Expression of a variable from the formula - practice problems - page 4 of 133
Number of problems found: 2649
- Evaluate complex eq
If z=x+yi and 3x+(3x-y)i=4-6i then z= - An electorate
In an electorate, 3/4 th of the voters are Tamils. Of the remaining 2/3 rd are Muslims, and the others are Sinhalese. If the number of Sinhalese in that electorate is 587, find the number of voters in that electorate. - Coefficient of skewness
For the data set whose Karl Pearson's Coefficient of skewness = -2.25, variance is 16, and Mean is 35, then its median value will be: - A water 2
A water tank is 2m long, 1.9m wide, and 964 mm deep. How much water will it hold? Answer in liters. 2nd question: A tank that is 2.5 m long and 1.5m deep holds 6.75 cubic meters of water. What is its width?
- Lightning strike
In a thunderstorm, the formula M=t/5.3 gives the approximate distance, M, in miles, from a lightning strike if it takes t second to hear the thunder after seeing the lightning. If you are 5.4 miles away from the lightning flash, how long will it take the - Apothem
Find the ratio between the two perimeters, the two areas, and two corresponding apothems of two regular hexagons whose sides are 2-3/4 inches and 4-1/8 inches. - The length 18
The length of a rectangle is three times its width. Suppose the perimeter is 96 cm. Calculate the width of the rectangle. - Write 8
Write an expression for the total cost using the variable x. A bus company charges $35 to rent a bus for the day plus $4.50 for each student. - Which 15
Which two digits need to be interchanged to make the following equation correct? 16+7*2+4-3=12 A) 2 and 4 B) 7 and 4 C) 16 and 2 D) 7 and 3
- Express 71
Express 2 minutes 30 seconds as a fraction of 3/4 hours. - A data
A data set has the sample mean =14 and the sum of the data values=294. How many values are there in the data set? - Work
2/5 of the employees in a company drive to work, 1/3 travel by bus, and the rest walk. Find the fraction of those who walk. - Four bricks
A trolley carrying 4 bricks weighs 16 kg. When 1 brick is taken away, it weighs 13.5 kg. How much does it weigh if 1 brick is in the trolley? - Markdown
February is sale month at the clothing store. All items are marked down 20 percent. If the sale price for a purse is $42, what was the price before the markdown?
- A right triangle
A right triangle has legs with lengths of 24 cm and 21 cm if the length of the hypotenuse, in cm, can be written in the form of 3 sqrt(d), then what is the value of d? - Yiguo
There were an equal number of carrots, tomatoes, and cabbage in the pantry. Yiguo used 49 carrots som, some tomatoes, and some cabbages. There were 3 times as many tomatoes as cabbages left. Sixteen fewer carrots than tomatoes were left. There were 117 ca - Cardinals and robins
Lee saw c cardinals and 5 robins in his yard. Write the expression that shows the number of birds Lee saw in all. - Edmond 2
Edmond bought a new cage for his pet rabbit since he's gotten so big. The area of the old cage's floor was 6 square feet. The area of the new cage's floor is n square feet larger, for a total of 8 square feet. Write expressions that tell this story and fi - General right triangle
In a right triangle, if a =x+34 and b = x and c= 50, then solve for x. Side c is a hypotenuse. Then discuss the case when a or b is a hypotenuse.
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