180 miles in 3 hours, what's the unit rate?

Flashback to semester a. are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr? show your work.

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer