How do you evaluate $7 (- 4) + 9 (- 5)$ $7( - 4) + 9( - 5)$ ?

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Answer 1 · 2018-03-10T08:36:03

$- 73$ $-73$

First, get the multiple values of the terms (solve the two terms beside the mathematical operation)

$7 (- 4) = - 28$ $7(-4) = -28$

$9 (- 5) = - 45$ $9(-5) = -45$

Then add these two terms since both are negative values. and add the $-$ $-$ sign in front of the answer because both the terms are negative.

$- 28 + (- 45) = - 73$ $-28 + (-45) = -73$

$(-) + (-) =$ $(-) + (-) =$ add and put $(-)$ $(-)$ infront of the answer.
$(-) + (+) =$ $(-) + (+) =$ subtract and put the sign of the highest term.

For example:

$(- 4) + 6 = 2$ $(-4) + 6 = 2$

(here $6 > 4$ $6 > 4$ . Since $6$ $6$ has a $+$ $+$ sign, we put a $+$ $+$ sign for the answer)

$(- 6) + 4 = - 2$ $(-6) + 4 = -2$

(here $6 > 4$ $6 > 4$ . Since $6$ $6$ has a $-$ $-$ sign, we put a $-$ $-$ sign for the answer)

How do you evaluate 7(−4)+9(−5)7( - 4) + 9( - 5)?