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All Questions
+0
230466 Questions
0
291
1
Manipulation problem
Let $a,$ $b,$ $c$ be positive real numbers such that \[\frac{1}{a} + \frac{1}{b} + \frac{1}{c} = 1.\]Simplify \[\left( 1 + \frac{a}{b} \right) \left( 1 + \frac{b}{c} \right) \left( 1 + \frac{c}{a} \right) \left( \frac{1}{a + bc} + \frac{1}{b + ac} + \frac{1}{c
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Guest
Feb 7, 2021
0
373
1
algebra
A 1 km long train travelling at a speed of 60km/h enter a tunnel 1km long. What time will the train take to come out of the tunnel fully.
asinus
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Guest
Feb 7, 2021
0
230
0
Find the measures of the exterior angles on following polygons
-triangle
-quadrilateral
-pentagon
-octagon
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Guest
Feb 7, 2021
0
356
1
word problem
Jasmine buys 3 T-Shirts and 3 Hats for $\$11.25$. The next day, he buys 4 T-Shirts and 2 Hats for $\$10$. How much does each T-Shirt and each Hat cost? Write a system of equations that can be used to solve the problem. Then solve the problem.
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Guest
Feb 7, 2021
0
492
1
average speed
Jan walks 2 miles at a constant rate of 3 miles per hour and then runs 1 mile at a constant rate of 8 miles per hour.(a) What is Jan’s average speed for the entire trip?
(b) Is the average speed in part (a) equal to the average of Jan’s two speeds?
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Guest
Feb 7, 2021
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524
2
+73
|> |_ [- /-\ $ [- |-| [- |_ |>
The equation $(x - 7)^2 + (y + 13)^2 = 12$ represents a circle. What is its radius?
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qwertyytrewq
Feb 7, 2021
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271
1
composite shape
What is the area of the following composite shape? Show your work.
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Guest
Feb 7, 2021
0
504
2
+195
Help
Find the distance between the points $(0,-8)$ and $(2,-5).$
A circle centered at $(0,-8)$ passes through the point $(2,-5).$ Find the equation of the circle. Write your equation in the form "$(x - h)^2 + (y - k)^2 = r^2$".
<
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QuestionMachine
Feb 7, 2021
0
417
1
trig
In triangle LMN, we have angle M = 90, MN = 2, and LM = sqrt(19). What is sin L?
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Guest
Feb 7, 2021
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326
0
+138
IB Stats Prob Density
I dont really know how to do this kinda question so any help is appreciated!
SpaceTsunaml
Feb 7, 2021
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286
1
+195
helpitty helpitty help!
Find the center of the circle whose equation is \[(x + 10)^2 + (y - 7)^2 = 65.\]
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QuestionMachine
Feb 7, 2021
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458
1
pls help
There are red and green apples in a crate.There are 60 green apples in the crate.
The ratio of the number of red apples to green apples is 1:5
Georgia puts in some more red apples into the crate.
The ratio of the number of red apples to green apples
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Guest
Feb 7, 2021
0
454
1
sequence
The sequence 54675, 18225, 6075, 2025, 675, ... is made by repeatedly dividing by 3. How many integers are in this sequence?
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Guest
Feb 7, 2021
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335
1
angle bisectors
In triangle ABC angle bisectors AD, BE, and CF meet at I. If DI = 3, BD = 4, and BI = 5, then compute the area of triangle ABC.
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Guest
Feb 7, 2021
0
271
1
+195
pleeez help
Find the equation of the circle centered at $(1,-4)$ with radius 3. Write your equation in the form "$(x - h)^2 + (y - k)^2 = r^2$" .
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QuestionMachine
Feb 7, 2021
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331
0
hlp
https://vle.mathswatch.co.uk/images/questions/question16623.png
Guest
Feb 7, 2021
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773
3
Power Meassurement
A mobile base station in an urban environment has a power measurement of 25 µW at 225 m. If the propagation follows an inverse 4th-power law, assuming a distance of 0.9 km from the base station, what would be a reasonable power value,
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Guest
Feb 7, 2021
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2
2957
1
Sampling Theorem
An analogue sensor has a bandwidth which extends from very low frequencies up to a maximum of 14.5 kHz. Using the Sampling Theorem, what is the minimum sampling rate (number of samples per second) required to convert the sensor signal into a digital
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Guest
Feb 7, 2021
-1
393
2
+328
The ice cream parlor
The newly opened ice-cream parlor has an exotic smoothie-making machine. Thereare five flavors — vanilla, mango, chocolate, raspberry, and lime, and you would picktwo of those five flavors, and the smoothie will be automatically made for you (twoscopes
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Potatobird
Feb 7, 2021
0
467
1
hyperbola
How many points of the form (x,y), where both coordinates are positive integers, lie below the graph of the hyperbola xy=30?
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Guest
Feb 7, 2021
0
1
1834
6
A town has a population of 12000 and grows at 3.5% every year. What will be the population after 7 years, to the nearest whole number?
A town has a population of 12000 and grows at 3.5% every year. What will be the population after 7 years, to the nearest whole number?
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Guest
Feb 7, 2021
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409
1
line
Find an equation of the line passing through the pair of points (4.9) and (3,5). Write the equation in the form AX + By = C.
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Guest
Feb 7, 2021
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387
1
inverse function
Let
f(x) = k(x) if x > 3
f(x) = (x - 3)^2 + 3 if x <= 3
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Guest
Feb 7, 2021
0
442
2
help
On Father's Day, Diana wanted to buy a shirt and a tie for her father. 4 ties and 5 shirts cost $375. A shirt cost $12 more than a tie. What is the cost of a tie?
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Guest
Feb 7, 2021
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