Answer: 93 grams Zinc
Step-by-step explanation:
3 Zinc : 13 Copper
x 31 x 31
93 Zinc, 403 Copper
or
set up a proportion, cross multiply, and solve for the variable:
3(403) = 13(x)
3(31) = x
93 = x
C. 8
You substitute 8 into x, which makes the equation 5(8-5) = 15. 8-5 is 3, and 5 x 3 = 15.
The answer is up three and up four
11. 4,890 and commutative
12.2,592 and associative
not 100 percent sure about my answer sorry
