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hammer [34]
4 years ago
10

Math help asap 12,14,16,18,22 show work help asap assig 4

Mathematics
1 answer:
svetoff [14.1K]4 years ago
7 0

Answer:  see below

<u>Step-by-step explanation:</u>

12) 2(x + 4) = 8

   <u> ÷2         </u>  <u> ÷2 </u>

       x + 4  =  4

     <u>      -4 </u>    <u> -4 </u>

             \large\boxed{x=0}

14) 4w - 2(1 - w) = -38

     4w  -2 + 2w = -38

    (4w + 2w) - 2 = -38

              6w  - 2 = -38

             <u>        +2 </u>   <u>  +2 </u>

              6w        = -36

            <u> ÷6        </u>    <u>  ÷6 </u>

                      \large\boxed{w=6}

16) 10(1 - 2y) = -5(2y - 1)

    10 - 20y  = -10y + 5

   <u>      +20y  </u>   <u>+20y      </u>

    10            = 10y  + 5

   <u> -5           </u>    <u>         -5   </u>

               5 = 10y

         <u>   ÷10</u>   <u> ÷10  </u>

            \large\boxed{\dfrac{1}{2}=y}

18)\quad s=\dfrac{1}{2}gt^2\\\\\\.\qquad (2)s=(2)\dfrac{1}{2}gt^2\quad \rightarrow \quad 2s=gt^2\\\\\\.\qquad \dfrac{2s}{t^2}=\dfrac{gt^2}{t^2}\qquad \rightarrow \qquad\large\boxed{\dfrac{2s}{t^2}=g}

22)\quad V=\pi r^2h\\\\\\.\qquad \dfrac{V}{\pi r^2}=\dfrac{\pi r^2h}{\pi r^2}\qquad \rightarrow \qquad \large\boxed{\dfrac{V}{\pi r^2}=h}

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