mrs starts class paid $5.60 for 4/5 yd of lace for an art project. later the class decided to buy another 7 3/4 yd of the same lace to make costumes for the school musical. how much money do they need for their second purchase

What is the rotational symmetry of a wheel

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is