Question

What is the value of the expression below?

(Four-fifths + three-fifths) + 3.5 times 5
17 and StartFraction 7 over 10 EndFraction
18 and StartFraction 9 over 10 EndFraction
21 and three-fourths
24 and one-half

Answer 1

`18.9=18(9)/(10)`

Explanation:

The given expresion is

`((4)/(5)+(3)/(5))+3.5 * 5`

To solve this expression, we must apply the right hierarchy of operations. First, we must solve products and then we solve sums and differences.

`((4)/(5)+(3)/(5))+17.5`

Then, we solve fraction sums

`(4+3)/(5)+17.5=(7)/(5)+17.5`

Now, we can sum

`(7)/(5)+17.5=(7+87.5)/(5) =(94.5)/(5)=18.9`

Which is equal to

`18.9=18(9)/(10)`

Therefore, the right answer is the second hoice.