Elena went to a sporting goods store that was having a sale. She bought one tennis racket for $43 and tennis
balls for $15. Everything she bought was on sale for
5% and there was a tax of 8.5%.
How much did Elena pay for everything?

$59.78

Step-by-step explanation:

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

-2

7 - 9 = -2

reversed:

-2 + 9 = 7