Is x =4? if so
4^3-(3+4)^2
=64-(7)^2
=64-49
=15
Answer: it contains 200 grams of zinc.
Step-by-step explanation:
Ratio of zinc to copper is 4 to 15 = 4;15
Total ratio = 4+15= 19
We first find amount of both zinc and copper( the whole chemical) which is equal to
ratio of copper / total ratio x (the entire chemical--total grams of zinc and copper) =amount of copper
15/19 x X = 750
X= 750 X 19 / 15= 950 grams
To find amount of zinc in the chemical = ratio of zinc / total ratio x total amount of chemical
=4/19 x 950
=200 grams
-------------------------36.06
Answer:
y=1/4x-2
Step-by-step explanation:
y=4x+8
INV
x=4y+8
(x-8)/4=y
y=1/4x-2