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
mario62 [17]
3 years ago
14

What is the length of EF¯¯¯¯¯? Enter your answer as a decimal in the box. Round only your final answer to the nearest tenth. ft

A horizontally-aligned scalene triangle D E F. Side D E is labeled as 6 feet. Side D F is labeled as 11 feet. Angle D is labeled as 40 degrees.

Mathematics
2 answers:
Dovator [93]3 years ago
4 0
When finding the third side of a scalene triangle, use Law of Cosine with its formula

c^2 = A^2+B^2 - 2AB(cosC)

Now, you just have to input all your data in the formula, 

c^2 = 6^2+11^2 - 2(6)(11)(cos40degrees)
c^2 = 36+121 - 2(6)(11)(cos40degrees)
c^2 = 36+121 - 2(6)(11)(0.77)
c^2 = 157 - 101.12
c^2 = 55.88
c = square root of 55.88
c = 7.48 ft

Length of EF is 7.48 ft
sergey [27]3 years ago
4 0

Answer:

7.5 ft

Proof in pic:

You might be interested in
someone help on the "how did basil know" part before i sue and quit school. i just wanna sleep it's 12 am.
PtichkaEL [24]
Well, the last digit in the product will only come from the last digits of the numbers that you're multiplying together. So for 0.303 & 4.48, that last digits are 3 & 8 so that last digit in the product would come from
3 \times 8 = 24
So 4. There are only two options that end in 4, 1.35744 & 0.13574. You can by the magnitude of the numbers that it isn't as small as 0.13574 so the answer must be 1.35744.
4 0
4 years ago
Why am I so bad at math!!! Please help me. It would be much appreciated. ☻☺
Gnesinka [82]
X + 2y = -6
2y = -x - 6
  y = (-x - 6)/2

answer is D. Last one

y = (-x - 6) / 2
8 0
4 years ago
Write three measurments using grams and three measurements using milligrams total 15.4 grams
luda_lava [24]
2+3+10 g +1+1+2mg =15.4 grams
5 0
3 years ago
A clock hand rotated from 12 to 6 this is​
Nookie1986 [14]

Answer:

If it's the hour hand, 1/4 of a day or 6 hours have passed. If it's the minute hand, 1/48 of a day or 30 minutes have passed.

<em />

Step-by-step explanation:

<em>BRAINLIEST, PLEASE!</em>

6 0
3 years ago
The first and last terms of a 10-term arithmetic series are listed in the table. What is the sum of the series?
USPshnik [31]
The arithmetic sequence general formula is an = a1 + d *(n-1) where d is the arithmetic difference and n is an integer. In this case, upon derivation, the formula that represents the sum of the series is S = (a1  + an)*(n/2). Substituting, S = (3+75)*(10/2) equal to 390
3 0
3 years ago
Read 2 more answers
Other questions:
  • How do you do question 3 ?
    5·1 answer
  • Can someone help me with this please
    13·1 answer
  • ***WILL GIVE BRAINLYEST***
    11·2 answers
  • If it is 4 o’ clock now, what time will it be in 9 hours
    8·2 answers
  • Find the area of the image below:
    14·1 answer
  • What is the x-axis and the y-axis of -2x+2=-4​
    10·1 answer
  • Can someone please help me? make it right..
    5·2 answers
  • If you answer this you will get 100 points pls answer hurry it’s due in 20 mins
    13·2 answers
  • I though originally the answer was 1/4x+4 but tgats not it please help​
    5·2 answers
  • 100 students went on a field trip. Six busses were filled and 10 students traveled in
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!