Expression of a variable from the formula + rational numbers - math problems

Number of problems found: 7

• Insert 3
Insert five arithmetic progression members between -7 and 3/2.
• Positive number z
Positive number z is 10% greater than the number y. How many % is y smaller than z? Report the result rounded to one decimal place.
• Average price
Sixth grade went on a trip to Moravia. Each of the 26 pupils paid CZK 320 and the school paid a total of CZK 3,510. What was the average price of a trip per student?
• Sea water
Mixing 62 kg of sea water with 84 kg rainwater is created water containing 3.1% salt. How many percent sea water contains salt?
• Rectangular cuboid
The rectangular cuboid has a surface area 5334 cm2, and its dimensions are in the ratio 2:4:5. Find the volume of this rectangular cuboid.
• Two cars
Two cars started against each other at the same time to journey long 346 km. The first car went 53 km/h and the second 53 km/h. What distance will be between these cars 20 minutes before meet?
• Boats
Three-quarters of boats are white, 1/7 are blue and 9 are red. How many boats do we have?

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Expression of a variable from the formula - math word problems. Rational numbers - math word problems.