Respuesta :

tonb

Answer:

-3.5

Step-by-step explanation:

You can do this without a calculator.

Since √16 = 4 and √25 = 5, you can be sure that √20 will be between 4 and 5. So your answer will be between -8+4 and -8+5.

This is between -4 and -3, and there is only one answer listed, answer C.

BTW, the unrounded answer is: -3.527864045000420607181652662537447529118763280776948551458205509...

-8+√20=-3.5

We need to find value of -8+√20 and we have to round it to nearest tenth

What is a surd?

An expression with square root , cube root or other root symbol

-8+√20=-8+√(4*5)

=-8+2√5

=-8+2(2.23606)

=-8+4.47212

=-3.527

Therefore the answer is -3.5

To learn more about surds click here : https://brainly.com/question/24436961

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