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
HACTEHA [7]
3 years ago
9

Find bc. Round the answer to the nearest tenth.

Mathematics
2 answers:
Nadusha1986 [10]3 years ago
6 0
Is BC=2.3 one of the options?

For that question, you can use the cosine rule, where;
{a}^{2}  =  {b}^{2}  +  {c}^{2}  - 2(b)(c) \cos( \alpha )
In this case, we have..
{bc}^{2}  =  {1.8}^{2}  + {2.1}^{2}  - 2(1.8)(2.1) \cos(70)
Solving for BC with this will get you 2.250406, rounded off to the tenth is 2.3.
Lana71 [14]3 years ago
4 0

Answer:

BC = 2.3

Step-by-step explanation:

Given  : A triangle With side AB = 1.8 , AC = 2.1 and angle = 70 degree.

To find : Find BC .

Solution : We have given

AB = 1.8 , AC = 2.1

Angle = 70 degree.

By the cosine rule : The third side of a triangle when we know two sides and the angle between them.

BC² = AB² + AC² − 2AB(AC) cos(A).

Plug the values AB = 1.8 , AC = 2.1

BC² = (1.8)² + (2.1)² − 2(1.8)(2.1)cos(70)

 BC² = 3.24 + 4.41 - 7.56 ( 0.34).

BC²   = 3.24 + 4.41 - 2.5704

  BC² = 5.0796.

Taking square root

BC = √ 5.0796.

BC = 2.25

Nearest tenth = 2.3

Therefore, BC = 2.3

You might be interested in
Find an equivalent expression to represent the product shown as a sum.
antiseptic1488 [7]
3(2x + 4)

3 x 2x = 6x
3 x 4 = 12

6x + 12 is your answer

B is your answer

hope this helps
3 0
3 years ago
Read 2 more answers
Jon earns $4 for delivering groceries and $2 for each delivery he makes.
asambeis [7]

Answer:

$14

Step-by-step explanation:

ok so since he is delivering groceries he gets $4.

now when he delivers he get $2 more, so for each house he delivers to he adds $2 to that $4.

so the easiest was to do this is 5x2.

5x2 is 10.

now $10 is how much more he gets on top of the $4, so now we need to add the $4 to the $10.

your answer is $14  

plz mark brainliest!

8 0
2 years ago
Luke buys $14.35 worth of gasoline for his car. If the gas station $1.409 per gallon, how many gallons did he get? Round to the
iragen [17]

Answer:

10.2 gallons

Step-by-step explanation:

Luke buys $14.35 worth of gasoline for his car

The gas station sells at $1.409 per liter

Therefore the number of gallons that luke buys can be calculated as follows

= 14.35/1.409

= 10.2 gallons

4 0
3 years ago
Read 2 more answers
8. Which statement can be represented by the equation shown?<br> 9x-2=8x
Thepotemich [5.8K]

Answer:

A or the 1st one

Step-by-step explanation:

Angelo is making 9 dollars per hour but, loses 2 dollars due to the bus fee. So in math form that would be:

9x - 2

And the second part is Tom makes 8 dollars per hour but doesn't have to pay for bus fee. In math form that would be;

8x

So put that together that would be

9x - 2 = 8x

3 0
2 years ago
I am a three-digit number. My second digit is 4 times bigger than the third digit. My first digit is 3 less than my second digit
labwork [276]

Answer:

285

Step-by-step explanation:

use algebra

third is x

second is 4x

first is 4x-3

x+4x+4x-3

9x-3 = x+x+1+x+2

9x-3=3x+3

12x=6, divide x=2

third is 2, sec is 8, first is 5

3 0
3 years ago
Other questions:
  • I need the answer please!!!
    11·1 answer
  • On the coordinate grid of a map Josie‘s house is located at (2,7) her school is located at (-5,5) if each map unit equals one mi
    6·2 answers
  • Plzzzzz helpppp <br> If u can help me plz do
    12·2 answers
  • What is 3/5 equivalent to
    8·2 answers
  • Please help will vote brainlest
    14·1 answer
  • PLEASE HELP!!!! <br> Find m
    7·1 answer
  • The function f is defined by f(x) = 4x + 1. What is the value of f(3)?
    9·2 answers
  • a patio measures 8 ft by 12 ft by 3 inches. find the volume of the bricks; round to the nearest tenth, if necessary. if the dens
    13·1 answer
  • Which of the following statements best describes the lines?
    9·1 answer
  • Find the equation of the straight line with the following gradient point c) 5, (-1,-3)​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!