I need help on this

  B.

Step-by-step explanation:

I would write the first equation to better match the wording: three times d is 3d, and 290 less is (3d -290). That is said to be equal to t:

  t = 3d -290

If 3d is subtracted from both sides of this equation, you get an equation that matches some of the answer choices:

  t -3d = -290

The other equation is a straightforward expression of the difference in prices:

  t -d = 240

These equation match choice B.

he sells x mount because thats eqivilqant to the maz and then divided into quarters

step-by-step explanation:

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.