Use the Law of Cosines to solve for the side BC. Round your answer to the point
nearest whole number. Write the value only *

Use The Law Of Cosines To Solve For The Side BC. Round Your Answer To The Pointnearest Whole Number.

Answers

Answer 1

Answer:

BC = 50

Step-by-step explanation:

Law of Cosines:

c^2 = a^2 + b^2 - 2ab*cosy (c is BC)

c^2 = 30^2 + 21^2 - 2(30)(21)cos123

c^2 = 900 + 441 - 1260*(-0.888)

c^2 = 1341 - (-1118.841)

c^2 = 2459.841

c = 49.597

c = 50


Related Questions

It took a skydiver 12 seconds to drop 450 feet. What is the rate (in feet per/second) of the skydiver's drop?

Answers

Answer:

37.5 feet per second

Step-by-step explanation:

Answer:

37.5 ft per second

Step-by-step explanation:

How long will it take to fill the tank with 40 gallons of water?

Answers

Answer:

15-25

Step-by-step explanation:

10-15 minutes hope this helps also can someone help me what is the summary of chapter 27 book two roads

Noor, Layla, and Diego play a trivia game. Noor’s score is -2. Layla’s score is 3/4 of Noor’s score. Diego’s score is 2/3 of Layla’s score. What is Diego’s score?

Answers

Answer:

layla is savege score in mobile legends and diego's score in ml is 20

class A has 11 pupils and class B has 14 pupils. Both classes sit the same maths test. the mean score for class A is 32. The mean score for class B is 38. What is the mean score(rounded to 2DP) in the maths test across both classes?​

Answers

Answer:

35.36

Step-by-step explanation:

For Class A

Class A has 11 pupils

The mean score for Class A is 32.

The total score of the students =

Mean score × Number of pupils

= 32 × 11

= 352

For Class B

Class B has 14 pupils. The mean score for class B is 38.

The total score of the students =

Mean score × Number of pupils

= 38 × 14

= 532

Total number of pupils for both classes = (11 + 14)pupils

= 25 pupils

Total score for both class = 532 + 352

= 884

The mean score(rounded to 2DP) in the maths test across both classes is calculated as:

Total score of both classes÷ Total number of pupils

884 ÷ 25

35.36

The y-intercept of the graph is the function value y=

The greatest value of y is y=

Answers

Answer:

The y-intercept of the graph is the function value y = 0

The greatest value of y is y = 2

im not sure how to do this

Answers

Answer:1 =5

             2 = 55/3

             3= 11

Step-by-step explanation:

hope i could help lol

Steps :
1. Take the whole number and bring it to the other side (ex. -10) but convert the sign (-10 changed to +10) then add together
2. Add the x’s together
Divide the x from the other side

What are the intercepts of the equation: 6x - y = 12

Answers

X=2 y= 12+6x, xeR



hope that helps

Can y’all plz help me !!!!!

Answers

Answer:

2

Step-by-step explanation:

4*2=8 and 8+4=12

X=2

4x+4=12
- 4
4x=8/4
X=2


Where does the line 3x + 7y = 2 intersect the x- and y-axis?
A- x-axis: 32; y-axis: -72
B- x-axis: 23; y-axis: -27
C- x-axis: 32; y-axis: 72
D- x-axis: 23; y-axis: 27

Answers

Do you have a picture/graph I can look at?

Can you help me please and thank you:)

Answers

3x=y, x=y/3, and x=3/y just trust me

Find the area of triangle ABC.
Give your answer correct to 1 decimal

Answers

Answer:

let

a=9cm

b=8cm

c=10cm

Step-by-step explanation:

now

s=(a+b+c)/2=(9+8+10)/2=13.5

area of traingle=√(s(s-a)(s-b)(s-c))=√(13.5(13.5-9)(13.5-8)(13.5-10))=34.197cm²

Can 80°, 75 and 20° form a triangle Justify
Select one:
0
a. No
b. Yes
c. None

Answers

Answer:

A. No

Step-by-step explanation:

We know that the sum of the angles of a triangle is always equal to 180°. The sum of the angles of a triangle is not equal to 180° in this equation. Hence, we cannot form a triangle.

B
Yes it can
The answer is b

PLZ HELP
I’m failing

Answers

Answer:

h = 5

Step-by-step explanation:

h + 9 = 14        

Subtract 9 from both sides

h +9  - 9 = 14 - 9

         h = 5

Answer:

5

Step-by-step explanation:

9+5=14

Find the sum of5x^2-3x+2 and 3x^2-4x-1

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Simplifying

(3x + -2)(4x + -1) = 0

Reorder the terms:

(-2 + 3x)(4x + -1) = 0

Reorder the terms:

(-2 + 3x)(-1 + 4x) = 0

Multiply (-2 + 3x) * (-1 + 4x)

(-2(-1 + 4x) + 3x * (-1 + 4x)) = 0

((-1 * -2 + 4x * -2) + 3x * (-1 + 4x)) = 0

((2 + -8x) + 3x * (-1 + 4x)) = 0

(2 + -8x + (-1 * 3x + 4x * 3x)) = 0

(2 + -8x + (-3x + 12x2)) = 0

Combine like terms: -8x + -3x = -11x

(2 + -11x + 12x2) = 0

Solving

2 + -11x + 12x2 = 0

Solving for variable 'x'.

Factor a trinomial.

(1 + -4x)(2 + -3x) = 0

Subproblem 1

Set the factor '(1 + -4x)' equal to zero and attempt to solve:

Simplifying

1 + -4x = 0

Solving

1 + -4x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1' to each side of the equation.

1 + -1 + -4x = 0 + -1

Combine like terms: 1 + -1 = 0

0 + -4x = 0 + -1

-4x = 0 + -1

Combine like terms: 0 + -1 = -1

-4x = -1

Divide each side by '-4'.

x = 0.25

Simplifying

x = 0.25

Subproblem 2

Set the factor '(2 + -3x)' equal to zero and attempt to solve:

Simplifying

2 + -3x = 0

Solving

2 + -3x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-2' to each side of the equation.

2 + -2 + -3x = 0 + -2

Combine like terms: 2 + -2 = 0

0 + -3x = 0 + -2

-3x = 0 + -2

Combine like terms: 0 + -2 = -2

-3x = -2

Divide each side by '-3'.

x = 0.6666666667

Simplifying

x = 0.6666666667

Solution

x = {0.25, 0.6666666667}

2.) 5x^2-3x=2

We move all terms to the left:

5x^2-3x-(2)=0

a = 5; b = -3; c = -2;

Δ = b2-4ac

Δ = -32-4·5·(-2)

Δ = 49

The delta value is higher than zero, so the equation has two solutions

We use following formulas to calculate our solutions:

x1=−b−Δ√2ax2=−b+Δ√2a

Δ−−√=49−−√=7

x1=−b−Δ√2a=−(−3)−72∗5=−410=−2/5

x2=−b+Δ√2a=−(−3)+72∗5=1010=1

Lupita y Fernando y Andrés quieren comprar entre los tres una bicicleta que ven todos los días en el aparador de la tienda todo para todos para sus vacaciones le han deseado tanto que decidieron comprarla cada uno sacó cuentas de lo que debería pagar por la bicicleta​

Answers

Answer:

el precio de la biciclete entre 3 es lo que van a pagar cada quien.

Step-by-step explanation:

What is the measurement of this angle?

__°​

Answers

The answer is 10

Explanation

A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the given equation. Using this equation, find out the maximum amount of profit the company can make, to the nearest dollar.

y=-x^2+90x-454

Answers

9514 1404 393

Answer:

  $1571

Step-by-step explanation:

If we assume that y is profit in dollars, the maximum value of y is revealed by a graph to be ...

  ymax = $1571

The maximum profit the company can make is $1571 at a selling price of $45 each.

_____

The function can be written in vertex form as ...

  y = -(x^2 -90x) -454

  y = -(x^2 -90x +45^2) -454 +45^2

  y = -(x -45)^2 +1571

Because the leading coefficient is negative, we know this vertex represents a maximum. (x, y) = (45, 1571) at the vertex. Maximum profit is $1571.

Which is a composite number
81
61
71
41

Answers

Answer:

81

Step-by-step explanation:

A composite number has factor more than just one and itself.

Factors of 81=

1, 3, 9, 27, 81

A scale drawing of a building shows 1 inch = 8 feet. How many feet are represented by 3 ¾ inches on the drawing?

Answers

Answer:

30 feet

Step-by-step explanation:

3x8=24 ft

3/4x*8= 6 ft

What is 3 kilometers as meters

Answers

3 kilometers equals

Answer: 3000 meters















Answer:

3000 meters

Step-by-step explanation:

1 kilometer  = 1000 meters so 3 = 300 meters

Can the sides of a triangle have lengths 3, 7, and 15?

Answers

No because the positive length of a triangle would be 3, 7, 7 because the third side length must be greater than 4 and smaller than 8 so there for 7 would fit. So your answer is no.

Will give brainiest to the person who shows how to do the problems step by step (proportionally) and those with the correct answer
Questions (below the pictures):

Answers

Answer:

15. 1.125 hours = 1 hour 7 minutes 30 seconds

17. 3840 cal

18. 60 g

Step-by-step explanation:

15.

8 miles is to 3 hours as 3 miles is to x hours

8/3 = 3/x

8x = 3 * 3

8x = 9

x = 1.125

Answer: 1.125 hours = 1 hour 7 minutes 30 seconds

17.

1/2 avocado is to 160 cal as 12 avocados are to x cal

(1/2)/160 = 12/x

(1/2)x = 12 * 160

x = 24 * 160

x = 3840

Answer: 3840 cal

18.

We need the same units. We convert 2 1/2 cups into tablespoons.

1 cup = 16 tablespoons

2 1/2 cups = 2 1/2 * 16 tablespoons = 2.5 * 16 tablespoons = 40 tablespoons

Now we start the proportion.

1.5 g to 1 Tbsp is as x is to 40 Tbsp

1.5/1 = x/40

x/40 = 1.5

x = 1.5 * 40

x = 60

Answer: 60 g

please help urgent!!!!!

Answers

Answer:

The answer is B!!

Step-by-step explanation:

What do we know given from the statement above the photo? We are told <Q is congruent to <S, and QR is congruent to SR. So by given that, we have an angle (angle Q or angle S), a side (side QR or SR), and another angle (angle R), so we have ASA. I hope this helps!!

Answer:

b

Step-by-step explanation:

From the comment above the photo, what do we know? We are advised that <Q is <S, and that QR is SR-compatible. We've got a corner (angle Q or angle S), a line (side QR or SR), and a separate angle (angle R), so we have ASA. I hope that's good!!

Alex was thinking of a number. Alex doubles it
,then adds to get an answer or 22.7. What was the original number?

Answers

Answer:

5.675

Step-by-step explanation:

22.7/2= 11.35

11.35/2= 5.675

simplify the expression

Answers

Answer:

-88

Step-by-step explanation:

If a=2, we can say that -[tex]a^{2}[/tex] would be -4.

Secondly, if a=2 and b=-6 we can assume that 4ab would become -48.

Finally, if b=-6 we can say that -[tex]b^{2}[/tex] would become -36.

Adding all of those up gives you -88, your answer.

what is x? please help

Answers

the answer is 29. 61-90

Answer:

29

Step-by-step explanation:

This is a right triangle because it has the small square in the corner.

And when you have a right triangle the angle with the square in it is ALWAYS going to be 90 degrees.

It gave you one of the angle measurements which is 61.

90+61=151

And When you add all the angle measurements of a triangle it will ALWAYS be a total of 180 no matter what kind of triangle it is.

To find "x" you subtract the sum of the two angles you you know from 180.

180-151=29

Miles today 15 yesterday m hours today 2.5 yesterday 4

Plz help you will get 92pts

Answers

Do you have the full question?

Answer:

So this is free points right

Step-by-step explanation:

Sorry I will answer your latest questions

what is your solution to this equation ? 2x + 10 =28

Answers

Answer:

i believe x=9

Step-by-step explanation:

I took the answer, (28) and subtracted 10 which got me 18. then all I had to do was divide 18 by 2 to get x, which is 9. hope this helps :)

Answer:

x = 9

Step-by-step explanation:

We have: 2x + 10 = 28

Subtract 10 from both sides: 2x = 18

Divide both sides by 2: x = 9

1 Find m2R
2x + 106
16

Answers

Answer:

2(x+5308)

Step-by-step explanation:

Factor 2x+10616

2x+10616

=2(x+5308)

Parker's dog will be having four puppies. Parker performs a
simulation by tossing a coin to model whether these
puppies will be male or female.
• Let heads (H) = female puppy
• Let tails (T) = male puppy

Answers

Answer:

7/10 70%

Step-by-step explanation:

based on the coin flips, 7 out of 10 of the results have at least 2 female puppies. I hope this is correct :)

Answer: A

Step-by-step explanation: took the quiz and got it right

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