Expression of a variable from the formula - 7th grade (12y) - math problems
Number of examples found: 209
- Simple equations
Solve system of equations: 5x+3y=5 5x+7y=25
- Unknown number 24
f we add 20, we get 50% of its triple. What is this unknown number?
- Two thirds
Find two-thirds of the number equal to two-thirds of 99
- Simple equation 3
24 = n • 27, solve for n
- Perimeter to area
Calculate the area of a circle with the perimeter 15 meters.
Given 2x =0.125 find the value of x
Car with cargo weight 7610 kg. Weight of car is 23% of the total weight of car and cargo. How heavy is cargo?
The sum of all cube edges is 30cm. Find the surface area of the cube.
Which decimals when subtracted equal 3.89: a - b = 3.89
- Diagonal of square
Calculate the side of a square when its diagonal is 10 cm.
- Area to volume
If the surface area of a cube is 486, find its volume.
- Third dimension
Calculate the third dimension of the cuboid: a) V = 224 m3, a = 7 m, b = 4 m b) V = 216 dm3, a = 9 dm, c = 4 dm
- Simplify 2
Simplify expression: 5ab-7+3ba-9
- Interior angles
Calculate the interior angles of a triangle that are in the ratio 2: 3: 4.
- The perimeter 3
The perimeter of a rectangle is 35 cm. The ratio of the length to its width is 3:2. Calculate the dimensions of the rectangle
- One and a half chicken
One and a half chicken bears one and a half egg in one and a half day. How many eggs can withstand from 6 chicken in 6 days?
The hotel has a p floors each floor has i rooms from which the third are single and the others are double. Represents the number of beds in hotel.
- Rhombus A2p
Rhombus area is 13 cm2 and its height is 5cm long . Determine a perimeter of this rhombus.
- Cube surface and volume
Find the surface of the cube with a volume of 27 dm3.
- Cube edges
The sum of the lengths of the cube edges is 42 cm. Calculate the surface of the cube.