Recent questions tagged calculator

$\begin{pmatrix}\large\frac{xy^n}{(xy)^{2n}} \end{pmatrix}^{2n}$ if $x=-2, \; y=3$ and $n=-1$

asked Dec 2, 2019 by priyanka.clay6

1 answer

Evaluate : $\large\frac{3^5 \times 3^{-2}}{(3^{-3})^2}$

asked Dec 2, 2019 by priyanka.clay6

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The points of intersection of $f(x)=2x^2+4x-11$ and $g(x)=-3x+4$ is

asked Dec 2, 2019 by priyanka.clay6

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$\Delta OAB$ is isosceles with $OA=OB$ and $AB$ is parallel to $CD$ and the height of the $\Delta OCD$ is $3$. The area of the $\Delta OAB$ is

asked Dec 2, 2019 by priyanka.clay6

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What is the value of $'b'$, so that the sequence $2b-1, \;b+2,\;2b+1$ forms an arithmetic progression ?

asked Dec 2, 2019 by priyanka.clay6

1 answer

If the distance between a 13 feet ladder and a vertical wall is 5 feet along the ground, how high can a person climb if the ladder is inclined against the wall ?

asked Dec 2, 2019 by priyanka.clay6

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What is the area of the parallelogram shown in the figure below ?

asked Dec 2, 2019 by priyanka.clay6

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Solve for $r : \;27^{6-r}=9^{r-1}$

asked Dec 2, 2019 by priyanka.clay6

1 answer

The probability that Juan does his math home work tonight is $\large\frac{2}{5} $ and Nicole does her homework is $\large\frac{9}{10}$ and that Amy does her homework is $\large\frac{7}{9}$ QUESTION : What is the probability that at least one of them does the homework ?

asked Dec 2, 2019 by priyanka.clay6

1 answer

The probability that Juan does his math home work tonight is $\large\frac{2}{5} $ and Nicole does her homework is $\large\frac{9}{10}$ and that Amy does her homework is $\large\frac{7}{9}$ What is the probability that none of them do their homework ?

asked Dec 1, 2019 by priyanka.clay6

1 answer

Simplify $\large\frac{x^{-3}}{2y^3}(\large\frac{1}{xy})^{-3}$

asked Dec 1, 2019 by priyanka.clay6

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Simplify $\large\frac{2}{(x-1)^2} - \large\frac{2}{(1-x^2)}$

asked Dec 1, 2019 by priyanka.clay6

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Catherine is twice as old as her daughter. Twelve years ago she was three times as old as her daughter. Then the age of Catherine is

asked Dec 1, 2019 by priyanka.clay6

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The volume of a sphere whose surface area equals its volume is

asked Dec 1, 2019 by priyanka.clay6

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A gum ball machine contains 40 blue gum balls, 25 red gum balls, 18 green gum balls and 30 purple gum balls. What is the probability that you get a red gum ball ?

asked Dec 1, 2019 by priyanka.clay6

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If $(x-1)^x = 1$ and $x \neq 1$, then all the possible values of $x$ are

asked Dec 1, 2019 by priyanka.clay6

1 answer

Jack buys several articles for $'n'$ costs per dozen and his selling price is $\large\frac{n}{9}$ cent per article. What is the profit in cents on each article ?

asked Dec 1, 2019 by priyanka.clay6

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If $f(y)=\tan y+ \cot y$, then the value of $f(\large\frac{\pi}{4})$ is

asked Dec 1, 2019 by priyanka.clay6

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Which of the following is the graph of a line perpendicular to the line defined by the equation $2x+5y=10 ?$

asked Dec 1, 2019 by priyanka.clay6

1 answer

The bar graph below shows the preferred breakfast for 40 students belonging to class $IX$. The number of students who prefer pancakes as a percentage of the total number of students is

asked Dec 1, 2019 by priyanka.clay6

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Michelle had a kite and he wanted to fly from his garden. The kite is shaped as shown in the figure. What can be the length of the line segment AE ?

asked Nov 28, 2019 by priyanka.clay6

1 answer

In the fig. $\angle{PQR} = 100^{\circ}$ where $P, Q $ and $R $ are points on the circle with center $O$. Find $\angle{OPR}$

asked Nov 28, 2019 by priyanka.clay6

1 answer

Two circles o radii 5 cm and 3 cm and centres A and B touch internally. If the perpendicular bisector of segment AB meets the bigger circle in P and Q. Find the length of PQ.

asked Nov 28, 2019 by priyanka.clay6

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The value of $\large(\frac{729}{512})^{-2/3}$

asked Nov 28, 2019 by priyanka.clay6

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Which of the following expressions is equivalent to $(6+5i)^3$

asked Nov 28, 2019 by priyanka.clay6

1 answer

asked Nov 28, 2019 by priyanka.clay6

1 answer

A plumber charges a one-time site visit fee to evaluate a potential job. If he accepts the job, he charges an hourly rate plus the cost of any materials needed to complete the job. He also charges for tax, only on the cost of the materials. If the cost of completing a job that takes $'x'$ hours is given by the function $c(x) = 50x + 1.25 (83.5) + 75$, then the term $1.25(83.5 )$ represents

asked Nov 28, 2019 by priyanka.clay6

1 answer

The simplified expression of $(3x^4+x^3-12)+(x^4-x^3+x^2-6)$ is

asked Nov 28, 2019 by priyanka.clay6

1 answer

Ryan has a bag containing 12 marbles. 4 are red, 4 are blue and 4 are yellow. What is the probability of Ryan drawing out of the bag first a blue marble and then a yellow, if he doesn't replace the first marble he drew ?

asked Nov 28, 2019 by priyanka.clay6

1 answer

A scientist is doing a study to determine the typical levels of carbon monoxide in the air of automotive garages. She measures the air quality at 8 different garages and gets the following result : 13 ppm, 26 ppm, 4 ppm, 36 ppm, 12 ppm, 19 ppm, 5 ppm, and 9 ppm. What is the mean of her data set ?

asked Nov 28, 2019 by priyanka.clay6

1 answer

A building is to be built on a lot that measures 80 m by 60 m. A lawn of uniform width, equal to the area of the building, must surround it. How wide is the strip of lawn.

asked Nov 28, 2019 by priyanka.clay6

1 answer