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
Korvikt [17]
3 years ago
11

Please help me with trigonometry and law of sines I’m being timed and really need the help

Mathematics
1 answer:
Usimov [2.4K]3 years ago
8 0

Step-by-step explanation:

cosA = AC² + BC²- AB² / 2 • AC • BC

cos A = 13.5²+23.9²-12.7²/2• 13.5 • 23.9

You might be interested in
Find the area of this trapezoid. Include the correct unit in your answer.
NemiM [27]

Answer:

\displaystyle A _{ \text{trapezoid}} =  70 {m}^{2}

Step-by-step explanation:

we are given a trapezoid

we want to figure out the area

remember that,

\displaystyle A _{ \text{trapezoid}} =  \frac{a + b}{2} h

where a and b represent the parallel lines and h represents the height

we get from the pic that a and b are 5 and 15 respectively and h is 7

so substitute:

\displaystyle A _{ \text{trapezoid}} =  \frac{5 + 15}{2} \times  7

simplify addition:

\displaystyle A _{ \text{trapezoid}} =  \frac{20}{2} \times  7

simplify division:

\displaystyle A _{ \text{trapezoid}} =  10\times  7

simplify multiplication:

\displaystyle A _{ \text{trapezoid}} =  70

since we multiply two same units we of course have to use square unit

hence,

\displaystyle A _{ \text{trapezoid}} =  70 {m}^{2}

4 0
3 years ago
In the morning, the temperature was 15∘F. During the day, the temperature fell 37 degrees. Which expression shows how to find th
tino4ka555 [31]

Answer:

- 22°F

Step-by-step explanation:

Given that :

Morning temperature = 15°F

Change in temperature = fall by 37 degree

The temperature of the end of the day:

Morning temperature + (change in temperature)

Fall by 37° = decrease in temperature by 37° = - 37°

15°F + (-37°F)

15°F - 37°F

= - 22°F

6 0
3 years ago
in Ginoni farm shop you can buy her free range hens eggs in boxes of 4,6,9,20 this means for example you can have 21 eggs by buy
vazorg [7]
Number of eggs that can be bought from the shop must be in the form
E=4k + 6m + 9n + 20j

I will continue later ~
8 0
3 years ago
MATH: GRAPHS AND FUNCTIONS 3. HELP! 12 PTS (HARD)
JulijaS [17]

Answer:

Step-by-step explanation:

4 0
2 years ago
Can someone please help and explain ​
Nuetrik [128]

Answer:

2

Step-by-step explanation:

that is the least common denominator

3 0
3 years ago
Read 2 more answers
Other questions:
  • Plllllllsssssss answer quick
    13·1 answer
  • Which algebraic expression represents the phrase “two times the quantity of a number minus 12”?
    13·2 answers
  • At a baseball game, the probability that a fan brings a glove is 0.08. The probability that a fan is left-handed is 0.12. What i
    6·2 answers
  • 8 is to 32 as 9 is to N? What is N?
    9·1 answer
  • How do you find the solution set for -x^2+6x<0?
    10·1 answer
  • Simplify the expression:<br> 7r–3r+9r
    9·1 answer
  • Find value of cos75 degrees
    15·1 answer
  • I Need Help Please And Thank You
    10·1 answer
  • Round 62.475 to the nearest hundredth.
    10·2 answers
  • A camper lights an oil lantern at 12 noon and lets it burn continuously. Once the lantern is lit, the lantern burns oil at a con
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!