the sum of a number plus its double is equal to 42
x + 2x = 42
convert into a fraction: 0, 125
125/1000 = 1/8
Find the area of a hexagonal prism with length 7 m and height 4 m.
422,6m²
A 4-meter-high pole casts a 3-meter shadow. At a certain distance, a person is 1.8 meters tall and casts a 1.35-meter shadow. Using Thales' Theorem, how far away is the person from the pole?
The person is 4.35 meters from the post.
solve with sustituation: y= 2x + 1/ x + y = 7
x=2, y=5
calculate: 18: (-3) + (-4)
-10
What does Thales` Theorem say?
you have a triangle and you draw a line inside that is If parallel to one of its sides, that line divides the other two sides into proportional parts.
calculate: 2x+4=16
x= 6
calculate: 50% of x = 12
24
CALCULATE: 3x = 15
x=5
say the formula of the pithagorean theorem
h² = a² + b²
if 3 kilos of apples cost 9$, how much cost 5 kilos?
15
Calculate the volume of a cube with an edge length of 8cm
A= 384m²
1 + 2a - 4b + 3a²b + ab. Say the degree
3
if you know the hypotenuse and one leg of a right triangle, can you find the lenght of the other leg?
yessss
Is the result of multiplying a positive numbur with a negative one is always negative?
Yessss
A train travels at 80km/h. How long does it take to travel 240 km?
3 hours
In the graphic method: what does it mean if the two lines you draw don´t intersect at any point?
It doesn`t have solution
Order these integers from least to greatest: -3, 7, 0, -1, 5.
-3, -1, 0, 5, 7
Say the 4 methods of equations
substituation, equalization, elimination and graphical method
calculate: 2x-9 = 3x-17
x=8
calculate: -8+4-7+10
-1
A right triangle has hypotenuse of 15 cm and one leg measures 9 cm. calculate the lenght of the other leg
other leg = 12cm
solve with elimination method: 3x + 2y= 12/ 5x - 2y = 8
x= 2,5, y=2,25
calculate: 65% of 80
52
volume of a cylinder with a radius of 4 dm and a height of 9 dm
459,39dm³
Take common factor: 5XY - 10X
5X(Y-2)
identify the coefficients of this equation: 6x² + 6x + 1 = 0
a=6, b=6, c=1
A right triangle has a leg of 6 cm and another leg of 8 cm, what measures the hypotenuse?
hypotenuse = 10cm
calculate: 5/6 + 7/12 - 1/4
7/6
In a triangle, a line parallel to a side divides two segments in proportions 2 and 4. If one segment measures 6 cm, how long is the other?
The other segment measures 12 cm.
which is greater 11/20 or 0,52?
11/20
Calculate the volume of a sphere with a radius of 6 cm
volume = 904,78cm²
find two fractions equivalent to: 9/12 (with differents denominators)
18/24 and 27/36