Is the correct answer -5.5 or just 5?

Question

Is the correct answer -5.5 or just 5?
Use your calculator to evaluate the following expression if x = –2.57, y = 1.55, and z = –1.98. Round your answer to the nearest tenth.

3x + y
_____
z+ 2y

Answer 1

The exact answer is -5.5 as you found, and the nearest tenth is -5.5. Frankly, I think it's a bad question: a better question would have left you a calculator answer with values to two or more decimal places.

Answer 2

- 5.5

Look, if you work it out in rough terms

... 3 times x will give you about -9. Plus y (say 2) makes it about -7.
therefore 3x + y = about -7

Then z = say -2. and 2 times y is about 3.
then -2 +3 is 1.

Then divide -7 by 1 = -7.

So the answer has to be about -7.

Therefore the answer -5.5 is correct

Answer 3

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Answer 4

the exact answer is -5.5 but if you round it to the nearest tenth it will become -6.

Answer 5

5 or 5.5

if you rounded to the whole number - it would be six

rounding to the tenth is the first number to the right of the decimal
5.5 is correctt ( If I can spel!)

Answer 6

(3(-2.57) + 1.55)/(-1.98 + 2*1.55) =
(-7.71 + 1.55)/(3.10 - 1.98) =
-6.16/1.12 =
-5.5

Answer 7

(3(-2.57)+ 1.55)/((-1.98)+2(1.55))
=(-7.71+1.55)/(-1.98+3.10)
=(-6.16)/(1.12)
= -5.5

Answer 8

-5.5