There are 5 boys and 4 girls in a class. in how many ways can they be seated in a row of 9 chairs such that at least 3 girls are all next to each other?

We just started the introduction into circles and i have no idea how to do this.

Tyler went to the supermarket to buy food for a food pantry. he has $36, and can carry up to 20 pounds of food in his backpack. pasta costs $1 for a 1-pound package. pasta sauce costs $3 for a 1.5 pound jar. let x = the number of packages of pasta and y = the number of jars of pasta sauce. one package of pasta is the right amount to go with one jar of pasta sauce. what is the best numbers of packages of pasta and jars of pasta sauce to buy for the food pantry? how many packages of pasta? how many jars of pasta sauce? explain your reasoning.

The function below is written in vertex form or intercept form. rewrite them in standard form and show your work. y = (x+4)(x+3)