In a certain chemical, the ratio of zinc to copper is 3 to 16. A jar of the chemical contains 624 grams of copper. How many grams of zinc does it contain?
It contains
nothing grams of zinc.

117

Step-by-step explanation:

so first we just have to set up an equation

3/16=x/624

we an simplify this to

3/4=x/156

this means that

4x=468

we can now divide both sides by 4

so x=117

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

g = (2, 2)

step-by-step explanation:

given the ratio is 1 : 1 then f is the midpoint of eg

let the coordinates of g = (x, y)

using the midpoint formula

(0 + x) = 1 ( multiply both sides by 2 )

0 + x = 2 ⇒ x = 2

similarly

(4 + y) = 3 ( multiply both sides by 2 )

4 + y = 6 ( subtract 4 from both sides )

y = 2

coordinates of g = (2, 2)