23/4 −(−1 1/2 )+(− 5/6 )−(− 3/8 )−(+4 2/3 ), first one with correct answer gets brainliest

Astudent simplified a rational expression as shown.

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?