1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kisachek [45]
2 years ago
5

Help me please! a = 3, b = 5, and c = 7. What is m&Bº to the nearest tenth?

Mathematics
1 answer:
Anastaziya [24]2 years ago
4 0

Answer: m∡B°=38,2°.

Step-by-step explanation:

a=3,  b=5,  c=7  ∡B°=?

b^2=a^2+c^2-2*a*ccosB^0\\2*a*c*cosB^0=a^2+c^2-b^2\\cosB^0=\frac{a^2+c^2-b^2}{2*a*c} \\cosB^0=\frac{3^2+7^2-5^2}{2*3*7} \\cosB^0=\frac{9+49-25}{2*3*7} \\cosB^0=\frac{33}{42} \\cosB^0=\frac{11}{14}\\

m∡B°=arccos(\frac{11}{14})

m∡B°≈38,2°.

Good luck!

You might be interested in
(28 ⋅ 5−5 ⋅ 190)−2 ⋅ ⋅ 228 (5 points)<br><br> Write your answer in simplified form.
Klio2033 [76]
Hello!

Let's follow the BEDMAS rule.

First we should do everything inside the brackets. According to BEDMAS we should do multiplication first before subtraction:

(28 × 5 - 5 × 190) 

28 × 5 = 140
5 × 190 = 950

(140 - 950) = -810 

So now we have: 

(-810 - 2 × 5^-2) / 2^3 

Next, we do exponents so: 

5^-2 = 1/25 
2^3 = 8 

(-810 - 2 × 1/25) / 8

(-810 - 2/25) / 8

(-20252/25) / 8 = -5063/50

So now we have:

(-5063/50)^4 × 288

If we plug the first term into a calculator and out it to the party of 4, we get:

105136058.7 

So that number times 288 we get:

3.03x10^10 as the Correct Answer

I Hope my answer has come to your Help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead! :)
6 0
3 years ago
When salt and water are combined, they form a salt or saline solution. How much ml of water must be added to 150 mL of an 80% sa
Karolina [17]
50%. Might be wrong but all I did was reduce 30% from 80%
3 0
3 years ago
Help me please 7−s/2&gt;3
Alja [10]

Answer:

s < 8

Step-by-step explanation:

7−s/2>3

Subtract 7 from each side

7-7−s/2>3-7

-s/2 > -4

Multiply each side by -2.  Remember to flip the inequality since we are multiplying by a negative.

-s/2 * -2 < -4*-2

s < 8

3 0
4 years ago
Read 2 more answers
The point (8,12) was dilatated to become point (2,3) what was the scale factor
faust18 [17]

Answer:

1/4

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
ANSWER THIS ASAP DONT SEND A FILE AT ALL !! I NEED THE ANSWER TO QUESTION
evablogger [386]

Answer: 90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you.

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • If 3 x (2 + 3) = •, which expression is equal to •?
    15·1 answer
  • In two or more complete sentences, explain the theorem used in solving for the range of possible lengths of the third side, AB o
    7·2 answers
  • 4x+3y-24=0<br>find the y and x intercept show work<br>​
    15·2 answers
  • Find an equation for the parabola that satisfies the given conditions. (a) vertex (0, 0); focus (8, 0).
    9·1 answer
  • Which value of a would make the expression 5 1/3 divided by 4/a equivalent to a whole number?
    11·1 answer
  • HELP HELP HELP HELP HELP
    8·2 answers
  • Work out this eaquation
    12·1 answer
  • Evaluate 5p when p= 11.
    14·2 answers
  • PLEASE ANSWER. WILL GIVE BRAINLIEST. For a certain type of sand, 1 cubic foot weighs 80 pounds. The sand goes in a container tha
    11·1 answer
  • Please help me asap, i suck at math tbh :)<br><br> ty!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!