Answer:
$49
Step-by-step explanation:
<u><em>Method 1</em></u><u><em>:</em></u>
100% - 65% = 35%
y · 100 = 35 · 140
100y = 4900
100y ÷ 100 = 4900 ÷ 100
y = 49
<u><em>Method 2</em></u><u><em>:</em></u>
y · 100 = 65 · 140
100y = 9100
100y ÷ 100 = 9100 ÷ 100
y = 91
$140 - $91 = $49
Answer:
Interpreting as: + 40 = 0
Input:
+40 = 0
Result:
False
Answer:
12
Step-by-step explanation:
2d+24+3d=84
2d+3d=60
5d=60
d=12
Answer:
Step-by-step explanation:
- <em>Let the distance is </em><em>d</em><em>, speed is </em><em>s</em>
<u>As per given we have:</u>
- d/s = 5
- 36/s + (d - 36)/(s + 3) = 5 - 1/4
<u>Substitute d with 5s and solve for s:</u>
- 36/s + (5s - 36)/(s + 3) = 19/4
- 36(s + 3) + s(5s - 36) = 19s(s + 3)/4
- 4(36s + 108 + 5s² - 36s) = 19s² + 57s
- 20s² + 432 = 19s² + 57s
- s² - 57s + 432 = 0
- s² - 9s - 48s + 432 = 0
- s(s - 9) - 48(s - 9) = 0
- (s - 9)(s - 48) = 0
- s -9 = 0 ⇒ s = 9 km/h
- s - 48 = 0 ⇒ s = 48 km/h
The original speed of grey wolf can be 9 km/h or 48 km/h
