Math practice for 13 year olds - page 387 of 413
Number of problems found: 8253
- 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? - Chord - TS v2
The radius of circle k measures 72 cm. Chord GH = 11 cm. What is TS? - Rhombus diagonal
The area of a rhombus is 790. One diagonal measures 45. Find the length of the second diagonal. - Dog
The man went with a dog on a long walk 15 km from the house. The man is walking at a speed of 4 km/h. A dog constantly runs between the house and the man at 15.2 km/h. How many kilometers will the dog run when they reach its destination? - Division
Three siblings, Helena, Oliver, and George, split the bag with candies on merit in the ratio 1:10:2. How many candies should each get if in the bag were 169? - EQL triangle
Calculate the inradius and circumradius of an equilateral triangle with side a=67 cm. - Gasholder
The gasholder has a spherical shape with a diameter of 26 m. How many cubic meters (m³) can hold in? - Flowerbed 2
Around the square flower bed in a park is a sidewalk about 1.3 m wide. The area of this sidewalk is 246 m². What is the area of the flowerbed?
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