 / ||∇f(2, 5)|| </span><span>
= -||∇z(2, 5)|| </span><span>
<span>= -4√29</span></span></span>
