5. Mitchell works in a lab. He plans to
mix a 35% solution of acid with an
80% solution to make 70 mL of a 50%
solution. Let x represent the number
of millilitres of 35% solution. Use the
equation 0.35x + 0.8(70 – x) = 0.5(70)
to find the volume of each type of acid
used in the mixture.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Joel wants to buy a new tablet computer fram a store having a 20% off sale on all tablets. the tablet he wants has an original cost of $190. he also wants to make sure he has enough money to pay the 5% sales tax. part one joel uses the incorect expression 0.95(190)(0.8) to calculate that the tablet will cost him a total of $144.40. describe his error and write the correct expression part two how much will joel pay for the tablet show your work if you answer this question correctly you will receive a prize of 99 points good luck

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.