An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 180 grams of an alloy containing 24% copper with 140 grams of an alloy containing 84% copper. (dont do any rounding) a)how many grams of copper are in the resulting mixture
b)what percentage of the remaining mixture is copper?

Factor the following expression. 27y3 – 343 a. (3y + 7)(9y2 + 2ly + 49) b. (3y – 7)(9y2 + 2ly + 49) c. (3y – 7)(932 – 217 + 49) d. (3y + 7)(92 – 2ly + 49)

Answer! if you don’t mind, can you explain

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.