9514 1404 393
Answer:
41.4
Step-by-step explanation:
The Law of Cosines tells you ...
a² = b² +c² -2bc·cos(A)
where sides a, b, c are opposite angles A, B, C, respectively. Filling in the given numbers, you have ...
a² = 30² +26² -2·30·26·cos(95°)
a² ≈ 1711.96
a ≈ √1711.96 ≈ 41.38
The length of BC is about 41.4 units.
Answer:
x = 15
m∠1 = 45°
Step-by-step explanation:
2x + 15 + 135 = 180
2x = 180 - 15 - 135
2x = 30
x = 30/2
x = 15
180 - 135 = 45°
Answer:
4.1 sec
Step-by-step explanation:
-9.8t^2 +38.2t + 6.5 = 0
t = 
= 
= 
= 
= 
= 4.1
All of a triangles angles add up to 180, this is known as the triangle sum conjecture.
an Iscoceles triangle is a triangle that has two or more congruent sides.
if a triangle is Iscoceles then th e two angles that are made by the congruent sides and base are also congruent.
if you know that one of the angles is 20 that. The sum of the other two angles must be 160.
That means that answer 2 and 4 are incorrect.
Answers 1 and 3 both have a total angle sum of 160. since this is true the correct answer depends on where the known angle is. If it is the angle that is formed by the two congruent sides than the answer is number one. but if it is formed by one of the congruent sides and the base then the answer is number 3.
For this case we have by definition, that the electrical power is given by:
Where:
P: It's the power
I: It's the current
R: It's the resistance
Clearing the current:
We choose the positive value:
ANswer:
Option A
