Question

-7*3+(-5)*(-4)=-4\9*7\10*(-9\16)*(-5)=

Answer 1

-7•3+(-5)•(-4)=-21+20=-1.
-4/9•7/10•(-9/16)•(-5)=252/1 440 •5 = 0,175 • (-5) = - 0.875

Answer 2

Let's break down the given expressions step by step:

1. -7 * 3 + (-5) * (-4) First, perform the multiplications: -7 * 3 = -21 (-5) * (-4) = 20

   Now, add the results: -21 + 20 = -1

2. -4 / 9 * 7 / 10 * (-9 / 16) * (-5) First, perform the multiplications and divisions from left to right:

   -4 / 9 = -4/9 -4/9 * 7 = -28/9

   -28/9 * 1/10 = -28/90

   Now, let's simplify -9/16 * (-5): -9/16 * (-5) = (9/16) * 5 = 45/16

   So, we have: -28/90 * 45/16

   To multiply fractions, multiply the numerators together and the denominators together: (-28 * 45) / (90 * 16)

   Now, simplify the fraction: -1260 / 1440

   To simplify further, find the greatest common divisor (GCD) of 1260 and 1440, which is 180, and divide both the numerator and denominator by it: (-1260 / 180) / (1440 / 180) = -7/8

So, the result of the second expression is -7/8.