In a certain chemical, the ratio of zinc to copper is 3 to 13. A jar of the chemical contains 650 grams of copper. How many grams of zinc does it contain?
It contains
grams of zinc.

 150 grams of zinc

Work Shown:

zinc/copper = 3/13

z/650 = 3/13

13z = 650*3

13z = 1950

z = 1950/13

z = 150

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

answer: 193

explanation:

200-7 = 193