324.8 rounded to the nearest ten

Which equations have one solution? I NEED IT FAST A) 1/3x+3=26+6/18x-23 B) x+3+3x=-3+4x+6 C) 2 (1/5+1/4x-2x=x-1 D) 4.3x+2.5-2.2x+2.2-2.1x=0 E) 2 (4x+3+2x=5 (2x+3) F) 2/5x+10+3/5x=2x+5

You have a box that is a good size for your DVD collection. Two rows of DVD's will fit in the box. The box is 10 inches. Each DVD is 5/8 inches wide. How many DVD's will fit in the box?

How many inches equals one half of a mile

Solve x^2-8x=3 by completing the square.

Two drivers are 420 miles away from each other when they started moving towards each other. They meet after 4 hours. What is the speed of the first car, if the second car's speed is 45 mph?

Using the formula r=d/t, where d is the didtance in miles, r is the rate, and t is the time in hours, at which rate must you travel to cover 185 miles in 2.5 hours

Several students and adult chaperones are going on a field trip to the theater. Each student ticket cost $2 and each adult ticket cost $4. The total cost for the trip is $144. There are 4 times as many students as adults going on the trip.

15 divided by 6 2/3=

Preston is making cookies. He has fraction 4 over 5 cup of flour in a bag. He then used two fraction 1 over 10 cup scoops of flour for his recipe.

Patricia purchased x meters of fencing. She originally intended to use all of the fencing to enclose a square region, but later decided to use all of the fencing to enclose a rectangular region with length y meters greater than its width.