Jose and alexia were lab partners in science class. they needed to weigh three samples of rock to the nearest thousandth. the first sample weighed 3.346 grams, the second weighed 2.479 grams, and the third weighed 9.240 grams. how much did the samples weigh altogether?

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Add the fractions and simplify 1/2+ 1/3

Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?