Respuesta :
Answer:
(b) 4 x = 4 5 is the needed expression to solve for the value of x.
Step-by-step explanation:
Here, the given proportion is simplified as:
[tex]\frac{4}{5} = \frac{9}{x}[/tex]
Now, to simplify any proportion of the form [tex]\frac{a}{b} = \frac{c}{d}[/tex] the simplest way is CROSS MULTIPLICATION.
So, cross multiplying [tex]\frac{a}{b} = \frac{c}{d} \implies ad = bc[/tex]
Similarly cross multiplying [tex]\frac{4}{5} = \frac{9}{x}[/tex], we get:
4 (x) = (9) (5)
or, 4 x = 45
Hence, 4 x = 45 is the needed expression to solve for the value of x.
Answer:
4x=45
Step-by-step explanation:
4/5=9/x, so first you would multiply 5×9 (because cross products are always equal) and you would get 45. Since 4x has to also equal 45, the answer is 4x=45.
Hope this helps (P.S. I got it right on the test)!
