Answers
Answer:
BC ≈ 14.7 m
Step-by-step explanation:
Using the Sine rule in Δ ABC
[tex]\frac{AB}{sinC}[/tex] = [tex]\frac{BC}{sinA}[/tex]
To find ∠ A subtract the 2 given angles from 180°
∠ A = 180° - (90 + 28)° = 180° - 118° = 62°
Then
[tex]\frac{7.8}{sin28}[/tex] = [tex]\frac{BC}{sin62}[/tex] ( cross- multiply )
BC × sin28° = 7.8 × sin62° ( divide both sides by sin28° )
BC = [tex]\frac{7.8sin62}{sin28}[/tex] ≈ 14.7 m ( to 3 significant figures )
Related Questions
Write an exponential growth model for each situation.
1. initial value: 2,000
growth rate: 6%
2. initial value: 50
growth rate: 75%
3. initial value: 40
growth rate: 100%
Answers
2) a dog breeder has 50 dogs. By each year he plans to have 75% more dogs
3) a company has 40 stores and plans to expand by 100% each year
What is 21 dimes to go 30 dimes
Answers
Answer:
Do a quick conversion: 1 dimes = 0.1 dollars using the online calculator for metric conversions. Check the chart for more details. ... Convert dime to dollar - Conversion of Measurement Units ... 30 dime to dollar = 3 dollar. 40 dime to ... You can do the reverse unit conversion from dollar to dime, or enter any two units below: ...
Step-by-step explanation:
Not an answer but an explanation. Hope this helped :)
HELP!!!!!!!If a 0.27 cm long crystal appears to be 13.5 cm long under a
microscope, what is the power of the microscope?
Answers
Answer:
50 times magnification
Step-by-step explanation:
13.5/0.27
Help this is due tonight.
What is 4x + 3y = -20 and x - 3y = -20
PLZ HELP
Answers
Answer: y= - 4/3 x - 20/3
answer in scientific notation.
4,672,000
Answers
Answer:
4.672 × 10⁶
Step-by-step explanation:
In slope-intercept form what is m=-2, b=8/5
Answers
Answer:
y = -2x + 8/5
Step-by-step explanation:
Triangle Sum Theorem
Find the value of x and the angle measures.
x+23°
F
x+210
X+61°
N
Answers
The points (2, 3) and (3, 6) fall on a particular line. What is its equation in slope-intercept
form?
Write your answer using integers, proper fractions, and improper fractions in simplest form.
Answers
Answer:
y=3x-3
Step-by-step explanation:
insert the first point into y=mx+b
3=2m+b
----------------
Do it again with the other point
6=3m+b
-------------
Now put both equations in a system of equations
3=2m+b
6=3m+b
solve for m and b
m=3 and b=-3
y=3x-3
m=slope
b=y-intercept
Some help me it’s timed
Answers
Answer:
43 m. Perimeter is all the sides added together.
Find the number of real-number solutions of the equation.
x2 + 10 = 2
A. two solutions
B. one solution
C. no solutions
D. infinitely many solutions
Answers
Answer: A
Step-by-step explanation:
Take the root of both sides and solve.
Answer:
A
Step-by-step explanation:
It just is
what is th answer to
Find the Area: R= 8cm
Answers
Answer:
64 π ( c m ) ^2
Step-by-step explanation:
When you cut a pyramid straight up and down, what shape is your cross section?
Answers
Answer:
The cross section of a pyramid that is perpendicular to the base will be a triangle.
Step-by-step explanation:
Can someone tell me which equation this is
1. f(x)= 1/4x +4
2. y=1/2x +4
3. f(x)=-2/3 +4
Answers
Answer:
#3
Step-by-step explanation:
The line follows an inverted slope format, indicated by -2/3. Or down 2, and 3 to the right after going up by 4, creating the line. The other equations would flip the line horizontally because of a positive slope.
PLS HELP ME AND MY TEACHER ARE ON A 1 ON 1 CALL HELP ASAP
Answers
Answer:
I'm confused because...
Step-by-step explanation:
The area of the triangle is 117.
So the surface area of the pyramid is 701.168.
Can you help me with these two? Sorry!
Answers
Answer:
3. second
4. first
Step-by-step explanation:
4) A it’s the first one
Hope this helps :)
A car travels 80 millimetres in 2 1/2 hours . What is it speed in kilometres per hour
Answers
Answer:
32 Kilometers
Step-by-step explanation:
A Car travels 80 Kilometers in 2 and Half hours.
1 Hour =60 minutes, 2 & Half hours= 2.5*60= 150 minutes
Kilometers travelled by Car in a hour= 80/150*60= 32 Kilometers
a belt and a wallet cost $42.7 belts and 4 wallets cost $213.If the cost of a belt is $x and the cost of a wallet is $y, form two linear equations in x and y and solve them to find the cost of each item
Answers
hope it helps yah T-T
cost of a wallet = y
Then, system of equations would be:
x + y = 42
7x + 4y = 213
Multiply 1st equation by 4,
4x + 4y = 168
Substitute it from 2nd equation,
3x = 45
x = 15
Now, substitute it in 1st equation,
15 + y = 42
y = 42 - 15 = 27
In short, Belt costs $15 and wallet costs $27
What’s equivalent to 5(2x+6)
Answers
Answer:
5(6+2x)
Step-by-step explanation:
plz help i will give brainliest
Answers
Answer:
1. [tex]y=\frac{2}{3}x-2[/tex]
2. [tex]y=\frac{-5}{4}x+5[/tex]
Step-by-step explanation:
all you are doing is solving for "y"
Answer:
ans 1. -2x = -6-3y
-2x = 9y
xy = -2/9
ans 2. 5x = 20 - 4y
5x = 16y
xy = 5/16
I hope it helps....
11. What number is 30% of 12? What are you going to solve?
a. rate
b. percentage
c. base
d. decimal
Answers
Answer:
3.6 D. decimal
Step-by-step explanation:
I need help with #6 please help if you can
Answers
Answer:
Please find attached
Step-by-step explanation:
Answer:
65
Step-by-step explanation:
2x + 25 + 25 = 180
2x + 50 = 180
2x = 180 - 50
2x = 130
2x / 2 = 130 / 2
x = 65
The curve formed by a quadratic equation is called a...?
Answers
Answer: The curve formed by a quadratic equation is called a PARABOLA
Step-by-step explanation:
Answer:
Parabola
Step-by-step explanation:
I need to know X for 8 and 10 if u feel like it. PLS
Answers
Answer:
8) x=9
10) 23 degrees
Step-by-step explanation:
8) vertical angles are congruent to each other so we can set the expressions as such and solve:
7x + 3 = 10x - 24
3 = 3x - 24
27 = 3x
9 = x
10) since the angles are complementary they equal 90 degrees, so we can set the expression like this and solve for x:
12x + 7 + 6x - 7 = 90
18x + 7 - 7 = 90
18x = 90
x = 5
now we plug it back into the expression equivalent to the measure of angle O:
6(5) -7
30 - 7
23 degrees
how much feet is in a mile
Answers
Answer:
5280
Step-by-step explanation:
Answer:
There are 5,280 feet in a mile.
Please help me everytime I post this no one helps :( and I need this done soon
Answers
Answer:
Its should be 1 because the graph shows you thats its 1
May someone please help me with these 4 questions? That is all i ask of you.
Answers
Answer:
Step-by-step explanation:
7: Area=77km^2
8: Not sure I think Area=77cm^2
9: Area=56m^2
10: Area=43.51km^2
Im not too sure of this problem but I hope this helps
help me solve for t please
Answers
Answer:
t = 1/3
Step-by-step explanation:
for this problem we have two different shapes, what we need to do is find out the proportional relationship between the two to solve for t, lets take one of the measurements from the smaller shape, we will go with... JK at 5
now all we need to do is divide that by the larger shapes same side, in this case that would be RP at 22.5, heres what that looks like so far
5 / 22.5 = 0.2-> (the two goes on forever, normally this is represented by a line above the infinite number, this is what they call a Repeating Decimal)
ok, so now that we have the rate of change between the two shapes figured out, now we just make the same change to the last side from the same side on the first shape, wich is LK to QR as shown
1.5 * 0.2-> = 0.3->
and if 0.3 is = to 1/3, so t = 1/3
i hope this helped you out, im sorry if im a little late lol, make note that all of this can be applied to similar situations, just figure out the change(s) that happened from one shape to the other, and make that same change on the unknown side or area
take care :D
I NEED HELP OW RN rn please
Answers
Answer:
(4,10)
Step-by-step explanation:
Well, you just count each unit coming from the x-axis up and then do the same for the y axis going to the right. You can also see that the graph is counting by 2 if you look at the "O" coordinate
The Hu family goes out for lunch, and the price of the meal is $41. The sales tax on the meal is 7%, and the family also leaves a 20% tip on the pre-tax amount. What is the total cost of the meal?
Answers
Answer:
hey i hope u are having a wonderful day its gonna be ok
here is the answer:
In circle O, chords AC and BD intersect at E. If MCD= 120 and MAB=100, what is BEC?
Answers
Answer:
D. 70°Step-by-step explanation:
∠BEC is supplementary with ∠BEA
Find the measure of ∠BEA
m∠BEA = 1/2(mCD + mAB)m∠BEA = 1/2(120° + 100°) = 110°Supplementary angles sum to 180°
m∠BEC + m∠BEA = 180°m∠BEC = 180° - 110° = 70°Correct choice is D