Question

2.80:40=х:3а) 1,5. б)6. в. г)19​

Answer 1

$\frac{80}{40} =\frac{x}{3};\\\\x=\frac{80*3}{40};\\\\x=6$

Answer 2

To solve the proportion 2.80:40=х:3а, we can set up a cross-multiplication equation:

(2.80 * 3а) = (40 * х)

Now, let's solve for х:

2.80 * 3а = 40 * х

8.40а = 40х

Now, divide both sides by 40:

х = 8.40а / 40

х = 0.21а

So, the solution is х = 0.21а.

Now, let's check the given options for the value of "а":

a) 1.5: х = 0.21 * 1.5 = 0.315 b) 6: х = 0.21 * 6 = 1.26 c) 19: х = 0.21 * 19 = 3.99

None of the options (a, b, or c) match the calculated value of х. Double-check the original equation or calculations if needed.