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azamat
3 years ago
12

-1 (5)+(-1)(-7)simplify plz​

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
6 0
The equation simplifies to 2.

How to solve-

PEMDAS shows that you will start off by multiplying. A negative times a positive equals a negative and a negative times a negative equals a positive.

-1 • 5= -5
and
-1 • -7 = 7


-5+7= 2
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3. Solve the inequality –2(z + 5) + 20 > 6.
12345 [234]

\boxed{-2\left(z+5\right)+20>6\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:z

<em><u>Solution:</u></em>

<em><u>Given inequality is:</u></em>

-2(z+5)+20>6

We have to solve the given inequality

-2\left(z+5\right)+20>6\\\\\mathrm{Subtract\:}20\mathrm{\:from\:both\:sides}\\\\-2\left(z+5\right)+20-20>6-20\\\\\mathrm{Simplify}\\\\-2\left(z+5\right)>-14

Multiply\ both\ sides\ by\ -1\ \left(reverse\:the\:inequality\right)

Whenever we multiply or divide an inequality by a negative number, we must flip the inequality sign

\left(-2\left(z+5\right)\right)\left(-1\right)

<em><u>Thus the solution to inequality is:</u></em>

-2\left(z+5\right)+20>6\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:z

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3 years ago
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</span>
8 0
3 years ago
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