Marisa is counting wheels on bicycles and tricycles at the park. she coounted 3 vehicles and 7 wheels. how many bicycles and how many tricycles did marisa see?

Could someone with number 1 and 2

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

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)