Title: Por defecto en MATH I, EXTRA DEC 2020
Course: 2025 Probabilidad y Estadística

Categoría por defecto para preguntas compartidas en el contexto MATH I, EXTRA DEC 2020.

Feedback shared by this category's questions, if right: Su respuesta es correcta.
Feedback shared by this category's questions, if partly right: Su respuesta es parcialmente correcta.
Feedback shared by this category's questions, if wrong: Su respuesta es incorrecta.

Q: Simplify the following expression:

[(4^2 (5)(2) + 8) + 18] ¸ [(4 + 2^4) - 4^2]=
- -4
- 7.5
- 8
A: 8

Q: Simplify the following expression:

- (x + y) + [3x - 2y + {-8x - 5y - (6x - 8y - 7y)}] =
- -12x +7y
- -12x -7y
- -10x-19y
A: -12x +7y

Q: Solve for x:

x(x-15) + 3 = (6 + x)(6 + x) -18 =
- x = -5/9
- x = 5/9
- x = 7/9
- x = -7/9
A: x = -5/9

Q: If 36 boxes of cereal cost $162.00, how much do you have to pay for 50 boxes?
- $11.10
- $225
- $360.00
A: $225

Q: In a gym only the 35% of the capacity is allowed, if only 28 people are in there, how much is the total allowed?
- 10 people
- 45 people
- 80 people
A: 80 people

Q: Solve the following equations by Elimination method:

2x - 3y = 9;            5x + 6y = -45
- (-3, -5)
- (3, -5)
- (-3, 5)
A: (-3, -5)

Q: Find the number or sides of a regular polygon if its interior angle is 165°
- 18
- 20
- 24
- 27
A: 24

Q: The interior angles in a quadrilateral are represented by A=(1.4x) °, B=(2.6x)°, C=(3.5x) ° and D=(4.5x)°. Find the measurement of angle B.
- 42°
- 78°
- 105°
- 135°
A: 78°

Q: In the center of a square yard with 125m by side, is a square pool, with measure of 50m by side. Find the area of the yard.
- 150 m^2
- 2,500 m^2
- 13,125 m^2
- 15,625 m^2
A: 13,125 m^2

Q: The perimeter of a rectangular playground is 540ft. If the width is 110ft, what is the length of the playground?
A: 160
Feedback ("160"): Write only numbers

Q: Solve by substitution

4x - y = -3; 2x + 5y = 13
- \( ( \frac{-1}{11} , \frac{29}{11}) \)
- \( ( \frac{1}{11} , \frac{-29}{11}) \)
- \( ( \frac{26}{11} , \frac{23}{11}) \)
- \( ( \frac{-26}{11} , \frac{-23}{11}) \)
A: \( ( \frac{-1}{11} , \frac{29}{11}) \)

Q: Factor out the following expression

y^2-y-56
- (y-8)(y+7)
- (y-8)(y-7)
- (y+8)(y+7)
A: (y-8)(y+7)