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Gwar [14]
2 years ago
8

2. (-9 + 12) - (-7) ​

Mathematics
2 answers:
julia-pushkina [17]2 years ago
6 0

Answer:

Step-by-step explanation:

(-9 + 12) - (-7) = 4 -(-7)

                    = 4 + 7

                   = 11

Sign of 9 is (-)

Sign of 12 is +. So subtract and the answer will have the sign of bigger number

12 - 9 = 4 and bigger number is 12 and sign of 12 is +.so +4

Aleonysh [2.5K]2 years ago
3 0

Answer:

(-9+12)=3

3-(-7)=

3+7

ans=10

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A number y increased by 5 is at least -21
gayaneshka [121]

                - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - -

\diamond\large\blue\textsf{\textbf{\underline{\underline{Given question:-}}}}

             ❖ A number y increased by 5 is at least -21.

\diamond\large\blue\textsf{\textbf{\underline{\underline{Answer and how to solve:-}}}}

          ❖ First, if you come across the word "increased" it means we

    "increase" a number, or add something to that number, like

y increased by 5 \longmapsto \sf{y+5}

Now, we are also given that this expression is at least -21, which means it can't be -21; it can be -21 or it can be greater than -21.

So we have

\longmapsto\sf{y+5\geq -21}}

<em>Solving for y</em>

<em></em>

  •   Subtract 5 on both sides:-

\longmapsto\sf{y\geq -21-5}

\longmapsto\sf{y\geq -26}

So the values of y greater than or equal to -26 will make this inequality true.

<h3>Good luck with your studies.</h3>

 \rule{300}{1}

7 0
1 year ago
Read 2 more answers
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