Bonjour svp aidez moi merci d'avance

The chart below shows the distribution of weeds in yard

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?