Abiker’s speed is 1.5 times faster than a walker’s speed. they start moving simultaneously in the same direction from the same point and, after 1.5 hours, the distance between them is 12.5 miles. what are their speeds?

Answer : The speed of walker and biker is, 16.67 mile/hr and 25.005 mile/hr respectively.

Step-by-step explanation :

Let the walker’s speed be, 'x'

So, the biker’s speed will be, 1.5x

Given:

Time = 1.5 hours

Distance between walker and biker = 12.5 miles

As we know that,

The distance covered by walker =

The distance covered by biker =

Distance between walker and biker = 12.5 miles

So,

Thus, the walker’s speed = x = 16.67 mile/hr

The biker's speed = 1.5x = 1.5(16.67) mile/hr = 25.005 mile/hr

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

the answer is 31.27mph