Equations practice problems - page 89 of 241
Number of problems found: 4808
- Deceleration of car
The car has a speed of 60 km/h and, after a 100 m journey speed of 40 km/h. What is the deceleration of a car if we assume that its movement is constantly slowed down? - Statistical XY file
Year; money spent on advertising; profit (three values each row) 2008 2 12 2009 5 20 2010 7 25 2011 11 26 2012 15 40 1. draw a scatter diagram depicting the data. 2. calculate the Pearson's correlation coefficient. 3. determine the linear regression equat - Inequality: 33081
Write the smallest natural number satisfying the inequality: 5. (2x-1) - Marketing
Year; money spent on advertising; profit 2008 2 12 2009 5 20 2010 7 25 2011 11 26 2012 15 40 1. draw a scatter diagram depicting the data. 2. calculate the Pearson's correlation coefficient. 3. determine the linear regression equation. - Increased 32723
If we subtract its sixth from the number's triple number, we get half of that number increased by 28. What is the number? - One-third 32693
Half of the imaginary number reduced by a quarter of the same number equals one-third of the largest two-digit number. What did the number mean? - Grandmother - money
On a school trip, Šárka received pocket money from her grandmother for small expenses. On the first day, she spent 20% of it and was left with 320 CZK. Calculate the amount of Šárka's pocket money. - Railway embankment
The railway embankment section is an isosceles trapezoid, and the bases' sizes are in the ratio of 5:3. The arms have a length of 5 m, and the embankment height is 4.8 m. Calculate the size of the embankment section area. - Original plan
Gardeners planted 16% more currant bushes than initially planned. In total, they planted x = 435 shrubs. What was the original plan? - Convex lens
The convex lens consists of two spherical segments (dimensions given in mm). Calculate its weight if the density of the glass is 2.5 g/cm³. Dimensions: 60mm in length and width of the upper part 5mm, the width of the lower part 8mm - Fractions: 32541 Solve the following equation with fractions: (5x + 1) / 3 + (17-x) / 2 = (3x + 1) / 8 + 15
- Secondary school
Half the pupils want to study at the secondary school, 1/4 at the apprentice, and 1/6 at the grammar school. Three pupils do not like to learn. How many students are in the class? - Decibel
What percentage of sound intensity increases if the sound intensity level increases by 1 dB? - Savings 32203 Helena had 20% more savings than Jane. They have saved 1804 CZK. How much have Helena and Jane held?
- The difference of AP
Find the difference d in an AP (arithmetic progression) whose 5th term is 18 and 39th term is 120. - Between two
There are regular flights between the two airports 690 km apart. A plane leaves the first airport at 6:30 with an average speed of 60 km/h greater than the second plane, which leaves the second airport at 7:00. The planes always pass each other at 9:00. W - Daughter 31783
When the father was 31, the daughter was eight years old. Now, a father is twice as old as a daughter. How old is her daughter? - Perimeter 31761
Mr. Marek wants to build a circular pond in his garden. He wishes the perimeter of the pond in meters and the area in square meters to be expressed in the same numbers. What is the radius of the pond? - Looking 31641
Nine times the number x is seven less than 160. Find the number x you are looking for. - Consecutive 31611
The sum of two consecutive natural numbers, of which the greater is 4x, equals the number 55. Determine the number x.
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