Answer:
Cycling Speed is 15km/hr
Step-by-step explanation:
Let the cycling speed of Peter be xkm/hr
His walking speed is (x-10km/hr)
Distance cycling is 2/3 x 30 = 20km
Distance walking 1/3 x 30 = 10km
Time taken in cycling = distance/ speed
Time = 20/x
This gives 20/x km/hr
Time walking is 10 / (x-10)
= 10/x-10) hrs
Total time = (20/x + 10/x+10)
Therefore 10/x+10/x-10 = 10/3
60(x-10)+30(x)=10x(x-10)
10x² - 190x+600=0
x²-19+60=0
x=<u>19±√361-240</u>
2
x=15 0r x =4
His cycling speed is 4
Answer:
-3(x - 738)
Step-by-step explanation:
-3x+2214
-3x+3 . 738
-3(x-738)
Answer:
(5h-4t)(5h+4t)
Step-by-step explanation:
25h² - 16t²
adding and subtracting 20ht from it (√25 and √16 = 5x4 = 20):
25h² + 20ht - 20ht -16t²
factor:
(5h-4t)(5h+4t)
Let the number be x.
4x - 8 =12
4x =12 +8 ( you bring the eight over to the 12, it becomes positive )
4x = 20
x = 20÷4
x = 5
Answer:
28< 6
Step-by-step explanation:
34 < 6 + d
Subtract 6 from each side
34-6 < 6 + d-6
28< 6
