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Y=3x-7 Work out the value of y when x=5

User Belval
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2 Answers

2 votes

Answer:

Explanation:

y=8

User Jxstanford
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7 votes

Explanation:

you know how functions work ?

the variable (or variables) in the findings expression is a placeholder for actual values.

when we have an actual value, we put that into the place of the variable and then simply calculate.

x = 5

therefore, the functional calculation is

y = 3×5 - 7 = 15 - 7 = 8

keep in mind the priorities of mathematical operations :

1. brackets

2. exponents

3. multiplications and divisions

4. additions and subtractions

therefore, we need to calculate "3×5" before we deal with the "- 7" part.

User Davi Fiamenghi
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