Question

If a point (a, 2/5) is on the graph of 10x + 5y = 20, what is the value of a?

a) 2
b) 3
c) 4
d) 5

Answer 1

Upon substituting y=2/5 into 10x + 5y = 20 and solving for x, we find that a = 1.8, which does not match any of the provided multiple choice options.

Step-by-step explanation:

If a point (a, 2/5) is on the graph of the equation 10x + 5y = 20, we can substitute y=2/5 into the equation to find the value of a:

10a + 5(2/5) = 20
10a + 2 = 20
10a = 20 - 2
10a = 18
a = 18/10
a = 1.8

However, since 1.8 is not an option in the multiple choice answers provided, it seems there might be a typo or mistake in the options. None of the given options a) 2 b) 3 c) 4 d) 5 are correct based on the calculation.