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2 years ago

I need help cause i already did this but i got a 67 and thats not good so helppp me

Mathematics

2 answers:

olga_2 [115]2 years ago

7 0

Subtract 10 from both sides

belka [17]2 years ago

7 0

Answer:

multiply (n+10) by 4

Step-by-step explanation:

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Find z1z2 if z1 = 2/5(cos63° + isin63°) and z2 = 10/3(cos117° + isin117°).

Airida [17]

Answer:

-10/3 is the answer

Step-by-step explanation:

Given are two complex numbers as

$z1=\frac{2}{5} (cos63 + isin63)\\z2=\frac{10}{3} (cos 117 + isin117})$

Recall Demoivre theorem as

(cosA+isinA)(cos A+isin B) = cos(A+B)+isin(A+B)

Hence here we have sum of angles as

A+B = 63+117 =180

$z1z2=\frac{2}{5} \frac{10}{3} (cos180+isin180)$

= $\frac{-10}{3}$

Since sin180=0 and cos 180=-1

7 0

4 years ago

We went on a road trip and drove 70 miles per hour.If we continued at this speed,how long would it take us to drive 420 miles.sh

jonny [76]

Answer:

6 hours

Step-by-step explanation:

420 ÷ 70 = 6. Divide the distance and speed to get the amount of time.

4 0

3 years ago

Someone please help

AleksandrR [38]

Replace y with 31:

31 = 7x -4

Add 4 to both sides:

35 = 7x

Divide both sides by 7:

x = 5

Input x = 5

6 0

2 years ago

Line m has a Slope Of -4/7 .Line n is perpendicular to m .What is the slope of line n?

amid [387]

Answer:

7/4

Step-by-step explanation:

x and y are exchanged for each other, and the sign is flipped.

7 0

2 years ago

What is the converse of the statement if p,then q

WINSTONCH [101]

Answer:

If q, then p

Step-by-step explanation:

The given conditional statement is "If p, then q"

We want to find the converse of this conditional statement.

The converse is formed by switching the hypothesis (p) and the conclusion (q).

Therefore the converse of the given conditional is "If q, then p"

4 0

3 years ago