mjchey
Answered

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Evaluate the expression, using the given value of the variable. z ÷ 2 – 4z + 3(z – 3) when z = 8     A. –17   B. –13   C. –7   D. –1 

Solve for x. 3 • 4 – 3 • 7 = 3(x – 7)   A. 4   B. –10   C. 6   D.         -3

                                                                                                             

Sagot :

Lilith
[tex]z : 2 - 4z + 3(z - 3)= z\cdot \frac{1}{2} - 4z + 3 z - 9= -\frac{1}{2}z -9 \\ \\ z= 8 \\ \\-\frac{1}{2}z -9 =-\frac{1}{2} \cdot 8 -9 =-4-9=-13 \\ \\ Answer : \ B. \ \ -13[/tex]



[tex]3 \cdot 4 - 3 \cdot 7 = 3(x - 7) \\ \\ 12-21 =3x-21\\ \\3x =12-21+21\\ \\3x=12 \ \ /:3\\ \\ x=4 \\ \\ Answer : \ A. \ \ 4[/tex]


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