The total weight of a box, 20 plates and 30 cups is 4.8kg. The total weight of the box, 40 plates and 50 cups is 8.4kg. What is the total weight of the box, 10 plates and 20 cups?

Landon wrote that 3−2.6=4. which statement about his answer is true?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Rose and andrew are financing $128,000 to purchase a condominium. they obtained a 15-year, fixed-rate loan with a rate of 5.05%. they have been given the option of purchasing up to four points to lower their rate to 4.81%. how much will the four points cost them?