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3 years ago

What is the value of the expression below when z=7 ? 3z−3

Mathematics

2 answers:

lana66690 [7]3 years ago

4 0

Answer:

Step-by-step explanation:

First you plug in the 7

3(7)-3

which equals

21-3

this equals 19

melisa1 [442]3 years ago

3 0

Answer:

Step-by-step explanation:

We have the expression

3z-3

We know that z=7. Therefore, we can substitute 7 in for z.

z=7

3(7)-3

Now, solve according to PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction)

Multiply 3 and 7 first.

21-3

Subtract 3 from 21.

The value of 3z-3 when z=7 is 18

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<h3>QUESTION: </h3>

what is x/9 = 9/27 help plz

<h3>ANSWER AND SOLUTION: </h3>

SOLVING FOR X

Reduce first the fraction with 9

$\large \sf = \dfrac{x}{9} = \dfrac{ \cancel9}{ \cancel{27}}$

 $\large \sf = \dfrac{x}{9} = \dfrac{1}{3}$ 

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 $\large \sf = \dfrac{3x}{9} = 1$ 

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 $\large \sf = x = 3$ 

<h3>FINAL ANSWER:</h3>

$\huge \orange{ \underline{ \boxed{ \sf{x = 3}}}}$

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Step-by-step explanation:

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What is the value of the expression below when z=7 ? 3z−3 ​​

What is the value of the expression below when z=7 ? 3z−3