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:
Option C. is correct choice.
Step-by-step explanation:
Regards: Umer
Answer:
z=21, x=1, y=9
Step-by-step explanation:
3z=63 (a property of a kite)
z= 21
3x-1=2x (another property of a kite)
x=1
y+4=13 (another property of a kite)
y=9
Be sure to know your properties!
Answer:
the discount amount is $9.99
the sale price for the video game is $40
The answer is C.
Best of luck to you my dear.
Step-by-step explanation:
49.95x.2= 9.99
49.99-9.99= 40
Answer:
23/4
Step-by-step explanation:
The equation becomes 8x-7*2= 32
8x-14=32
+14 on both sides
8x = 46
divide by 8
x = 46/8
then simplify
x = 23/4
