3 years ago

| What is the square root of -16?

Mathematics

1 answer:

Travka [436]3 years ago

4 0

Answer:

$4i$

Step-by-step explanation:

<u>Step 1: Find the answer</u>

<u /> $\sqrt{-16}$

$\sqrt{4^2 * i^2}$

$4i$

Answer: $4i$

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IRISSAK [1]

Answer:

80 hours

Step-by-step explanation:

let d represent doug, let l represent laura

first, set up a system of equations representing the problem:

since doug spent 10 less than twice the hours laura did, and we know that the total amount of hours they spent together is 230:

l=2d+10

d+l=230

then solve:

*first i rearranged the equations so i can solve this system of equations using elimination method*

l-2d=10

l+d=230

*subtract*

3d=240

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so, doug spent 80 hours in the lab

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Answer:

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Step-by-step explanation:

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