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3 years ago

9

Really really need this answer. Please help!

1 answer:

scZoUnD [109]3 years ago

4 0

Use the cosine function.

cos x = 2/12
cos x = 0.167

use the inverse of cosine:

x = 80.405

The answer is C.

Hope this helps :)

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What is the length of the radius of a circle with a center at 2 + 3i and a point on the circle at 7 + 2i?

dem82 [27]

You can calculate the difference/vector of both points:
$7+2i-(2+3i)=5-i$
then calculate the magnitude/length like pythagoras
$radius=\sqrt{5^2+(-i*-i)}\\=\sqrt{5^2+i^2}\\=\sqrt{5^2-1}\\=\sqrt{24}\\=\sqrt{4*6}\\=2*\sqrt{6}$

7 0

3 years ago

Read 2 more answers

1)Sheyna drive to the lake and back. It took two hours less time to get there than it did to get back. The average speed on the

ipn [44]

Answer:

8 hours

Step-by-step explanation:

Given:

Sheyna drives to the lake with average speed of 60 mph and

$v_1 = 60\ mph$

Sheyna drives back from the lake with average speed of 36 mph

$v_2 = 36\ mph$

It took 2 hours less time to get there than it did to get back.

Let $t_1$ be the time taken to drive to lake.

Let $t_2$ be the time taken to drive back from lake.

$t_2-t_1 = 2$ hrs ..... (1)

To find:

Total time taken = ?

$t_1+t_2 = ?$

Solution:

Let D be the distance to lake.

Formula for time is given as:

$Time =\dfrac{Distance}{Speed }$

$t_1 = \dfrac{D}{60}\ hrs$

$t_2 = \dfrac{D}{36}\ hrs$

Putting in equation (1):

$\dfrac{D}{36}-\dfrac{D}{60} = 2\\\Rightarrow \dfrac{5D-3D}{180} = 2\\\Rightarrow \dfrac{2D}{180} = 2\\\Rightarrow D = 180\ miles$

So,

$t_1 = \dfrac{180}{60}\ hrs = 3 \ hrs$

$t_2 = \dfrac{180}{36}\ hrs = 5\ hrs$

So, the answer is:

$t_1+t_2 = \bold{8\ hrs}$

8 0

3 years ago

Help me with my problems<br><br>(sorry if the text is small)

Amiraneli [1.4K]

#1 is x3
Bc x goes up 3 each time and y goes up 2 each time

4 0

2 years ago

E-mails do not require professionalism; it's acceptable to be informal. True False

Artyom0805 [142]

The answer is - False

3 0

2 years ago

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Find the sticker price and dealer's cost for the Tarop Series car. The base price given is $24,990.00. The options for the Tarop

podryga [215]

Alright, lets get started.

The base price is given : $ 24990

The dealer pays 76% of the base price means

he pays for base price : $24990 * \frac{76}{100}$

he pays for base price : $ 18992.4

For options, total : $868 + 452 + 1260 = 2580$

He pays 88% for options, means

he pays for options : $2580 * \frac{88}{100}$

he pays for options : $ 2270.4

So, total dealer pays : $18992.4 + 2270.4 +$ destination charges

So, total dealer pays : $18992.4 + 2270.4 + 630 =$ $ 21892.8

Hence dealer's cost : $ 21892.8

Price of sticker will be : $24990 + 868 + 452 + 1260 + 630$

Price of sticker will be : $ 28200

dealer's cost : $ 21892.8

Hope it will help :)

4 0

3 years ago

Read 2 more answers