Two sides of a triangle have the same length. the third side measures 4 m less than twice the common length. the perimeter of the triangle is 20 m. what are the lengths of the three sides?

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Can someone me and plz do the problem

Here is my question! jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?