Question

А) 19,27*(-7/16)+(-9/27)*(-7/16)в) -8,23*25,31+(-8,23)*(-15,31)​

Answer 1

Ответ:

19,27*(-7/16)+(-9/27)*(-7/16)=−8,28479166667

-8,23*25,31+(-8,23)*(-15,31)=−82,3

Answer 2

Let's calculate the two expressions:

А) $19.27 \cdot \left(-\frac{7}{16}\right) + \left(-\frac{9}{27}\right) \cdot \left(-\frac{7}{16}\right)$

First, simplify the fractions:

$-\frac{7}{16}$ can be simplified to $-\frac{7}{16}$.

$-\frac{9}{27}$ can be simplified to $-\frac{1}{3}$ because both the numerator and denominator can be divided by 9.

Now, perform the multiplications:

$19.27 \cdot \left(-\frac{7}{16}\right) = -6.72925$ (rounded to five decimal places).

$\left(-\frac{1}{3}\right) \cdot \left(-\frac{7}{16}\right) = \frac{7}{48}$.

Now, add the two results together:

$-6.72925 + \frac{7}{48} \approx -6.72925 + 0.14583 \approx -6.58342$

So, the value of expression A is approximately -6.58342.

B) $-8.23 \cdot 25.31 + (-8.23) \cdot (-15.31)$

Now, perform the multiplications:

$-8.23 \cdot 25.31 = -208.3993$ (rounded to four decimal places).

$(-8.23) \cdot (-15.31) = 125.9913$ (rounded to four decimal places).

Now, subtract the second result from the first:

$-208.3993 - 125.9913 = -334.3906$

So, the value of expression B is -334.3906.