Question

If y = 1.5x + 3, and x =7.2, what is the value of y?

Answer 1

y=13.8

Explanation:

If we know x=7.2, we can substitute that into the equation, which results in the equation y=1.5*7.2+3.

We can multiply 1.5 by 7.2 to simplify the equation more.

1.5*7.2=10.8

Our equation is y=10.8+3.

To solve, we can now add 10.8+3, which is 13.8.

y=13.8

Hope this helps!

Answer 2

y = 13.8

Explanation:

Plug in 7.2 for x in the first equation.

y = 1.5x + 3

y = (1.5)(7.2) + 3

Simplify. First, multiply, then add (following PEMDAS).

y = (1.5)(7.2) + 3

y = (10.8) + 3

y = 13.8

13.8 is your answer for y.

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