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Recent questions tagged calculator

If $a^2+b^2=8$ and $(a-b)^2=4$, what value of $ab$ ?

asked Apr 28, 2019 by priyanka.clay6

1 answer

In the figure below, the circle with centre $o$ has $OA = 4$ and $BC =2$, What is the value of $x$? <br><br>

asked Apr 28, 2019 by priyanka.clay6

1 answer

In the figure given below $PT$ and $PQ$ are targets to the circle with centre $o$. Which of the following is equal to $z^{\circ}$ ?

asked Apr 28, 2019 by priyanka.clay6

1 answer

In the figure below, what is the value $a^{\circ}$ ?

asked Apr 28, 2019 by priyanka.clay6

1 answer

At 4.00 AM the temperature was $12^{\circ}$ below zero. By noon it raised to $30^{\circ}$. What was the average hourly increase in temperature ?

asked Apr 28, 2019 by priyanka.clay6

1 answer

Which of the following is not the lowest term of $\frac{3}{4} \times \frac{8}{9} \times \frac{25}{40}$

asked Apr 28, 2019 by priyanka.clay6

1 answer

The ratio of number of math tests Joddy passed to the number he failed is $7:3$. What percent of his math test did he pass ?

asked Apr 27, 2019 by priyanka.clay6

1 answer

If 600 pounds of food can feed 25 pigs for a week ,for how many days will 200 pounds of mash feed 21 pigs ?

asked Apr 27, 2019 by priyanka.clay6

1 answer

What is the average of $2^{15}$ and $2^{25}$ ?

asked Apr 27, 2019 by priyanka.clay6

1 answer

On wednesday 20 of the 25 students in a Math class took a test, and this average score was 85. On Thursday the other 5 students took the test and this average score was 90. What was the average score of the entire class ?

asked Apr 27, 2019 by priyanka.clay6

1 answer

In the xy-plane, the graph of which of the following equation, is a line with slope 3 ?

asked Apr 27, 2019 by priyanka.clay6

1 answer

Mark drove to his office at 60 miles per hour. Returning over the same route, to his home, he encountered heavy traffic and was able to drive at only 40 miles per hour. If the return trip took 1 hour longer, how many miles did he drive each way ?

asked Apr 25, 2019 by priyanka.clay6

1 answer

A jar contains 1600 marbles, and all the red marbles are removed and replaced by equal no. of marbles, all of which are blue or yellow. If the ratio of blue to yellow marbles remain the same, how many additional yellow marbles are there ?

asked Apr 25, 2019 by priyanka.clay6

1 answer

If $x^2 + 3 = 128$, what is the value of $x$ ?

asked Apr 25, 2019 by priyanka.clay6

1 answer

An integer between 10 and 99 is chosen at random. What is the probability that all the digits are even ?

asked Apr 25, 2019 by priyanka.clay6

1 answer

Which of the following is not a point on the graph of $f(x) = x^2 + \dfrac{4}{x^2}$

asked Apr 25, 2019 by priyanka.clay6

1 answer

Given below is a triangle one of the acute angles is $60^{\circ}$. The base of the triangle is given as 15 cm. What is its height ?

asked Apr 25, 2019 by meena.clay6

1 answer

If $x^2-12x=-11$ and $x>1$, then $x = $

asked Apr 24, 2019 by priyanka.clay6

1 answer

The window of a house is in the shape of a square and an equilateral triangle on its side as shown below. The side of the square is 1.5 metres. How much air can enter through this window ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

Percentage error is calculated by subtracting the theoretical value from the actual value, then dividing by the theoretical value, and multiplying by 100. Find the percentage error while measuring the radius of a string using screw gauge whose actual value is given by $0.25\;cm$ but the theoretical value was found to be $0.19\;cm$.

asked Apr 7, 2019 by priyanka.clay6

1 answer

The given system of equation <br> $\qquad \qquad 3x+4y =5; \large\frac{9}{2} $$x +6y=\large\frac{15}{2}$has :

asked Apr 7, 2019 by priyanka.clay6

1 answer

The mode and mean are $26.6 $ and $ 28.1$ respectively in a distribution, then its median is _______

asked Apr 7, 2019 by priyanka.clay6

1 answer

The mean of the following data is $20.6$ , then the value of P is _________

asked Apr 7, 2019 by priyanka.clay6

1 answer

O is the center of a circle of radius 9 cm. A point P at a distance of 41 cm from O. The length of the tangent segment from P to the circle is _________

asked Apr 7, 2019 by priyanka.clay6

1 answer

The bacteria culture was seen to grow exponentially in 5 hours. Initially the count was 10 billion. The growth rate is said to be increasing by $2.5 \%$. What can be the count at the end of 5 hours ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

The table below summarizes the results of $60$ students in a class. What is the probability that the student did not attend the exam ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

The table below summarizes the results of $60$ students in a class. What is the probability that the student passed in the science exam ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

Divide 36 into two parts in such a way that $\frac{1}{5}$ of one part is equal to $\frac{1}{7}$ of the other.

asked Apr 7, 2019 by priyanka.clay6

1 answer

Martha hired a taxi from her work place. The fare is fixed for $ \$5.00$ for 5 miles and a charge of $\$2.50$ is added for every extra mile. Martha traveled a distance of 9 miles on Monday and 8 miles on Tuesday. How much did she pay on the whole ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

Value for $((i^4)^8)^{10}$ is

asked Apr 7, 2019 by priyanka.clay6

1 answer

The solution for $3x^2 - 5x+2=0$ is

asked Apr 7, 2019 by priyanka.clay6

1 answer

$2(5x+8) < 100 - 4x$ implies

asked Apr 7, 2019 by priyanka.clay6

1 answer

The equation of a line that goes through the point $(-1, 3)$ and has a slope of $\frac{1}{3}$ is

asked Apr 7, 2019 by priyanka.clay6

1 answer

Jill has 99 pennies, 25 nickels and 20 quarters. What was the total amount in dollars ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

A spherical metal ball whose radius is $21\; cm$ is melted to make smaller balls each of radii $0.7\; cm$. How many balls can be made from the bigger ball ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

Charlie had a garden in the shape of a triangle. The sides of the garden were 2 miles, 3 miles and 5 miles. The area of the garden is 45 square miles. How far is it from the middle of the five mile long side to the intersection of the other two sides ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

In a laboratory, students were to do an experiment to find the elongation of springs. When one end of the spring is attached to a ceiling with an object of mass $'m'$ kg attached to the other end of the spring, the spring stretches to a length of $l$ centimeter as shown in the equation below. What is the value of $m$ when $l$ is $75$ ? <br> <br>$\qquad \qquad \qquad l = 21 + 2.5 m$

asked Apr 7, 2019 by priyanka.clay6

1 answer

A quality control manager of a factory finds 10 imperfect screws out of every 100 screws produced. At this rate, how many screws will be imperfect if the factory produces 20,000 screws ?

asked Apr 7, 2019 by priyanka.clay6

1 answer

A planetarium is spherical in shape with a diameter of $30\;m$. What can be its volume ?

asked Apr 6, 2019 by priyanka.clay6

1 answer

Allen scripts his show for 10 minutes and makes it available for downloading and streaming. He earns $ \$0.08$ each time his show is downloaded and $\$0.002$ each time it is streaming. Which of the following expression represents the amount in dollars, he earns if the show is downloaded $d$ times and streamed $s$ times?

asked Apr 6, 2019 by priyanka.clay6

1 answer

A jar contains red and white marbles $35 \%$ of the marbles are red. If the average weight of a red marble is $35$ gram, and the average weight of a white marble is $50$ grams. What is the average weight in grams, of all the marbles in the jar ?

asked Apr 3, 2019 by priyanka.clay6

1 answer

What positive number $n$ satisfies the equation <br><br> $\qquad \qquad \qquad \qquad (9)(9)(9)n = \frac{(27)(27)}{n} $

asked Apr 3, 2019 by priyanka.clay6

1 answer

If $f(x) = 25x+25^x$ what is the value of $f (\frac{1}{2})$ ?

asked Apr 2, 2019 by priyanka.clay6

1 answer

Charlie bought a calculator which costs $\$75$ on sale at $5\%$ off. How much did he pay including $5\%$ sales tax.

asked Apr 2, 2019 by priyanka.clay6

1 answer

A jar has 10 marbles, 4 yellow, 2 red and the rest white. What is the probability that a white marble were not removed ?

asked Apr 2, 2019 by priyanka.clay6

1 answer

$4x^2 = 3x+c$ <br>In the equation above, $c$ is a constant. If $x=-1$ is a solution of this equation, what other values of $x$ satisfies the equation ?

asked Apr 2, 2019 by priyanka.clay6

1 answer

If $i =\sqrt{-1}$, what can be the value of $\dfrac{(3+i)(2-i)}{3-i } $ is

asked Apr 2, 2019 by priyanka.clay6

1 answer

If $9 \sqrt{12} - 4\sqrt{27} = n\sqrt{3}$, what is the value of $n$ ?

asked Apr 2, 2019 by priyanka.clay6

1 answer

Given the system of equations below, which of the following could be the value of $a+b$ ?<br> $\qquad \qquad \qquad a^2 - 3b =-9$ <br> $\qquad \qquad \qquad 2a^2 + 5b = 14$

asked Apr 2, 2019 by priyanka.clay6

1 answer

When $y = 2(x-3)(x-4) $ is graphed in the xy plane, what is the $x$-coordinate of the vertex ?

asked Apr 2, 2019 by priyanka.clay6

1 answer

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