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Write an equation and solve. Round to the nearest hundredth where necessary. 19 is what percent of 40?
a. 2.1%
b. 47.5%
c. 52.3%
d. 40.4%
User: Solve the proportion
5/x = 4/8
A. 2
B. 6
C. 8
D. 10

Respuesta :

the first one is B. idk the second

Step-by-step explanation:

(a) Let x% of 40 = 19

Therefore, [tex]\frac{x}{100} \times 40 = 19[/tex]

                 [tex]\frac{4x}{10} = 19[/tex]

                     x = [tex]\frac{190}{4}[/tex]

                     x = 47.5

Thus, 47.5% of 40 = 19.


(b) It is given that [tex]\frac{5}{x} = \frac{4}{8}[/tex]

                             [tex]x = \frac{5 \times 8}{4}[/tex]

                                    x = 10

Thus, we can conclude that the value of x = 10.


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