Answer:
1.6 hours
Step-by-step explanation:
The two trains will be (75+85)=160 miles apart after each hour.
Therefore the time taken for the trains to be 256 miles apart would be 256/160 hours = 1.6 hours.
A car uses a litre of petrol to travel 4km. How many litres will it use to travel 32 kilometres.
Given that,
A car uses a litre of petrol to travel 4 km.
To find,
How many litres will it use to travel 32 kilometres.
Solution,
We have,
1 litre = 4 km
or
1 km = (1/4) litre
Let it will use x litres to travel 32 km.
32 km = (32/4) litres
= 8 litres
Hence, 8 litres it will use to travel 32 km.
(c) There are seven days in a week. How many of them start with the
letter 'T? What fractions of the days start with the letter 'T’?
Step-by-step explanation:
No of days in 1 week = 7
No. of days starting with T letter = 2
Now
Fraction of the days starting with the letter T
= 2 / 7
Hope it will help :)
Find the component form and the magnitude of the vector v. Exact number, no deciment
Please help I try 7 times but it still wrong
Answer:
[tex]\sqrt{13}[/tex] = 3.6
Step-by-step explanation:
to find the magnitude of a vector the equation is
|v| = [tex]\sqrt{x component ^{2} + y component^{2} }[/tex]
v = [tex]\sqrt{9+4}[/tex] = [tex]\sqrt{13}[/tex]
Answer:
Step-by-step explanation:
Component form : (3 , -2)
Magnitude = [tex]\sqrt{3^{2}+ (-2)^{2}} \\[/tex]
[tex]= \sqrt{9+4}\\\\= \sqrt{13}[/tex]
The number of dogs compared to the number of cats owned by the residents of an apartment complex is represented by the model below.
1 cat and 6 dogs
the ratios is dogs to cats.
Answer:
I believe your asking for the ratio of dogs to cats. Your ratio would be 6:1 and your ratio for cats to dogs is 1:6 Hope it helps.
Someone please help me
Answer:
y = -x + 9
Step-by-step explanation:
Since the line is going down, you can safely assume that it is a negative slope function. The y-intercept is at (0, 9), so your final slope function should be y = -x + 9.
The difference between 16.03 and 7.385 is …….
SOMEONEEEEE PLEASE HELPPPPP
Answer:
D: route 4
Step-by-step explanation:
route 4 is 1 hour and 15 minutes while every other is greater than 1 hour and 15 mins
Answer:
Route 4
it will take 1 hr 15 min
Step-by-step explanation:
WORTH 30 POINTS PLS HELP!
On a windy morning, a hot air balloon starts rising and flying away from the top of a hill. The altitude, h, in feet, of the balloon x hours after starting its ascent from the hill, can be modeled by the function:
Part A: What is the y-intercept for this function? What does the y-intercept represent in the given situation? Use your equation to explain how you found your answer.
h(x)=-16x2+64x+80
Answer:
The y-intercept is y = 80feet. The initial height of the balloon is 80feet.
Step-by-step explanation:
[tex]h(x)=-16x^2+64x+80[/tex]
The y-intercept of the function happens when the x-value = 0. So let's plugin x=0 into the function:
[tex]h(x)=-16x^2+64x+80\\h(x)=-16(0)^2+64(0)+80\\h(x)=80[/tex]
The y-intercept is y = 80feet
x represents the number of hours after starting its ascent from the hill, so x = 0hr means when the balloon is just starting to ascent. At the start of the ascent, the balloon has an altitude of 80feet. The initial height of the balloon is 80feet.
The y-intercept is y = 80feet.
The initial height of the balloon is 80feet.
Calculation of the y-intercept and initial height:Since the equation is [tex]h(x)=-16x^2+64x+80[/tex]
So here x = 0
So
[tex]h(x)=-16(0)^2+64(0)+80[/tex]
= 80
Here, The y-intercept is y = 80feet
Also,
x means the number of hours after starting its ascent from the hill
learn more about intercept here: https://brainly.com/question/15546484
If x = 7 and y = 4, then x + 2y =
Given that if x = 7 and y = 4, the value of x + 2y = 15
Given the following:
x = 7
y = 4
Required:
Find the value of x + 2y.
Therefore, substitute x = 7 and y = 4 into the algebraic expression, x + 2y.
Thus, plug in the values into the expression:(7) + 2(4) = 7 + 8
x + 2y = 15
Therefore, given that if x = 7 and y = 4, the value of x + 2y = 15
Learn more about algebraic expressions on:
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please help me 11.3 + 8.97
Answer:
20.27
Step-by-step explanation:
Answer:
20.27
Step-by-step explanation:
which expression is equivalent to 3(7v)
Help pls number 1.......
Answer:
the answer is 0.3
Step-by-step explanation:
this is because 7 2/5 is equal to 2.8 then if you add all of the number together you will get 24.7 meaning that if you add 0.3 to that you will have your answer of 25
pls help me!! thank you!!
Full working out shown from step 1 to last.
follow it and you get 24 square feet as final answer. Good luck in other questions!!!
A 8 − 4π
B. 8 - 8π
C. 4π − 8
D 8π − 8
E 16π - 8
Please tell me how to do this
Answer:
4.56637
17.13274
4.56637
17.13274
42.26548
Step-by-step explanation:
math
The ratio of wins to losses for the spartan football team is 3:5. If this trend continues and they play a total of 16 games, how many can they expect to win?
Answer:
10 games
Step-by-step explanation:
The team can expect to win 6 matches.
What is ratio?A ratio is a way to show a relationship or compare two numbers of the same kind. We use ratios to compare things of the same type.
Given that, The ratio of wins to losses for the spartan football team is 3:5. and this trend continues, they play a total of 16 games,
Let they won 3k games and loose 5k games.
Then,
3k+5k = 16
8k = 16
k = 2
Therefore, they lose 5·2 = 10 matches and won 3·2 = 6 matches.
Hence, the team can expect to win 6 matches.
For more references on ratios, click;
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Which of the following could be the graph of the equation y= -2x + 5? How do you know??(plz answer!!)
Answer:
The answer is c.
Step-by-step explanation:
This is because the slope is a negative, and since letter a, has a positive slope, it's out of the picture. Just by the looks of b, you can tell that the why intercept isn't 5. It looks like its y-intercept is 0. Letter d, also doesn't have a positive y-intercept so it's also out of the picture. Which leaves letter c. It has a positive slope and it looks like it has 5 as a y-intercept.
Miss Adams tested three cameras last weekend. The table below shows the number of pictures
taken and time it took.
camera 1
camera 2
camera 3
Number of pics
30
72
21
Time in sec.
5
8
3
What is the unit rate for each camera.
pics per second
Cam 1
Cam 2
Cam 3
6
9
7
Which camera was the fastest?
I
The respective unit rates are 6,9,7
What is the unit rate?Unit rate is the ratio of two different units, with denominator as 1. For example, kilometer/hour, meter/sec, miles/hour, salary/month, etc. Arithmetic is probably the most basic and ancient branch of mathematics and is quite commonly used in our day-to-day life.
Given here: Cam 1 clicks 30 pics in 5 secs
∴ Unit rate of Cam 1= 30/5
=6 pics/sec
Similarly we can find
Unit rate of Cam 2=9 pics/sec
Unit rate of Cam 3= 7 pics/sec
Hence, The respective unit rates are 6,9,7
Learn more about unit rate here:
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In the number 99, how many times larger is the value of the digit in the tens place than the value of the digit in the ones place?
Answer:
zero times
Step-by-step explanation:
9-9=0
Help because this is dificulty to me
Answer:
false false true false ez
Which of the following is equivalent to (mn)³?
a. 3mn
b. m³n
c. mn³
d. m³n³
Answer:
Step-by-step explanation:
d is correct
What are the convection currents in Earth's mantle believed to be responsible for?
ocean currents
climatic changes
uneven surface heating
tectonic plate movements
Answer:
tectonic plate movements
Step-by-step explanation:
what happens to an angles measure when the angle is rotated. i will brainlist
Can someone help need it in less then 30 minutes
Answer:
$48.22
Step-by-step explanation:
I'm pretty sure you just multiply the 1627.4 by 3%
1627.40*.03=48.822 = $48.22
Two buildings are facing each other on a road of width 12 metre . From the top of the first building, which is 10 metre high , the angle of elevation of the top of the second is found to be 60°. What is the height of the second building ?
So easy question
Can u people solve ?
I dont think so
Answer:
[tex]\displaystyle 10 + 12\sqrt{3}[/tex] metres
Step-by-step explanation:
You are finding the height of the building with an angle of elevation, therefore we need to solve for EC to add it to BA [10 metres] and use TRIGONOMETRIC RATIOS to arrive at our conclusion. Just in case you have forgotten what they were, here they are:
[tex]\displaystyle \frac{OPPOSITE}{HYPOTENUSE} = sin\:θ \\ \frac{ADJACENT}{HYPOTENUSE} = cos\:θ \\ \frac{OPPOSITE}{ADJACENT} = tan\:θ \\ \frac{HYPOTENUSE}{ADJACENT} = sec\:θ \\ \frac{HYPOTENUSE}{OPPOSITE} = csc\:θ \\ \frac{ADJACENT}{OPPOSITE} = cot\:θ[/tex]
We can now solve for EC:
[tex]\displaystyle cot\:60 = \frac{12}{EC} → ECcot\:60 = 12 \\ \\ \frac{ECcot\:60}{cot\:60} = \frac{12}{cot\:60} → 12\sqrt{3} = EC[/tex]
OR
[tex]\displaystyle tan\:60 = \frac{EC}{12} → 12tan\:60 = EC → 12\sqrt{3} = EC[/tex]
Now that you have solved for EC, you can now add it to your original 10 metres to get [tex]\displaystyle 10 + 12\sqrt{3}[/tex] metres. As a decimal, you would get [tex]\displaystyle 30,78460969...[/tex] metres. You can go ahead and round this off if necessary.
** The reason why the cotangent [or tangent] ratio was used was because EA is equivalent to DB by the definition of a rectangle. It has two pairs of parallel and congruent sides with four right angles. Plus, that is the adjacent side of the triangle, while EC is the opposite side of the triangle, so we knew our ratios were correct.
I am joyous to assist you at any time.
The ratio of flowers the rose bushes bloom is 5 red for every 7 yellow. If there are 105 yellow rose blooms, about how many red rose blooms are there?
Answer:
147
Step-by-step explanation:
if you divide 105 by 5, you get 21. Multiply 7 by 21 to get your answer.
-4=16x what would u do to solve this equation? like add -4 or add 16?
Rhonda is drawing a 3-inch square inside an isosceles triangle with two side lengths measuring 7 inches and 14 inches. Which of the following is the length of the third side of the triangle?
A) 7 in.
B) 9 in.
C) 12 in.
D) 14 in.
Answer:
7
Step-by-step explanation:
I just need to type more or my answer gets auto delete but yeah it is 7
Which polynomial is represented by the algebra tiles?
x2 – x – 4 x2 – x + 4 3x2 – 5x + 8 3x2 – 5x – 8
Answer:
x2 – x + 4
Step-by-step explanation:
Just took the test on edg
All radical expressions that are equivalent to 3 2/5
Answer:
15
Step-by-step explanation:
√15 (3√5)^2 3√5^2 3√10
Please help me on this questionnnnnn
n + 5 = 4 + 4
n + 5 = 8
n = 3
-- the answer is the third choice.