Answer:
695.87 Hz
Step-by-step explanation:
Using the equation for Doppler shift, the frequency of the apparent sound is f' = f(v ± v')/(v ± v") where f = frequency of sound emitted by the plane's engine = 485 Hz, v = speed of sound in air = 330 m/s, v' = speed of crowd(detector) = 0 m/s (since the crowd are stationary) and v" = speed of plane(source) = 100 m/s
So, f' = f(v ± v')/(v ± v")
f' = f(v ± 0)/(v ± v")
f' = fv/(v ± v")
Since the source moves towards the detector, we use a minus a minus sign in the denominator to get a shift upwards in frequency since a shift upwards means the objects are moving closer to each other.
So,
f' = fv/(v - v")
Substituting the values of the variables into the equation, we have
f' = 485 Hz × 330 m/s/(330 m/s - 100 m/s)
f' = 160050 Hzm/s ÷ 230 m/s
f' = 695.87 Hz
What is the median of the following data set?
{5, 2, 9, 7,4}
A.5
B.7
C.8
D.9
Answer:
5
Step-by-step explanation:
The median of all the answers equal up to 5.
A rectangular flower garden in Samantha's backyard has 300 feet around its edge. The width of the garden is 70 feet.
Graph a direct variation function that goes through the point (-2, -6). what is the slope
Answer:
The slope is 3.
Step-by-step explanation:
A direct variation function will always go through the origin point (0, 0).
Therefore, we have the two points (0, 0) and (-2, -6).
We can use the slope formula to find the slope:
[tex]\displaystyle m=\frac{y_2-y_1}{x_2-x_1}[/tex]
Substitute and evaluate:
[tex]\displaystyle m=\frac{0-(-6)}{0-(-2)}=\frac{6}{2}=3[/tex]
Therefore, the slope of the function is 3.
To graph, simply plot (0, 0) and (-2, -6) and draw a line connecting them. This is shown below.
Answer:
y = 2/3x - 3
Slope: 2/3x
Step-by-step explanation:
Slope: 2/3x
y- intercept: (0,-3)
once it goes down it'll be -2/-3x which will go to through (-2,-6) as soon as it goes down from the y-intercept.
equation: y = 2/3x - 3
A teacher changed to grading from 50 points + 5 for each correct answer to 50 points + 7 for each correct answer. What would change: the slope. The y intercept, both the slope and the y intercept or nothing
Answer:
The slope
Step-by-step explanation:
Given that:
Initial grading ; For each correct answer : 50 points + 5
New grading ; For each correct answer = 50 + 7 points
The reading coukd be expressed in slope intercept form of an equation as :
Initial grading :
y = 50 + 5x
New grading :
y = 50 + 7x
y = total score ; x = number of correct answers
The change in y per unit change in x which is the slope, is the only difference in the two equations, the intercept (50) stays the same.
Therefore, only the slope changes.
What is The difference of 3-3÷2
Answer:
1.5
Step-by-step explanation:
Answer:
1.5
Step-by-step explanation:
Please help no link as answers
Step-by-step explanation:
You can imagine this figure as a rectangle and cube
If you want volume of this irregular figure than you have to do it like this:
V(figure)= V(rectangle)+ V(cube)
V(figure)= a*b*c+ a³
V(figure)= 4*3*(I don't see dimension on the left)+ 3³
V(figure)=12*(I don't see dimension on the left)+ 27
And only you have to to do is to set this dimension which I can't see.
No links or weird answers, please :(
Are all of these graphs functions? Explain why or why not.
Solve 8y - 9 = -3y + 2
Answer:
y=1
Step-by-step explanation:
8y-9=-3y+2
-2
8y-11=-3y
-8y
-11=-11y/-11
Answer:
y=1
Step-by-step explanation:
8y+3y=2+9
11y/11=11/11
y=1
Please I really need help with this
Answer:
x=16
I used Pythagorean theorem.
Step-by-step explanation:
Tell me if you have more questions or want to know how I solved it.
Have a nice day!
and can I maybe have brainliest? Thanks!
find the volume of this shape please helppp
.
[tex] = 1.540 \: {cm}^{3} [/tex]
.
Explain.
Use this formula :
[tex] = \pi \times {r}^{2 } \times t[/tex]
[tex] = \frac{22}{7} \times {( \frac{14}{2} )}^{2} \times 10 \\ [/tex]
[tex] = \frac{22}{7} \times {7}^{2} \times 10 \\ [/tex]
[tex] = \frac{22}{ \cancel7} \times \cancel{49} \times 10 \\ [/tex]
[tex] = 22 \times 7 \times 10[/tex]
[tex] = 154 \times 10[/tex]
[tex] = 1.540 \: {cm}^{3} [/tex]
.
#LearnWithBrainly
gak bisa bahasa inggris :(Worth five points! Will mark the first person who answered with an actual correct answer brainliest and i don't lie about brainliest!! Please no nonsense answers I just want help :(
Triangle ABC is the right triangle.
m∠A = 42°
What is m∠B?
A. 38°
B. 42°
C. 48°
D. 128°
Answer:
C m∠B = 48°
Step-by-step explanation:
The acute angles of a right triangle are complementary which means their sum is 90
m∠A + m∠B = 90
42 + m∠B = 90
m∠B = 48°
what are the components of a proofs in proving that two triangle are congruent?
Please answer it i need now i will follow,br,ainlist,thanks.
Answer:
If two sides and the included angle of one triangle are equal to the corresponding sides and angle of another triangle, the triangles are congruent.
Step-by-step explanation:
24 is what percent of 400?
Answer:
The answer is 6%
Answer:
6%
Step-by-step explanation:
tell me if I’m wrong lol
please help!!No links
Answer:1800
Step-by-step explanation: The larger triangle is double the size of the smaller triangle based on the sides 300->600 and 400->800
State if the three numbers can be the measures of the sides of a triangle.
689
No or Yes
Answer:
Yes
Step-by-step explanation:
6 + 8 = 14 which is bigger than 9 so it is possible
If the two shorter sides add up to a number that is equal to or smaller than the largest side, the triangle is impossible
if a= 3 and b= 4 what would c=
Answer:
5
Step-by-step explanation:
Help me with this question please!
Answer:
24, 21, 15, 12
Step-by-step explanation:
Since x is given in the table, you can find the y-values by plugging each of the x-value into the equation replacing x.
[tex]y=30-3(2)=30-6=24[/tex] [tex](2, 24)[/tex]
[tex]y=30-3(3)=30-9=21[/tex] [tex](3, 21)[/tex]
[tex]y=30-3(5)=30-15=15[/tex] [tex](5, 15)[/tex]
[tex]y=30-3(6)=30-18=12[/tex] [tex](6, 12)[/tex]
9514 1404 393
Answer:
see attached
Step-by-step explanation:
It is convenient to let a spreadsheet or graphing calculator do the repetitive arithmetic.
__
If you want to do it by hand, put the x-value in the equation and do the arithmetic. For example, ...
y = 30-3(2) = 30 -6 = 24 . . . for x=2
answers r
268
201
151
67
67in³
Answer:
we have
volume of sphere =4/3 πr³=1/3×π×4³=67.02=67in³ is your answer.
pls pls pls help me giving brainlist
Answer:
The first one is a similie
second is a metaphor
Step-by-step explanation:
like ice means like a hatred glare
the hug is a a good thing thats
happens on a bad dat
Answer:
simile
the referee was angry
metaphor
they have a lot of love for each other
Step-by-step explanation:
please mark me branliest
PLEASE HELP! ASAP I WILL GIVE BRAINLIEST
This table represents the monthly fees for checking accounts at two banks.
Which statement is best supported by the information in the table?
The fee at Sunset Bank will always be less than the fee at Oceanview Bank.
The fee at Sunset Bank will be less than the fee at Oceanview Bank only when the checking account balance is less than $200.
The fee at Sunset Bank will be less than the fee at Oceanview Bank only when the checking account balance is more than $200.
The fee at Sunset Bank will always be more than fee at Oceanview Bank.
Answer:
the fee at sunset bank will always be more than fee at Oceanview bank.
Answer:
D
Step-by-step explanation:
i got it correct and go to k-12
Find the missing length. The triangles in each pair are similar.
Answer:
Step-by-step explanation:
This a not so simple ratio problem:
MN is to LN as TN is to UN as MT is to LU
MN/LN = TN/UN = MT/ LU trying to find LU
88 / (? + 32) = (88-56)/32 = 56/?
= 32 / 32 = 56 / ?
1 = 56 / ?
? = 56
88 / (56 +32) = 1 This must be an Isosceles triangle and UT bisects
LN and MN
Which expression is equivalent to 91 + 39?
(A) 13(7 + 39)
(B) 3(30 + 13)
(C) 13(7 + 3)
(D) 7(13 + 6)
Is 9.90 greater than or lesser than 9.9
Answer:
it is equal too.
Step-by-step explanation:
Answer:
it is equal to
Step-by-step explanation:
In triangle ABC, B = 120°, a = 10, c = 18
Find angle C
choices
A. 40°
B. 50°
C. 45°
D. 20°
Answer:
kk
Step-by-step explanation:
NO FILES I WILL MARK YOU IF RIGHT I ASKED THIS FIVE TIMES ALL I GET IS SCAM FILES!!!!!!!!!!!!! PLZZZZZZ HELP
The Sugar Sweet Company will choose from two companies to transport its sugar to market. The first company charges $6500 to rent trucks plus an additional fee of 175.25 for each ton of sugar. The second company charges $5696 to rent trucks plus an additional fee of 225.50 for each ton of sugar.
For what amount of sugar do the two companies charge the same?
What is the cost when the two companies charge the same?
Answer:
14 tons
$3,860.50
Step-by-step explanation:
Let x = the amount of sugar transported.
First company:
The cost is $3157 truck rental plus $50.25 per ton of sugar.
Total cost = 3157 + 50.25x dollars
Second company:
There is no charge for truck rental, but it costs $275.75 per ton of sugar.
The total cost is
275.75x
When the two costs are the same, then
275.75x = 3157 +50.25x
225.5x = 3157
x = 14 tons
The total cost is 275.75*14 = $3,860.50
Which equation does this model represent
Answer:
G.
Step-by-step explanation:
5 + (-9) = -4.
. .
. .....
22. A carton of milk holds 10 cups. A recite
for strawberry milkshakes requires 3/4 of a cup
of milk. How many recipes could you make
with the carton of milk?
Answer:
7
Step-by-step explanation:
Just simply divide 10 with 3/4
[tex]10*\frac{3}{4}\\\\=\frac{15}{2}[/tex]
Now you can't make 7.5 recipes and also You can't make 8 recipes either [if you round up the value].
Now round down the value
the answer is 7
3 − 1 = 5 + 10 = −5 1/2 Check whether the given value of is a solution to the equation. Justify your answer.
Answer:
[tex]x = -5\frac{1}{2}[/tex] is the solution
Step-by-step explanation:
Given
[tex]3x - 1 = 5x + 10[/tex] --- Correct expression
[tex]x = -5\frac{1}{2}[/tex]
Required
Determine if the given solution is correct
To do this, we simply solve for x in the given equation.
So, we have:
[tex]3x - 1 = 5x + 10[/tex]
Collect like terms
[tex]3x - 5x = 1 + 10[/tex]
[tex]-2x = 11[/tex]
Divide both sides by -2
[tex]\frac{-2x}{-2} = \frac{11}{-2}[/tex]
[tex]x = -\frac{11}{2}[/tex]
[tex]x = -5\frac{1}{2}[/tex]
find m the in this screenshot
Answer:
[tex]x + x + 4 + 3x - 9 =90 \\ 5x = 95 \\ x = 19 \\ \\ gjh = 19 + 4 = 23[/tex]
Can someone please help me with math.
Answer:
9. C. 35 + 0.12x = 44.36
10. C. The system has no solution since the second equation is equal to 0
11. A. 32
Step-by-step explanation:
9. The Hill family drove for 78 miles
The rental agency chargers a weekend fee of $35.00 and 12 cents per mile
Convert cents to dollars
1 cent = 0.01 dollar
∴, 12 cent = 12 x 0.01 = 0.12 dollar
Therefore, total bill amount = 35 + 0.12 per mile
Let "x" be the number of miles driven
Final bill was $ 44.36
44.36 = 35 + 0.12x
0.12x = 44.36 - 35
0.12x = 9.36
Divide both sides of the equation by 0.12
x = 78
10. The system of equations is...
The true statement about the given system of equations.
The slope-intercept form of a line is...
Where m is the slope and b is the y-intercept.
We have,...
On comparing these two lines with slope-intercept form, we get...
Since the slopes of the lines are equal but the y-intercepts are different, therefore, the two lines are parallel and the system has no solution.
11. This is an equation Solutions: x=32.
⇒ Value of (Dimes + Quarters) = $ 6.70
or, (0.1 m) + 11.5 - 0.25 m = 6.70
-0.15 m = - 4.8
or, m = 4.8/0.15 = 32
⇒ m = 32