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harkovskaia [24]
2 years ago
5

Please Help 6-10 or just one of them

Mathematics
1 answer:
Free_Kalibri [48]2 years ago
5 0

Answer:

6) 20

7) I think is 2.5 (im not sure)

8) 7

Step-by-step explanation:

6) (5x+9)+(3x+11)=180

    8x+20=180

         -20   -20

          8x=160

Divide 8 on each side

            x=20

7) (17x+1)=(20x-14)

   17x+15 =20x

   +17         +17

     15 = 37x

divide 15 on each side

X=2.5

8) (3x+3)+(10-4)=90

    (3x)+(10x-1)

      13x-`1=90

            +1   +1

         13x=91

Divide 13 on each side

x=7

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\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
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%  (a,b)
A&({{ x}}\quad ,&{{ y}})\quad 
%  (c,d)
C&({{ -5}}\quad ,&{{ 4}})
\end{array}\qquad
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\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)

\bf \left( \cfrac{-5+x}{2}~,~\cfrac{4+y}{2} \right)=\stackrel{B}{(-2,5)}\implies 
\begin{cases}
\cfrac{-5+x}{2}=-2\\\\
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\boxed{x=1}\\
----------\\
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3 0
2 years ago
Solve for z. 8z − 4 = 7z
aleksandr82 [10.1K]

8z − 4 = 7z

move 8z to the other side

sign changes from +8z to -8z

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5 0
3 years ago
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What is the difference between these fractions?<br><br> +3/4−(+7/8)
Ket [755]

Answer:

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Step-by-step explanation:

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2 years ago
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anastassius [24]

Answer:

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Step-by-step explanation:

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sorry I'm not good at explaining

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2 years ago
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Which decimal is larger 36.36 or 36.63 PLEASE HELP!!
Alexeev081 [22]
36.36 is thirty-six and thirty-six hundredths.
36.63 is thirty-six and sixty-three hundredths.

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The decimal parts are 0.63 and 0.36.
Sixty-three hundredths is greater than thirty-six hundredths.
Since 0.63 is greater than 0.36, 36.63 is greater.
7 0
3 years ago
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