All categories

2 years ago

Pls hurry I need the answer

Mathematics

1 answer:

katrin [286]2 years ago

3 0

<h3>Answer: 48 degrees</h3>

=============================================

Work Shown:

Apply the law of cosines

a^2 = b^2 + c^2 - 2*b*c*cos(A)

10^2 = 13^2 + 11^2 - 2*13*11*cos(A)

100 = 290 - 286*cos(A)

100-290 = -286*cos(A)

-190 = -286*cos(A)

190 = 286*cos(A)

286*cos(A) = 190

cos(A) = 190/286

A = arccos(190/286)

A = 48.368620460647

A = 48

Make sure your calculator is in degree mode.

You might be interested in

More than 450 students traveled to a state park for a field trip. The school allowed 6students to travel by car, and the rest tr

ki77a [65]

Answer:

Step-by-step explanation:

Let b= number of people per bus

10b + 5 > 450

10b > 445

b > 44.5

Minimum per bus is 45 students

6 0

3 years ago

Find the value of x show your work

Ksivusya [100]

Answer:

x≈13.08

Step-by-step explanation:

We use the pythagora's theorem

$a^{2} +b^2=c^2\\a=5\\b=x\\c=14\\5^2+x^2=14^2\\x^2=196-25\\x^2=171\\x=3\sqrt{19} =13.08$

4 0

3 years ago

The annual interest rate of Jacques' savings account is 3.6%, and simple interest is calculated monthly. What is the periodic in

kifflom [539]

Divide by 12 equals 0.3

3 0

3 years ago

Read 2 more answers

Theresa Morgan, a chemist, has a 30% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each sh

Bogdan [553]

Let x represent the number of liters of 50% acid Theresa puts into the mix. The the number of liters of 30% acid will be (420-x). The total amount of acid in the final solution will be ...
0.50x + 0.30(420-x) = 0.45(420)
0.20x + 126 = 189 . . . . . . . . . . . . . . . simplify
0.20x = 63 . . . . . . . . . . . . . . . . . . . . . subtract 126
x = 63/0.20 = 315 . . . . . . . . . . . . . . . liters of 50% solution
(420-x) = 420-315 = 105 . . . . . . . . . liters of 30% solution

Theresa should mix ...
105 liters of 30% solution
315 liters of 50% solution

7 0

3 years ago

Homework help!!!!!!!

GREYUIT [131]

Answer:

r = -9

Step-by-step explanation:

the less the negative number is the more it is .

7 0

2 years ago