Ratio - 9th grade (14y) - math problemsOn solving problems and tasks with proportionally, we recommend hint rule of three. Rule of three (proportionality) help solve examples of direct and inverse proportionality. Three members make possible to calculate the fourth - unknown member.
Number of examples found: 235
- Percentage 10
52 shorts and missed 13. Calculate percentage
What is the slope of the line defined by the equation -2x +3y = -1 ?
Calculate the slope of a line that intersects points (-84,41) and (-76,-32).
- The angles
The angles in the triangle are in the ratio 12: 15: 9. Find the angles.
School attend 792 children, boys and girls ratio is 4:5. How many more girls go to school (than boys)?
- Cube, cuboid, and sphere
Volumes of a cube and a cuboid are in ratio 3: 2. Volumes of sphere and cuboid are in ratio 1: 3. In what ratio are the volumes of cube, cuboid, and sphere?
- Three numbers
The sum of the three numbers is 287. These numbers are in a ratio of 3: 7: 1/4 Define these numbers
- V - slope
The slope of the line whose equation is -3x -9 = 0 is
- Dividing money
Jane and Silvia are to divide 1200 euros in a ratio of 19:11. How many euros does the Jane have?
- Inscribed sphere
How many % of the volume of the cube whose edge is 6 meters long is a volume of a sphere inscribed in that cube?
- Slope RR
A line has a rise of 2 and a run of 11. What is the slope?
The speedometer of a car reads 66 km/h. It's accurate to within 4.1% What is the maximum possible error?
- Triangle angles
The angles α, β, γ in triangle ABC are in the ratio 6:2:6. Calculate size of angles.
- angles in quadrilateral
What size have angles in quadrilateral (4-gon) if they are in a ratio of 8: 9: 10: 13?
Cylinder was drawn in scale 2:1. How many times is the volume of the cylinder smaller in reality?
- Rectangle - sides ratio
Calculate area of rectangle whose sides are in ratio 3:13 and perimeter is 673.
- Rectangle area
The length of a rectangle of x units is increased by 10% and its width of y units is increased by 15%. What is the ratio of the area of the old rectangle to the area if the new rectangle?
- Book read
If Petra read 10 pages per day, she would read the book two days earlier than she read 6 pages a day. How many pages does a book have?
- Smallest internal angle
Calculate what size has the smallest internal angle of the triangle if values of angles α:β:γ = 3:4:8
- Line segment
For the line segment whose endpoints are L[-1, 13] and M[18, 2], find the x and y value for the point located 4 over 7 the distance from L to M.
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