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3 years ago

Pick the correct description of the line 2x -4y=6

Mathematics

1 answer:

DENIUS [597]3 years ago

3 0

Answer:

y=6-2x/-4

Step-by-step explanation:

y= 1/2x-3/2

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Hi, teacher I was absent these days and I didn’t understand anything about this lesson and I need help this is not count as a te

motikmotik

Given:

There are given that the cos function:

$cos210^{\circ}=-\frac{\sqrt{3}}{2}$

Explanation:

To find the value, first, we need to use the half-angle formula:

So,

From the half-angle formula:

$cos(\frac{\theta}{2})=\pm\sqrt{\frac{1+cos\theta}{2}}$

Then,

Since 105 degrees is the 2nd quadrant so cosine is negative

Then,

By the formula:

$\begin{gathered} cos(105^{\circ})=cos(\frac{210^{\circ}}{2}) \\ =-\sqrt{\frac{1+cos(210)}{2}} \end{gathered}$

Then,

Put the value of cos210 degrees into the above function:

So,

$\begin{gathered} cos(105^{\circ})=-\sqrt{\frac{1+cos(210)}{2}} \\ cos(105^{\operatorname{\circ}})=-\sqrt{\frac{1-\frac{\sqrt{3}}{2}}{2}} \\ cos(105^{\circ})=-\sqrt{\frac{2-\sqrt{3}}{4}} \\ cos(105^{\circ})=-\frac{\sqrt{2-\sqrt{3}}}{2} \end{gathered}$

Final answer:

Hence, the value of the cos(105) is shown below:

$cos(105^{\operatorname{\circ}})=-\frac{\sqrt{2-\sqrt{3}}}{2}$

4 0

1 year ago

Sales tax is 7% what is the amount of sales tax you would pay this bill

AleksAgata [21]

% means per 100

so when figuring out percents it's good to use 100

on $100 7% would mean $7

on $50 7% would mean $3.5

in $200 7% would mean $14

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2 years ago

A regular hexagonal prism has a height of 12 cm and base edge length of 10 cm. Identify its lateral area and surface area rounde

kolbaska11 [484]

To find the l.a., you multiply the perimeter of the base (the hexagon) by the height.
l.a. = 60 x 12

surface area is harder :(
you have to find the apothem and all that jazz. sorry i can't help more, good luck!

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3 years ago

Simplify the square root of 2 multiplied by the square root of 18

zimovet [89]

The answer is 9 for sure

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3 years ago

(10 points!!!) AND I’LL MAKE YOU BRAINLEST

Mnenie [13.5K]

Answer:

nnnononon0j9inononono

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3 years ago