Question

Which equation could you use to solve for x in the proportion 5

Answer 1

Complete Question

Which equation could you use to solve for x in the proportion StartFraction 4 over 5 EndFraction = StartFraction 9 over x EndFraction?

• 4 x = 14
• 4 x = 45
• 5 x = 13
• 5 x = 36

Answer:

(B) 4x = 45

Step-by-step explanation:

The given proportion is:

$\dfrac{4}{5}=\dfrac{9}{x}$

To find an equivalent expression, let us cross multiply:

4*x=5*9

This gives:

4x=45

The correct option is B.