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3 years ago

PLEASE HELP THIS A QUIZ DUE AT 9:00!

Mathematics

2 answers:

Svetllana [295]3 years ago

6 0

Answer:

mmmm 7$ per week

Step-by-step explanation:

just divide 28/4=7

leva [86]3 years ago

5 0

Answer:

28/4= $7

hope this helps

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Lf a bus travels 6 km in 10 minutes, what distance does it travel in 1second<br>

Nikitich [7]

Answer:

Step-by-step explanation:

$6\: km\: in \:10\: minutes\\First\:lets\:convert\:10\:min\:to\:seconds\\\\1\:minute \:\:\:\:=60\:seconds\\\\10\:minutes = x \:seconds\\\\x = 60\times 10\\x = 600seconds\\\\6km\: = 600\:seconds\\x\:km = 1 \:second\\\\Cross\:Multiply\\600x =6\\\frac{600x}{600} =\frac{6}{600} \\\\x = 1/100\\\\ =0.01km$

5 0

4 years ago

WHAT IS THE PERIMETER OF THE TRIANGLE <br><br> GET THIS RIGHT AND YOU GET 100 POINTS

xz_007 [3.2K]

Answer:

Step-by-step explanation:

SO im guessing if its the full graph one box counts 1.

So the top side counts 8

The left one is 15

The perimeter means adding all the sides together.

We already have 2. But finding the hypotenuse would not be easy from graph so we will use Pythagorean theorem.

a^2+b^2=c^2

8^2+15^2 = c^2

64+225 = c^2

289 = c^2

c = 17

so the perimeter is 8+15+17 = 40

4 0

3 years ago

(7 + 7i)(2 − 2i)

Ostrovityanka [42]

The complex number -7i into trigonometric form is 7 (cos (90) + sin (90) i) and 3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)

<h3>What is a complex number?</h3>

It is defined as the number which can be written as x+iy where x is the real number or real part of the complex number and y is the imaginary part of the complex number and i is the iota which is nothing but a square root of -1.

We have a complex number shown in the picture:

-7i(3 + 3i)

= -7i

In trigonometric form:

z = 7 (cos (90) + sin (90) i)

= 3 + 3i

z = 4.2426 (cos (45) + sin (45) i)

$\rm 7\:\left(cos\:\left(90\right)\:+\:sin\:\left(90\right)\:i\right)4.2426\:\left(cos\:\left(45\right)\:+\:sin\:\left(45\right)\:i\right)$

$\rm =7\left(\cos \left(\dfrac{\pi }{2}\right)+\sin \left(\dfrac{\pi }{2}\right)i\right)\cdot \:4.2426\left(\cos \left(\dfrac{\pi }{4}\right)+\sin \left(\dfrac{\pi }{4}\right)i\right)$

$\rm 7\cdot \dfrac{21213}{5000}e^{i\dfrac{\pi }{2}}e^{i\dfrac{\pi }{4}}$

$\rm =\dfrac{148491\left(-1\right)^{\dfrac{3}{4}}}{5000}$

=21-21i

After converting into the exponential form:

$\rm =\dfrac{148491\left(-1\right)^{\dfrac{3}{4}}}{5000}$

From part (b) and part (c) both results are the same.

Thus, the complex number -7i into trigonometric form is 7 (cos (90) + sin (90) i) and 3 + 3i in trigonometric form is 4.2426 (cos (45) + sin (45) i)

Learn more about the complex number here:

brainly.com/question/10251853

#SPJ1

3 0

2 years ago

An urn contains 10 balls numbered from 1 to 10. Carlo and Eric each draw a ball at the same time. Given that Carlo's number was

Rama09 [41]

Answer:

1/9

Step-by-step explanation:

There are 10 x 9 ways to choose two balls from the urn. Order does not matter, since Carlo must have the larger ball. So there are 10 choose 2 total ways to choose the balls. If Carlos has the 6, Eric can only have balls 1-5, so the answer is 5/45, or 1/9.

5 0

3 years ago

Please help me with this i need to submit it today

kaheart [24]

(3x12)+(2x19)-3-3-3-3-3 if that's not right super sorry

6 0

3 years ago