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natta225 [31]
3 years ago
12

Nadya solves the equation 4x-4=20. Her work is shown below.

Mathematics
2 answers:
Rama09 [41]3 years ago
6 0
4x-4=20
   +4 +4
4x=24
divide both sides by 4 
x=6
Stells [14]3 years ago
3 0
Step 2 she should add 4 not subtract
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I hope this helps you



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A painter charges an initial fee of $50 and $30 for each hour of labor. Write a linear function to determine the total cost. How
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The initial fee of $50 is essentially the y intercept because this is the value when x = 0 (x is the number of labor-hours). So b = 50.

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So we plug m = 30 and b = 50 into the y = mx+b formula to get y = 30x+50

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The linear function for the cost is f(x) = 30x+50

Note: Some books may use other letters (instead of x and f(x)), but the idea is still the same

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3 years ago
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