3 hours. I think. X represents the # of hours and they equal the same after exactly 3 hours.
Amazon would be your best option for ordering online, but you could just go to your local hardware store.
Answer:
width = 5.5 cm
Step-by-step explanation:
The perimeter (P) of a rectangle is calculated as
P = 2l + 2w ( l is the length and w the width )
Here P = 91 and l = 40 , thus
91 = 2(40) + 2w = 80 + 2w ( subtract 80 from both sides )
11 = 2w ( divide both sides by 2 )
5.5 = w
Thus width is 5.5 cm
So we need to find the length of the hypotenuse of a right triangle with sides of 3 and 4, then add that distance to 3 and 4.
By the Pythagorean Theorme, the hypotenuse squared is equal to the sum of the sides squared...
d^2=3^2+4^2
d^2=9+16
d^2=25
d=√25
d=5
So the total distance of her run is 5+4+3=12 km
