Use the Law of Cosines to write an expression equivalent to a. I need this answer urgently pls!

Use The Law Of Cosines To Write An Expression Equivalent To A. I Need This Answer Urgently Pls!

Answers

Answer 1

9514 1404 393

Answer:

  a = √(b² +c² -2bc·cos(A))

  a = √(c² -b²)

Step-by-step explanation:

For sides a, b, c, and opposite angles A, B, C, the general form of the law of cosines is ...

  a² = b² + c² -2bc·cos(A)

An expression for 'a' can be written by taking the square root.

  a = √(b² +c² -2bc·cos(A))

__

If you recognize that cos(A) = b/c, then a substitution can be made:

  a = √(b² +c² -2(bc)(b/c)) = √(b² +c² -2b²)

  a = √(c² -b²) . . . . . . . same as the Pythagorean theorem


Related Questions

Is that right? Help, please

Answers

Answer:

The answer is GV and VD

Step-by-step explanation:

Those are the answers because of the points on the line. Please pick me as brainliest!!  :)

Find the Volume of a hemisphere that has a radius of 8 centimeters. Round to the nearest tenth

Answers

Answer:1072.3

Step by step:

use the hemisphere formula which is 2/3*pie*r^3

substitute 8 centimeters into the equation.

The Volume of a hemisphere is,

⇒ Volume of hemisphere = 1071.78 cm³

What is Multiplication?

To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.

We have to given that;

Radius of hemisphere = 8 centimeters

We know that;

Volume of hemisphere = 2/3 (πr³)

Hence, We get;

⇒ Volume of hemisphere = 2/3 × 3.14 × 8³

⇒ Volume of hemisphere = 1071.78 cm³

Thus, The Volume of a hemisphere is,

⇒ Volume of hemisphere = 1071.78 cm³

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somebody please help me in this question, I’ll give you brainlyest and giving you 20 points :)

Answers

Answer:

Step-by-step explanation:

Noice....

6(2y+6)=4(9+3y)

divide both sides by 2

6(2y+6) / 2 = 4(9+3y) / 2

then after simplification

3(2y+6) = 2(9+3y)

6y + 18 = 18 + 6y

w t hell

it cant be solved

it can be but i think its misprinted

Calculate x
I ll mark you as the brainliest

Answers

Answer

x = 18 cm

Step-by-step explanation:

Here, we want to calculate the value of x

let half of x = b

so b is the base of each right-triangle

As we can see, the triangle is isosceles

we can calculate the length of the base of one of the smaller right angled triangle and multiply by 2 to get the full x length

According to Pythagoras’ , the square of the hypotenuse equals the sum of the squares of the two other sides

15^2 = 12^2 + b^2

225 = 144 + b^2

b^2 = 225-144

b^2 = 81

b = √81

b = 9

but x = 2b

x = 2(9)

x = 18 cm

A circle has a circumference of 1,133.54 units.What is the diameter of the circle?

Answers

Answer:

361 units

Step-by-step explanation:

Which of the values in the set {1, 2, 3, 4} is a solution to the equation 3x + 3 = 15? (4 points) a 1 b 2 c 3 d 4

Answers

Answer:

3

Step-by-step explanation:

Answer: The answer is 4

Step-by-step explanation:
the x is equal to an exponent. Since 3x4 equals 12, and 12+3 equals 15

Find the slope of the line
y=-7x - 2​

Answers

Answer:

-7

Step-by-step explanation:

Hi there!

In the form y=mx+b

M is equal to your slope

B is equal to your why intercept

If you have any of these questions in the future just look at m!

-7 means the point goes down seven and one to the right!

Hope this helps!

Have a wonderful day :)

Answer:

-7

Step-by-step explanation:

y = mx+b

m = slope

b = y-intercept

y = (-7)x-2

m = -7

please answer these questions

Answers

What’s the question

Please solve this FAST!

Answers

Answer:

1 hour = 7.50

5 hours = 37.50

9 hours = 67.50

answer is

7.50 per hour.

97.50 = 13 hours

Step-by-step explanation:

like this

[tex] \frac{22.50}{3} [/tex]

or

[tex] \frac{52.50}{7} [/tex]

= 7.50/1 hour

hope it helps you ☺️

Answer:

1. 7.50

5. 37.50

9. 67.50

Unit rate- 15$ an hour.

She worked 11 hours.

Hope these answers are right and hope they help.

A shark is swimming 42 feet below sea level. If the angle of depression from a boat on the water to the shark is 23°, what is the horizontal distance between the boat and the shark? Show your work to receive full credit. Round to the nearest hundredth if necessary. ​

Answers

Answer:

BC ≈ 98.95 feet

Step-by-step explanation:

From the figure attached,

A shark is swimming 42 feet below sea level at point A and a boat on the water is at point C.

If the angle of depression from the coat to shark is 23°,

tan(23°) = [tex]\frac{\text{Opposite side}}{\text{Adjacent side}}[/tex]

tan(23°) = [tex]\frac{AB}{BC}[/tex]

BC = [tex]\frac{AB}{\text{tan}(23)}[/tex]

BC = [tex]\frac{42}{\text{tan}23}[/tex]

BC = 98.947

BC ≈ 98.95 feet

42/48 simplify and trlurn to decimal​

Answers

0.875
hope that helps
Both numerator and denominator are divisible by 6 so can simply to 7/8
1/8 is 0.125
0.125x7 is 0.875

(3x-4)(x+5)= I need help with this fast

Answers

Answer:

3x^2+11x-20

Step-by-step explanation:

step 1 3x(x+5)-4(x+5)

step 2 3x(x+5)-4(x+5)= 3x^2+15-4(x+5)

step 3 3x^2+15x-4x+20

Given the equation: y = -3x + 5

Which of the following equations would create a system of equations with INFINITE SOLUTIONS?

A) y = 1/3x - 5

B) y = 5 + -3x

C) y = 3 + 5x

D) y = 5x +3

Answers

Answer:

B

Step-by-step explanation:

They both are the same equation with the same slope and y intercept which means that they are the same line, thus concluding that they will have infinite points of intersection.

I think it’s B) not sure but hope it helps

HERES JOHNYYYY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Johnny, Johnny
Yes, papa?
Eating sugar?
No, papa.
Telling lies?
No, papa.
Open your mouth!
HAHAHAH!

I need help..........​

Answers

Answer:

[C] 3 ⅔

Explanation:

5 ⅓ - 1 ⅔

= 3 ⅔

How many pounds are in 6 tons, 200 pounds

Answers

Answer:

there are 12000 pounds in 6 tons

There are 12,200 pounds in 6 tons, 200 pounds .

To convert tons to pounds, we need to multiply the number of tons by the conversion factor of 2,000 pounds per ton .

A ton, also referred to as a short ton, is a unit of weight equal to 2,000 pounds .

Given that there are 6 tons and 200 pounds, we can calculate the total weight in pounds as follows :

6 tons * 2,000 pounds/ton + 200 pounds = 12,000 pounds + 200 pounds = 12,200 pounds .

Therefore, there are 12,200 pounds in 6 tons, 200 pounds .

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Can y’all help with this question plz

Answers

Pi x diameter = 14pi or 43.99 in.

Given the set of ordered pairs: {(1,3), (2,7), (x,5), (6,4)}.
What is a value for x that would NOT make the set a function? Explain why.

Answers

Answer:

2

Step-by-step explanation:

2 is a value of x that would not make the set a function because a function can't have multiple coordinates wit hthe same domain (x-coordinate). 2 is a domain that has already been used in the point (2,7). If this is used in (x,5), the point would become (2,5) and repeat a domain.

Note:

The x-coordinate could also be 1 or 6 because they have been used as domains as well.

Hope it helps!

Two similar triangles are shown. What is the measure of ∠P?

Answers

Answer:

68.2

Step-by-step explanation:

if the triangles are similar then all of the angles are the same. The only thing that changes is the side lengths.

Answer:

[tex]63.2[/tex]°

Step-by-step explanation:

since the triangles are similar they have identical angle measures are the same

however you could solve it this way too:

[tex]A+B+C=180[/tex]

all measures of a triangle add up to 180

[tex]23.8+90+C=180[/tex]

[tex]116.8+C=180[/tex]

[tex]C=63.2[/tex]

Fill in the blank.
19/2 =

Answers

Answer:

9.5

Step-by-step explanation:

Answer:

9 1/2

Step-by-step explanation:

or 9.5 depending on which way they want the answer

You have to divide 19 and 2 and you get your answer

Vincent van Gogh is making one-color versions of all his paintings. He uses the colors in the following order and then starts over from the beginning: red blue pink green a purple. what color is painting 31?

Answers

Answer:

The color of painting 31 is RED

Step-by-step explanation:

it should be red :)

Vincent vanThat answer is 37

A bakery uses 44 cups of flour to make 10 loaves of bread. How many cups of flour are there per loaf?

Answers

Answer: 4.4

Step-by-step explanation:

44 divided by 10

Answer:

4.4 cups of flour

Step-by-step explanation:

You would have to divide 44(cups of flour) by 10(loaves of bread) to get the amount of cups of flour for each loaf. 44/10=4.4

How many pounds of $1.75/lb trail mix should a grocer combine with 3 lb of $3.75/lb trail mix to get $2.95/lb trail mix? I WILL GIVE BRAINLIEST. PLLLLS!!!

Answers

Answer:

1.847

Step-by-step explanation:

divide 2.45 and 1.75 dats ur ans

The grocer should combine 2 pounds of $1.75/lb trail mix with 3 pounds of $3.75/lb trail mix to get 5 pounds of $2.95/lb trail mix.

What is an expression?

Expression in maths is defined as the relation of numbers variables and functions by using mathematical signs like addition, subtraction, multiplication, and division.

Let's assume that the grocer needs to combine x pounds of $1.75/lb trail mix to the 3 lb of $3.75/lb trail mix.

To find out how many pounds of $1.75/lb trail mix are needed, we can use the following equation:

$1.75x + $3.75(3) = $2.95(x + 3)

Simplifying the equation, we get:

$1.75x + $11.25 = $2.95x + $8.85

Subtracting $1.75x from both sides, we get:

$11.25 = $1.20x + $8.85

Subtracting $8.85 from both sides, we get:

$2.40 = $1.20x

Dividing both sides by $1.20, we get:

x = 2

Therefore, the grocer should combine 2 pounds of $1.75/lb trail mix with 3 pounds of $3.75/lb trail mix to get 5 pounds of $2.95/lb trail mix.

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Michelle and Rhonda eat dinner at
la fancy restaurant, Their bill came to
$105.36. They gave their waiter a tip that
was 22% of the bill. About how much
money did they give the waiter for his tip.

Answers

Answer:

$22.17

Step-by-step explanation:

105.36 multiplyed by 0.22 ( you need to change the 22% to a decimal so just make it 0.22) then once you multiplyed them then you get your answer.

factor: p2−6−q(p2−6)2

Answers

Answer:

(p2−6)(1−2q)

Step-by-step explanation:

hope this helped <3


help me please it’s due today

Answers

Answer: -1/2

Step-by-step explanation:

In circle o, which term correctly identifies line XY?



Аtangent
B chord
с secant
D diameter

Answers

B.Chord.Hope this helped.

Answer:

secant

Step-by-step explanation:

Please help! (i'll give the best answer brainliest)

Answers

Answer:

I think False umm...

i'm so so sorry if im rong

Step-by-step explanation:

This statement is in fact true.

A bag contains pennies, nickels, dimes and quarters. There are 50 coins in all. Of the coins 16% are pennies and 42% are dimes. There are 5 more nickels then pennies. How much does the bag contain

Answers

Answer: 21 Nickels

21 dimes

8 pennies

Step-by-step explanation:

The recipe calls for 2 cups of flour for every cup of sugar.

What is the ratio of sugar to flour?

Answers

The ratio is 1:2
Hope this helps!!!!
The answer is 1:2 I think
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