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2 years ago

Simplify (8 + 7i) + (2 –i)

Mathematics

1 answer:

inna [77]2 years ago

8 0

Simplify (8 + 7i) + (2 –i)
answer:10+6i

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Evaluate each of the following to three significant figures, and express each answer in SI units using an appropriate prefix: (a

Softa [21]

Answer:

a). $4.86\times 10^{-15}$ m

b). $4.21\times 10^{-2}$ m³

c). $7.00\times 10^{3}$ N²

Step-by-step explanation:

In this question we have to convert each option into SI units.

a). $4.86(10^{-6})^{2}$ mm

= $4.86\times (10^{-12})\times (10^{-3} )$ m

= $4.86\times 10^{-15}$ m

b). (348 mm)³

= $(348)^{3}\times (10^{-3})^{3}$ m³

= $42144192\times 10^{-9}$ m³

= $4.21\times 10^{-2}$ m³

c). $(83700)^{2}\times (10^{-3})^{2}$ N²

= $700569\times 10^{4}\times 10^{-6}$ N²

= $7.00\times 10^{9}\times 10^{-6}N^{2}$

= $7.00\times 10^{3}$ N²

7 0

2 years ago

Is anybody able to help me get number ten? (Geometry)

Nikitich [7]

Answer:

Aha..our nemesis problem. :)

The area is 129.90 ft ^2.

Step-by-step explanation:

First, use a 30-60-90 triagle to find the apothem.

$5\sqrt{3} =8.66\\8.66*5=43.30\\43.30/2=21.65\\$

That is the area of 1 triangle. There are 6 of them in a hexagon, so multiply that number by 6:

21.65*6=129.90 ft ^2

Have a great day!

6 0

3 years ago

Assume that y varies inversely with x. if y=7 when x=-2, find y when x=7

melisa1 [442]

Answer:

y=-2

Step-by-step explanation:

The formula for inverse variation is

xy =k

if y=7 when x=-2, we can substitute these numbers in to find k

(-2)(7) =k

-14 =k

The equation becomes

xy = -14

Let x =7

7y = -14

Divide each side by 7

7y/7 = -14/7

y = -2

8 0

3 years ago

What is the sum of 2 + 3i and −1+7i A 1 + 10i B 3−4i C 5 + 6i D 9 + 2i

poizon [28]

A is the correct answer

2 + 3i + (-1) + 7i
1 + 10i

6 0

3 years ago

Read 2 more answers

What is the outlier in the following data : 85,83,9,85,82,81,90

kow [346]

It is 9 because all the other numbers are in the 80s and 90s 9 is way to low.

3 0

3 years ago