Ineed solving 't give me answers walk me through it

Do the same process for each of the 3 

you have miles per how many minutes and you need miles per hour
you know 60 minutes make 1 hour  convert the minutes to hours 
this will gives you miles per equivalent hour
you need miles per 1 hour 

Here is number 1  
1) 5 miles in 20 minutes 
    5 miles in (20/60) hr  = 5 miles in 1/3 hr 
to get 1 hr multiply by 3 
equation so keep the balance 
5 * 3 = 15 
rate = 15 miles per hour.

same process for the others

Intersecting secant-tangent theorem states that if a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment.so to break it down: 1. pq acts as the tangent and ps as the secant with an intersection at p.sr = 21rp = 3x + 3pq = 4x + 4following to equation: tangent squared = the two segments multiplied by each otherso (4x + 4) ^ 2 = (3x + 3) • (21) simplifies to 16x^2 - 31x - 47 = 0 or (16x - 47)(x + 1) x = -1 or x = 47/162. pq acts as the tangent and ps as the secant with an intersection at p (again! )sr = 16rp = xpq = 15(15) ^ 2 = 16 • x225 = 16xx = 225/163. the interesting chords are proportional to each other so a ratio is possible to set up: ap dp 10 3 + x = = —— = pc pb 8 xcross multiple to get 10x = (3 + x)(8)x = 12