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3 years ago

√2.35^2 + √-4.27^2

Mathematics

1 answer:

Ostrovityanka [42]3 years ago

8 0

Square roots and squares cancel eachother. therefore the problem is simply:
2.35 + -4.27= -1.92

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Which relations are functions?

rewona [7]

Answer:

{(2,4), (-1, 7), (3,0), (5,4)}

{(-6, 1), (0, 1), (2, 1), (3, 1)}

{(-3, -3), (-1, 6), (4, 5), (5, 4)}

Step-by-step explanation:

For a relation to be a function, the same x-value can't have multiple y-values.

For this reason, this relation is not a function:

{(-4,0), (-4,8), (-1, 3), (2,9)}

And these are functions:

{(2,4), (-1, 7), (3,0), (5,4)}

{(-6, 1), (0, 1), (2, 1), (3, 1)}

{(-3, -3), (-1, 6), (4, 5), (5, 4)}

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3 years ago

You invest $9,900 and earn a return of 14% each year

kow [346]

Answer:

14% is 1,386 dollars you would earn in a year.

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3 years ago

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Find all values of k for which the function y=sin(kt) satisfies the differential equation y′′+16y=0. Separate your answers by co

VashaNatasha [74]

Answer: k = 4, k = -4 and k = 0.

Step-by-step explanation:

If we have y = sin(kt)

then:

y' = k*cos(kt)

y'' = -k^2*son(x).

then, if we have the relation:

y'' - y = 0

we can replace it by the things we derivated previously and get:

-k^2*sin(kt) + 16*sin(kt) = 0

we can divide by sin in both sides (for t ≠0 and k ≠0 because we can not divide by zero)

-k^2 + 16 = 0

the solutions are k = 4 and k = -4.

Now, we have another solution, but it is a trivial one that actually does not give any information, but for the diff equation:

-k^2*sin(kt) + 16*sin(kt) = 0

if we take k = 0, we have:

-0 + 0 = 0.

So the solutions are k = 4, k = -4 and k = 0.

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3 years ago

What is the answer to v-11=8

GREYUIT [131]

Answer

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You put a +11 under the -11 then you can move the +11 to the other side of the equal sign. Then u add them which equals 19.

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4 years ago

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True or false To find 7% of a number, multiply the number by 0.7

Delicious77 [7]

Answer:

true and it also depends on what question it is

Step-by-step explanation:

because 7% = 0.07 when doing a mathematical question it will help you a lot if you turn 7% into a decimal 0.07 and it will be more easier than doing it as a percentage.

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3 years ago