A certain chemical, the ratio of zinc to copper is 4 to 15. A jar of the chemical contains 525 grams of copper. How many grams of zinc does it contain? HURRY PLEASE

The isosceles triangle has two sides of equal length, a, that sre longer than the length of the base ,b. the equation 2a+b=15.7 can be used to find the sides length. if one of the longer sides is 6.3 centimeters what is the length of the base

Can someone 50 first drop menu 0.80 or 0.75 or 1.20 or 4.00 second drop menu 4.00 or 0.75 or 0.25 or 3.75 3rd 15,6,10, or 9 4th yes or no

Which of the following is equal to the rational expression when x is not equal to -2 or -6?