Question

What is the value of y in the equation 6.4x + 2.8y = 44.4, when x = 3?

A. y = 6
B. y = 9

Answer 1

We can solve for y by plugging in x = 3 into the equation:

6.4(3) + 2.8y = 44.4
19.2 + 2.8y = 44.4
2.8y = 25.2
y = 25.2 / 2.8
y = 9

Therefore, the value of y in the given equation when x = 3 is y = 9.

So, the answer is B. y = 9.