If triangles PQR and STU are similar then PQ corresponds to ST and PR corresponds to SU. Therefore, PQ/ST=PR/SU
Considering that, PQ= 7-x, ST= 13-x, PR= x²+5 and SU= x² +20
therefore, (7-x)/(13-x)= (x²+5)/(x²+20)
cross multiplying,
7x² +140-x³+20x =13x²+65-x³-5x
combining the like terms,
6x² +15x -75=0
solving for x,
x = 5/2 or -5
Easy¡¡!!!!¡
It's starts with 1000
u put the comma after the 1 1,000
10000
10,000
100000
100,000
and so on......
The Germanic tribes were governed by unwritten costumes.
Starting at 4 count to the left, there's 5 zero
so answer
<span>0.000041 = 4.1 x 10^-5</span>