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

y = 13.8

Step-by-step 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.

~

y=13.8

Step-by-step 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!

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)