Can someone plz answer this? I need an answer to at least two questions! Plz, look at the pic to see what you have to answer! Thx!

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Ftara spends $219 a month for her car payment and she makes $3,200 a month, what percent of her monthly income is spent on her car payment?

Aplane intersects a pris paralel to the base of the prism. the cross section is a polygon wth eight sides. how many sides does the base of the prism have? a. 10 b. 8 c. 7 d. 9