donatello paid $57 for a set of speakers on sale for $70 less than one-quarter of the original price. write out the equation for this problem and solve for the original price.​

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

Standard deviation of 19,29,21,22,23

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.