Answer:
108 km/hr
Step-by-step explanation:
45 minutes = 3/4 hours
1) Distance = speed × time
= 60 × 3/4
= 45 km
2) 20 minutes = 1/3 hours. So, 3/4 - 1/3 = 5/12 hours.
speed = distance / time
= 45 / 5/12
= 108 km/hr
Answer:
C, D, E
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given:
Distribute the parenthesis
Subtract both sides by 4
Divide both sides by 2 to get alone
Hope this is helpful
c ≈ 16.7 ( to 1 dec. place ) → d
since triangle ABC is right use the cosine ratio to find c
cos33° = =
multiply both sides by c
c × cos33° = 14 ( divide both sides by cos33° )
x = ≈ 16.7 ( to 1 dec. place )
<span>2x^2 - 8x - 90
= 2 (x^2 - 4x - 45)
= 2 (x - 9)(x + 5)
so
x - 9 = 0; x = 9
x + 5 = 0; x = -5
solutions -5 and 9
answer
</span><span>B)-5</span>
<span>D)9</span>