Math practice for 13 year olds - page 387 of 413
Number of problems found: 8260
- Comparing powers
How many times is number 66 larger than number 46? - 6-gon
The perimeter of a regular hexagon is 154. Calculate its circumradius (radius of a circumscribed circle). - Well
A rope with a bucket is fixed on the shaft with the wheel. The shaft has a diameter of 45 cm. How many meters will drop bucket when the wheels turn 7 times? - Two cars
Car A1 goes at an average speed of 127 km/h, and the second car, A2, goes at 122 km/h. How many seconds will it take car A1 to circulate car A2? Assume that both cars are 4.7 meters long and the safety gap between cars is 2.6 meters. - Inscribed rectangle
The circle area is 231. Determine the area of the inscribed rectangle with one side 13 long. - Tachometer
Tatra's tachometer shows the initial state 275639 km this morning. Today, Tatra travels at an average speed of 28 km/h. Determine the function that describes the Tatra's tachometer depending on the time. What is the state of the tachometer after 7.1 hours - ISO trapezium
Calculate the area of an isosceles trapezoid with base 50 long, leg 12 long, and with the angle between the base and leg 70 degrees. - Alcohol 2
Two types of alcohol, one 46% and second 64%, give 16 liters of 54% alcohol. How many liters of each type are in the mixture? - V - slope
The slope of the line whose equation is -6x +7 = 0 is - Price reduction
The price of the camera is 360 Euro on sale. They reduced its price to 198 Euro. Calculate the percentage reduction in the price of the camera. - New refrigerator
The new refrigerator sells for 836 Euro. Monday will be 25% discount. How much will Euro save, and what will be the price? - Slope form
Find the equation of a line given the point A(7, 2) and slope -1.9. Arrange your answer in the form y = ax + b, where a and b are the constants. - Double percent
What is 60% of 30% of 8300? - Complementary angles
Two angles are complementary. If one angle measures 39°, what is the measure of the second angle? - Slope
Calculate the slope of a line that intersects points (77,-35) and (11,44). - CD disc
A compact disc has a diameter of 11.8 cm. What is its surface area in square centimeters? - 30-60-90
The longer leg of a 30°-60°-90° triangle measures 14. What is the length of the shorter leg? - Sales off
What was its original price if a sweater sells for $ 10 after a 25% markdown? - Diameter
If the endpoints of the diameter of a circle are A(10, -10) and B (9, -2), what is the circle's radius? - Scouts
The boys from the scout group traveled a distance of 140 km over d days. Every day, they walked less than the previous day. How many kilometers did the scouts walk on the first day?
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