X+3+2x=x+3 what is x equal to ? Thank you

What other information do you need to prove triangle dac=bca by asa

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Jessa bought a yoyo from a company that claims that, with each retraction, the string rolls up by 60% of the original length. she sets up a tape measure and throws the yoyo 3 times. her data are charted below. throw length of string (feet) 1 3 2 1.8 3 1.08 jessa wants to find the sum of the length of string after 10 throws. what is the sum of the lengths, rounded to the nearest hundredth?