A. 2 1/4=8/4+1/4=9/4
b. 3 3/5=15/5+3/5=18/5
c. 4 9/12=48/12+9/12=57/12
d. 2 5/7=14/7+5/7=19/7
e. 3 1/9=27/9+3/9=28/9
f. 10 11/12=120/12+11/12=131/12
The earth rotates on an axis , just like when u see the clouds “moving” it’s not the clouds the earth is rotating on its axis. This causes Day and Night. Yes, in your perspective the UFO will be moving although if u were inside the UFO it would appear that the East is moving when it is.
Answer:
Step-by-step explanation:
Let the speed of Masha = s, speed of Dasha = d
- Distance = 20 km
- Time difference = 20 min = 1/3 hr
- Speed difference = 2 km/h
<u>As per above info we get following equations:</u>
- s = d + 2
- 20/s + 1/3 = 20/d
<u>Substitute s and solve for d:</u>
<u>Get rid of fraction by multiplying all terms by 3d(d + 2):</u>
- 60d + d(d + 2) = 60(d + 2)
- 60d + d² + 2d = 60d + 120
- d² + 2d = 120
- d² + 2d + 1 = 121
- (d + 1)² = 11²
- d + 1 = 11
- d = 10
<u>Find s:</u>
<u>The answer is</u>
- Masha's speed 12 km/h and Dasha's speed 10 km/h
Answer
I don’t know but I’m struggling
Answer:
The first number = 8
The second number = 12
Step-by-step explanation:
let the given first number = x
And the given second number = y
Now, according to the question:
x = y - 4
2 y = 5x - 16
Now substitute the value of x in (2)
2 y = 5x - 16 ⇒ 2 y = 5(y -4) - 16
or, 2y = 5 y - 20 - 16
or, - 3 y = - 36
⇒ y = 36/3 = 12
So , the second number y = 12
and x = 12 - 4 = 12 - 4 = 8
Hence, the first number = 8
and the second number y = 12