GIVING BRAINLIEST How many solutions exist for the given equation?

1/2(x+12)=4x-1 (1/2 is one half)

zero

one

two

infinitely many

Asilkworm winds its cocoon out of one long silk fiber. to make silk thread, 3 to 10 of these silk fibers are unwound from their cocoons and combined into aa single thread with a typical length of 300 yards. choose a reasonable number of silk fibers in a thread write an equation to find the total length of the silk fibersused in 300 yards of the thread

Can someone me i’m confused. will give brainliest and a whole bunch of points

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?