Equation + expression of a variable from the formula - practice problems - page 37 of 41
Number of problems found: 802
- Determine AP
Determine the difference of the arithmetic progression if a3 = 7, and a4 + a5 = 71 - Unknown number 4
I think number. When I divided its square root by its 1/9, I got a number 1. What number am I thinking? - Equation: 3726
Determine the real root of the equation: x^-3: x^-8 = 32 - Four swords
Obelix has three helmets, four swords, and five shields. How many words must you make at the blacksmith forge Metallurgix to be able to walk another 90 days in unique armor?
- Fifth member
Determine the fifth member of the arithmetic progression if the sum of the second and fifth members equals 73 and the difference d = 7. - Chocholate pyramid
How many chocolates are on the third shelf when on the 8th shelf are 41 chocolates on any other shelf? Are seven chocolates more than the previous shelf? - Unknown number 7
Calculate an unknown number whose 12th power, when divided by the 9th power, gets a number 27 times greater than the unknown number. Determine the unknown number. - Circle - AG
Find the coordinates of the circle and its diameter if its equation is: x² + y² - 6x-4y=36 - Equation of circle
Find an equation of the circle with indicated properties: a. center at (-3,5), diameter 20. b. center at origin and diameter 16.
- Chairs
Determine the number of seats in the seventh and ninth rows if the 3rd row has 14 seats and every next row has five more than the previous row. - Bookshelve
Bookshelves with an original price of € 200 twice become cheaper. After the second discount of 15%, the price was € 149.60. Determine how much % becomes cheaper for the first time. - The car
The car traveled the distance between A and B for four hours. If we increase the average by 17 km/h, the car travels this distance an hour earlier. Determine the initial speed of the car and the distance between A and B. - Jam
A jar with jam weighs 800 grams. Jam weighs three times as much as the empty glass. What is the weight of the jam that is in the glass? - Solve equation
Solve equation: [(a²)+3]1/2 + [(a²)-3]1/2 = 5
- Trapezoid
trapezoid ABCD a = 35 m, b=28 m c = 11 m and d = 14 m. How to calculate its area? - The deposit
A deposit has been placed for one year at an annual rate of 4.5%. The amount rose to € 2,612.5 after one year. Find initial deposit. - Blueberries 2
Lenka and Martin collected eight liters of blueberries in two hours. How long will Lenka take to collect blueberries itself if we know that she collects all 2.5 hours less than Martin? - Car and cyclist
The cyclist started from town at a speed of 18 km/h. After 1 hour 30 min started the car from town and caught up with the cyclist in 50 minutes. How fast was a car? - Contract
Eight employees complete the contract for 65 hours. After 17 hours, three employees had to leave for another job. How many more hours will the job on the contract be fulfilled?
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