Equation + functions - practice problems - last page
Number of problems found: 1699
- Father and son
Father and son are 74 years old together. Son is 30 years younger than father. How old is the son? - Quiz
The tested student answered correctly on a 4/ 8 question. The wrong answer was 16. How many questions were answered? - Sumo competition
In the competition for the heaviest man was 5 competitors. The first three together weighed 369 kg. What is the minimal weight of the winner if a contestant weighed with an accuracy of one kilogram? - Radioactivity
After 548 hours decreases, the activity of a radioactive substance to 1/9 of the initial value. What is the half-life of the substance?
- Exponential equation
Solve exponential equation (in real numbers): 23x-6=9 - Computer revolution
When we started playing with computers, the first processor, which I remember was the Intel 8080 from 1974, with the performance of 0.5 MIPS. Calculate how much percent of a year rose CPU performance when Intel 486DX from 1992 has 54 MIPS. What would - Logarithmic equation
Solve equation: log13(7x + 12) = 0 - Ladislav in Amsterdam
Laco went (was sent) to a conference in Amsterdam for a reward. The conference fee was € 1304. Calculate how many books Ladislav could buy at the price of 32 and 22 euros if he doesn't want to fill the whole home library, and he can buy only 52 books - Number ratio
Calculate two positive numbers. Its ratio is 6:6, and difference was 0.
- Chickens and rabbits
In the yard were chickens and rabbits. Together they had 23 heads and 76 legs. How many chickens and how many rabbits were in the yard? - Acid
The barrel is 199 liters of 38% acid. How many percent of acids occur when 61 liters revoke and replaced with the same amount of water? - Ships
At 8:40, the ship set sail at 12 km/h. At 19:10 followed by 29 km/h sailboat. When does the sailboat catch up with the ship? How many minutes will catch uptake? - Salary raise
The monthly salary was 620 Eur. During the year, it was raised to 727 Eur. Calculate the month from salary was increased that employee earned 7547 Eur during the whole year. - Reconstruction of the corridor
Calculate how many minutes will be reduced to travel a 167 km long railway corridor, where the maximum speed increases from 120 km/h to 160 km/h. Calculate how many minutes will shorten travel time if we consider that the train must stop at 6 stations. Ea
- Party
At the party, everyone clinked with everyone. Together, they clink $strng times. How many people were at the party? - Trolleybus
Trolleybus line No. 206 measured 24 km. If the trolley bus goes faster by 5 km/h, the way there and back would be shorter by 33 minutes. Calculate the trolley bus speed and the time it takes for a return trip. - When will I be a millionaire?
Barry monthly send 280 euros to the bank, which he deposits bear interest of 2.1% p. A. Calculate how many months must Barry save to save 1000000 euros? Inflation, interest rate changes, or bank failures are ignored. - Volatile percents
Kent is working as a forex trader. He suffered a loss of 65.8 percent. Calculate what percentage must now earn to lift from loss. - Greek railwayman
Lewis works for the Slovak railways since 2000. His salary is 950 €. His colleague, Evgenias works in the Greek State Railways from 1984. Evgenias earns 5700 € per month. Calculate: a) how many times does Evgenias earn more than Lewis? b) how many times d
Do you have homework that you need help solving? Ask a question, and we will try to solve it.