Answers
Step-by-step explanation:
the way I understand the description :
C is below B. they are on a kind of straight hill, and there is a straight "road" going up from C to B.
then, at B there is an antenna or other firm of mast going straight up.
therefore, this is not a right-angled triangle with 90 degrees at B (as it would be, if this would be in a flat plane).
but because it goes downhill from B to C the angle is 105 degree.
(a)(i)
now, imagine, there would be a horizontal plane either at B or at C. AB would have a true 90 degree angle with this plane. so, what is the angle of CB with this plane ?
this angle is the "excess" of the 90 degrees, as CB angles down from the horizontal plane at B, or angles up with the same angle from the horizontal plane at C.
what is the "excess" of 105 degrees vs. the standard 90 degrees ? 105 - 90 = 15 degrees.
(a)(ii)
the extended Pythagoras for not right-angled triangles :
c² = a² + b² - 2ab×cos(B)
B being the angle opposite of the Hypotenuse c.
so, we have
c² = 15² + 10² -2×15×10×cos(105) = 225 + 100 - 300×cos(105) =
= 325 - 300×cos(105) = 402.6457135...
c = 20.06603383... ≈ 20 m
Related Questions
a drink in japan costs 374 yen. The exchange rate is £1 = 189 yen. What is the cost in pounds
Answers
Answer:
Roughly £2
Step-by-step explanation:
multiply the echange rate by 2 , its 378Yen
Austin runs 6 miles in 50 minutes. At the same rate, how many miles would he run in 35 minutes?
Answers
Answer:
4.2 miles
Step-by-step explanation:
Speed = distance / time
Speed = 6 / 50 = 0.12 miles per minute
PS: You can change the minutes to hours if youd like and it'll be the same answer.
Since he is running at the same rate(speed)
Distance = speed * time
Distance = 0.12 miles/minute * 35 minutes = 4.2 miles
(if you changed your speed to be in miles / hour don't forget to change the 35 minutes to hours
giving Brainliest to whoever answer both
Answers
1. Yes
2. No
3. Yes
B.
1. Yes
2. No
3. No
Please help me! :D <3
Answers
Answer:
Well 5 times 1 is 2.5 which can't be and integer
so I looked it up an this is what I got How do you write 2.5 as an integer?
If this is the question, then Integer-Part[2.5] = 2, and the Fractional-Part[2.5] = . 5.
I would put 3 it because 2.5 as a hole number is 3
Step-by-step explanation:
Daniel is a piano teacher. He charges the same amount, s, for every teaching session. After 19 sessions, he has earned $1,235. How much does Daniel charge for 1 teaching session? Write a division equation.
Answers
Answer:
£65
Step-by-step explanation:
1235 / 19 = 65
(Meeting character limit)
Rearrange the numbers below from least to greatest
34.039 32.94 34.198 32.102 33.6
epic
PLSSSSS HELP-
Answers
Answer:
Least ------> Greatest
32.102, 32.94, 33.6, 34.039, 34.198
Answer:
32.102, 32.94, 33.6, 34.039, 34.198
Step-by-step explanation:
34.039, 32.94, 34.198, 32.102, 33.6
Rearrange:
34.198 > 34.039
33.6 > 32.94 > 32.102
New list: 32.102, 32.94, 33.6, 34.039, 34.198
-Chetan K
find meh x pls 10 points Uwu
−5/6=−1/4−7/10x
Answers
answer is 5/6
Step-by-step explanation:
multiplying by 60, we get,
50=15+42x
we can simplify it, 42x= 35,or x=5/6
Gotta find a LCD then times both asides by it then solve!
HELPMEPLZZ.
Figure ABCD is transformed to obtain figure A'B'CD Part A Write the sequence of transformations that changes figure ABCD to figure A'B'C'D' Explain your answer and write the coordinates of the figure obtained after each transformation. (6 points) Part B: Are the two figures congruent? Explain your answer (4 points)
Answers
Answer: yes because they both go to the 0 and has the same shape.
Step-by-step explanation: yes
Jared has four pieces of rope that are each 12.75 feet long. How many feet of rope does he have in total?
51 feet
50.8 feet
16.75 feet
12.79 feet
Answer=51 Feet
Answers
a lake has an area of 63800000000 square meters.
write this area in square kilometers, correct to 2 significant figures
Answers
Answer:
64,000 (2 s.f)
Step-by-step explanation:
1 km is 1000 metres
so, 1 km² = 1000 x 1000 m²
i.e. 1 km² = 1,000,000 m²
=> 63,800,000,000/1,000,000 = 63,800
The second significant figure is 3 --> 3000
so, to the nearest 1000 we have 64,000 (2 s.f)
Hope it help and if it is correct please give brainliest
Thank You
Need help with this pls asap
Answers
Given numbers 2 ,5,11, 4.5, 1/10, V3 then
a. Write two prime numbers from the above.
b- An integer root 121
c- A number 25 % of 18
d- An irrational number
Answers
Answer:
a. pick two between 2,5 or 11, they are all primes.
b. it's 11 since
[tex]11 {}^{2} = 121[/tex]
c. that's
[tex]18 \times \frac{25}{100} = 4.5[/tex]
(or think about it as half the half of 18, so half of 9)
d.
[tex] \sqrt{3} [/tex]
Rest can be written as a fraction
Geometry problem, Name the angle pair relationship and then determine which lines must be parallel based on the angles given If they do not prove lines parallel, write none.
Answers
Answer:
see below
Step-by-step explanation:
a) 1 = 4 they are corresponding angles when j and k are parallel
b) 3 + 4 = 180 these just lies on same straight line and they add up to 180 so none
c) 5 + 7 = 180 are consecutive interior angles when k and l are parallel
d) 6 = 7 they are alternate interior angles when k and l are parallel
and refer this link for theory on this topic
https://www.ixl.com/math/lessons/transversals-of-parallel-lines
Find the value of h and k.
Answers
Answer:
h = 6, k = 6.5
Step-by-step explanation:
The segment marked h is half the length of the one marked 3h-6.
2h = 3h -6
6 = h . . . . . . . add 6-2h
__
The segment marked k is half the length of the one marked 2h+1.
2k = 2(6) +1
k = 13/2 = 6.5 . . . . divide by 2
The values of h and k are 6 and 6.5, respectively.
How to multiply with square roots and normal number.
Answers
Answer:
To multiply square roots, we multiply the numbers inside the radical. Any numbers outside the radical are also multiplied.
Step-by-step explanation:
2.
Identify the axis of symmetry of the parabola.
A. x= 3
B. x= 6
C. x= 5
D. x= 4
Answers
Answer:
x=4
Step-by-step explanation:
The imaginary line that divides it goes through 4 on the x axis
Answer:
A. x= 3
Step-by-step explanation:
Order the given rational numbers from least to greatest:
-4 1/4
3.3
3 1/3
-4 1/4
-3
Answers
Answer:
-4 1/4
-4 1/4
-3 1/3
-3.3
3
Step-by-step explanation:
HELPPP!!!! Both questions are incredibly confusing to me !!!!!
Answers
Answer:
Step-by-step explanation:
I'm going to start with problem 3. You need to become familar with the kind of tricks teachers play on you.
Problem 3 depends on getting RS = RW.
RT = RT Reflexive property
<STR = <WTR A straight line having 1 rt angle actually has 2
ST = TU They are marked as equal
Triangle STR=Triangle WTR SAS
RS = RW Corresponding parts of = triangles are =
8x = 6x + 5 Subtract 6x from both sides
8x -6x = 6x - 6x + 5 Combine
2x = 5 Divide by 2
2x/2 = 5/2
x = 2.5
RU = 6*2.5 + 5
RU = 15 + 5
RU = 20
Now we can play with Question 4.
This question depends on the method used in three, although not entirely.
What you need to know is that W is on RT when you take a ruler and make RT longer. You can put W anywhere as long as it is on RT when it is made longer.
Directions
Make RT longer. Draw down and to your right.
Put a point anywhere on the length starting at T. Label this new point as W. There's your W. It goes anywhere on the part of RT made longer.
Draw UW.
Label UW as 8
Now draw another line from S to W. Guess what? By the methods used in question 3, it's also 8. So SW = 8
TW = TW Reflexive
<UTW = STW Same reason as in 3. UtW is a right angle
UT = ST Given (the marking tells you so.
ΔUTW = ΔSTW SAS
UW = SW Corresponding parts of = triangles are =
SW = 8
The value of a baseball card can be represented by the equation y=3x+39,where x represents the number of years that Robert has owned the card and y represents the total value,in dollars,of the card.What was the value of the card when Robert originally purchased it?
Answers
Answer:
Im pretty sure it's $39
Step-by-step explanation:
if x=0 it cancels out leaving y=39
Solve the slope for the table.
Answers
Answer:
5
Step-by-step explanation:
Change in Y / Change in X = Slope
5/1 = 5
Justine and Kate are training for a race.
At every training session Justine runs x miles and Kate runs 3 more miles than Justine.
In one week, Justine and Kate both train every day.
In the 7 days they run 63 miles in total between them.
How many miles do Justine and Kate each run per day?
Answers
Answer:
Justine runs 3 miles a day and Kate runs 6 miles a day.
Step-by-step explanation:
x = number of miles ran in a day
x(7) + (x+3)(7) = 63
7x + 7x + 21 = 63
14x + 21 = 63
14x = 42
x = 3
3 + 3 = 6
Justine runs 3 miles a day and Kate runs 6 miles a day.
The picture shows $40.50 that two friends earned mowing a lawn.
They want to share the money equally.
Drag the money below to show how much each friend will get.
Answers
Answer:
Each friend gets $20.25
So $20.25 each
What is 2 hundredths in standard form in fifth grade
Answers
0.02
0._ is tenths and
0.0_ is hundredths
Answer:
Step-by-step explanation:
5th Grade Math 1.2, Place Value of Whole Numbers, Standard Form ... this is the name of the video. I hope it helps.
Noah earns $9.65 per hour. How much will he
earn next week if he works 18 hours?
Answers
Answer:
$1215.90
Step-by-step explanation
You take Noah's pay per hour of $9.65 then multiply it by how many hours he works 18. You then take that and multiply it by 7 for the days of the week.
Find the surface area! Please I need it quick
Answers
Step-by-step explanation:
We first find the area of a trapezium and rectangular faceFourmula to find the are of a trapezium is:Area=1/2*(B+b)*h =1/2*3.7*1.9 =3.515m²Since every rectangular face is different we gotta find each of themArea1=4.8*2.1 =10.08 m²Area2=4.8*1.4=6.72m²Area3=4.8*2.3=11.05m²Area4=4.8*1.9=9.12m²Now we find the area of the whole prismArea=3.515*2+10.08+6.72+11.05+9.12Area=44m²Sorry my wireless went down!!!Hope this helps and you already know what I would like to get1 gal = ____ pt
A) 8.085 pt
B) 8.85 pt
C) 88.5 pt
D) 0.8085 pt
eh?
Answers
Answer:
1 gal = ____ pt
A) 8.085 ptlelz XD
Given a circle with radius 5cm and using π=3.14 calculate it's circumference (I will make you Brainliest)
Answers
Answer:
Circumference = 31.4 feet
Area= 78.5 sq. feet.
Step-by-step explanation:
brainliest please?????
what is 400x800 do any one knows
Answers
Answer:
Step-by-step explanation:
320000 is your answer
- take off the zeros
-4x8= 32
-add the zeros back on
Answer=320,000
find the lowest common multiple of: 10 ,15 and 18
Answers
Answer:
90
Step-by-step explanation:
please full calculation
Answers
b = -3
c = 1
d = 3