Electricity
What are the three electric magnitudes?
Voltage, intensity and resistance.
What do you call a four-sided polygon?
Square
What is the common difference in arithmetic progression: 3, 6, 9, 12...?
3
Resolve: x^2 - x -6
x1=-2 x2=6
¿Qué quiere decir P(Ā)?
La probabilidad de que no ocurra ese suceso.
What is the Ohm’s law?
I=V/R
If a square has a side of 10 cm, what is its area?
100cm^2
What is the fourth term of the arithmetic progression: 5, 8, 11, ...? 14
What is the fourth term of the arithmetic progression: 5, 8, 11, ...? 14
Resolve the system: x/3 + y/5 = 7 and x/3 - y/4 = -1
x=31/3 y=160/9
What is the difference between AUB and A^B?
AUB es la probabilidad de que ocurra un suceso u otro. A^ B es la interacción, es decir, la probabilidad de que ocurran los dos sucesos a la vez.
What is the unit to measure the electric resistance?
Ohms
What is the formula for the volume of a right prism?
V= A base x h
What is the fifth term of the geometric progression: 2, 4, 8, 16, ...?
32
A mother's age is three times her daughter's age plus 2 years, and 5 years ago she was four times her daughter's age. What are the ages of mother and daughter?
Mother: 53 years old
Daughter: 17 years old
What is the probability that in a group of five people at least two of them were born in the same month?
61.8% chance
How do we call the amount of charges that goes through a conductor per time unit?
Intensity.
A circle has a radius of 5 cm. What is its area?
78.5cm^2
In an arithmetic progression, the first term is 7 and the common difference is 4. What is the term number 10?
43
A rectangle has a perimeter of 50 meters. The length is 3 meters more than twice the width. What are the dimensions of the rectangle?
Width: 7.33m, Length: 17.67m
In a box there is are some papers. There is a red, a white, a green and a blue. We take out two of them with replacements. Calculate the probability of getting two blue papers.
1/16
True or false? Intensity is directly proportional to voltage.
True
A trapezoid has bases of 10 cm and 6 cm, and a height of 4 cm. What is its area?
32cm2
In a geometric progression, the second term is 6 and the fourth term is 24. What is the “razón” r and the first term a1?
r=2, a1=3
The sum of two numbers is 24. If one of them is subtracted by 3 and the other is multiplied by 2, the result of adding both is 36. What are the two numbers?
9 and 15
Two incompatible events A and B are considered such that P(A) = 0.35 and P(B) = 0.15. Calculate P(AuB).
50%