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3 years ago

7+7x;7(x+1/7 expression

Mathematics

1 answer:

svet-max [94.6K]3 years ago

7 0

Answer:

Add the expressions which gives you a Answer of 14z + 8 Hope this helps :)

Now if you want i can add more detail Just ask

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Find the product of z1 and z2, where z1 = 7(cos 40° + i sin 40°) and z2 = 6(cos 145° + i sin 145°).

Oduvanchick [21]

For two complex numbers $z_1=re^{i\theta}=r(\cos\theta+i\sin\theta)$ and $z_2=se^{i\varphi}=s(\cos\varphi+i\sin\varphi)$ , the product is

$z_1z_2=rse^{i(\theta+\varphi)}=rs(\cos(\theta+\varphi)+i\sin(\theta+\varphi))$

That is, you multiply the moduli and add the arguments. You have $z_1=7e^{i40^\circ}$ and $z_2=6e^{i145^\circ}$ , so the product is

$z_1z_2=7\times6(\cos(40^\circ+145^\circ)+i\sin(40^\circ+145^\circ)=42(\cos185^\circ+i\sin185^\circ)=42e^{i185^\circ}$

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3 years ago

Read 2 more answers

if a store is offering 20% discount on all items. is there a proportional relationship between the original price of an item and

Novosadov [1.4K]

Answer:

A store is offering a 14% discount on all items. Write an equation relating the sale price S for an item to its list price L.

Step-by-step explanation:

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3 years ago

Della bought a tree sampling that was 2 1/4 feet tall. During the first year, it grew 1 1/6 feet. After two years, it was 5 feet

Pani-rosa [81]

Answer:

tree sampling: 2 1/4ft

through 1 year grown: 1 1/6ft

after two years growing: 5ft

1 1/6 coverted into a decimal is 0.16

0.16 x 32 = 5.12 (5)

not sure if this is right, but hope it helps

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4 years ago

Find the coordinates of k

marin [14]

If you plot the coordinates on a piece of graph paper your answer would come out too (1,-8)

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3 years ago

Manuel rented a truck for one day. There was a base fee of $14.95, and there was an additional charge of 87 cents for each mile

sp2606 [1]

base fee 14.95

0.87 cents per mile

total =248.98

248.98-14.95 = 234.03

234.03/0.87 =269 miles

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4 years ago