Answer:
Not sure but :
Y=15/7
X=13/5
Z=26/7
I will check them later and tell you if they are right or not .
Step-by-step explanation:
y power 2 : 31 × 8 = 248
Rad 248 = 15/7
x power 2 : 23 × 8 = 184
Rad 184 = 13/5
31 power 2 : (15/7) power 2 + z power 2
961 = 246/49 + z powe 2
z power 2 = 714/51
rad 714/51 = 26/7
z = 26/7
Answer:
Step-by-step explanation:
The two angles must add to 180
(4x-2)+(3x+14)=180
7x+12=180
7x=168
x=24
Answer:
20
Step-by-step explanation:
2×10=20
Or...
10+10=20
Answer: 52.94
Step-by-step explanation:
Length of train A = 480m
Tunnel length = 1320m
Time taken to cross tunnel = 2 mins = 120sec
Length of train B = 420m
Train B is slower than train A
Difference between their speed = 18km/hr
18km/hr = (18×1000)/3600 = 5m/s
Speed of train A :
Speed = distance / time
Speed = 1320 / 120 = 11m/s
Therefore, speed of train B :
(11 - 5)m/s = 6m/s
Relative speed of the two trains is therefore;
(Speed of A + speed of B)
Note : they are moving in opposite direction
( 11 + 6)m/s = 17m/s
Therefore time taken to cross each other :
(Sum of the length of both trains / relative speed of the trains)
Time taken = (480m + 420m) / (17m/s)
Time taken = 900m / 17m/s
Time taken = 52.94s
Answer:
$174.72
Step-by-step explanation:
105.88+43.50+36.61+92.78-38.19-65.86=174.72
