Question

-0,4а*12,5*(-0,7) если а=1 1/14

Answer 1

$-0,4a*12,5*(-0.7)\\a=\frac{11}{14} \\\\-\frac{2*11}{5*14} *(-8,75)=-\frac{22}{70}*(-\frac{35}{4} )=-\frac{11}{2}*(-\frac{1}{2} )=\frac{11}{4} =2.75$

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Answer 2

To solve the expression -0.4a * 12.5 * (-0.7) with the value of a as given, let's substitute the value of a:

a = 1 1/14 = 1.0714 (rounded to four decimal places)

Now, we can proceed with the calculation:

-0.4 * 1.0714 * 12.5 * (-0.7)

Multiply the numbers:

-0.4 * 1.0714 ≈ -0.4286 -0.4286 * 12.5 ≈ -5.3572 -5.3572 * (-0.7) ≈ 3.75004 (rounded to five decimal places)

So, the value of the expression -0.4a * 12.5 * (-0.7) with a = 1 1/14 is approximately 3.75004.