An average person's heart beats about 103,680 times a day. write and solve an equation to find about how many times does the average person heart beats in one minute.

103,680 ÷ 1,440 = 72
An average persons heart beats at about 72 times per minute.

(There are 1,440 minutes in a day.)

To find the answer is,
How many seconds are there in a minute? {60}sec.
Then you take "103,680 and divide by 60, that's the minute(s), that I put in seconds, and we are trying to find out. 
(103,680÷60)=1728 and if you want to make sure this is correct just multiply (1738*60) you'll get the answer of 103,680. 
Therefore, 1728 is the answer. Hoped this helped! xD

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