A1AM

Which is the formula to calculate the volume of the cone, given the radius r and the height h?. (1/3)πr²h. (1/3)π*r³h. (1/3)πrh².

Which is the cube root of 64?. 4. 5. 3.

Which is the area of a ring with an outer diameter of 90 cm and an inner diameter of 80 cm?. 1334,5 cm2. 31,4 cm2. 5338 cm2.

Which one is the correct formula to evaluate the area of a trapezium with greater base "B", smaller base "b" and height "h"?. A=[(B+b)·h]. A=2[(B+b)·h]. A=[(B+b)·h]/2.

5. Which is the formule for calculating the area of a right angled triangle?. 1/2 (base x height). 1/2 base / height. 1/2 height + base.

Which geometrical shape has no parallel sides?. o Kite. o Rhombus. o Trapezoid.

7. Which is the result of the expression 4(4 (4 – 1) –1) –1 ?. 31. 43. 61.

Which are the first operations that must be done?. Additions and subtractions. Multiplications and divisions. Operations indicated inside the brackets.

Which is the value of the expression ((a-1)/(a²+1))-((a³-1)/(a⁴-16))-2 if a=-2?. impossible. -2. -1.

To what is equal logz(a^(-k)) ?. a+logzk. k·log2a. (-k·logza).

Which is the decimal number 738 in binary coded?. 111100010. 1011100010. 101111001.

Which is the result of the simplification of this expression [(w + z)(x – y)(y – w)]/[(y – x)(w – y)(w + z)]?. -1. 1. 0.

Which is the value of the expression ((a-1)/(a²+1))-((a³-1)/(a⁴-1))-2 if a=-1?. -3. indefinite. -2.

Which is the supplementary angle of a 3 degrees angle?. 77°. 177°. 347.

If "a" is the slope of a straight line, which of these is the slope of the parallel line?. a. -a. 1/a.

When two lines are perpendicular?. If m1=-1/m2. If m1=-m2. If m1=m2.

When two lines are parallel?. If m1=-1/m2. If m1=m2. If m1=-1/m2.

Which is the result of the expression 2x²z²(3x – z)?. 6x²z² – 2x²z². 6x³z² – 2x²z³. 6x²z² + 3x – z².

Which is 'c' expression, given: y = mx + c?. y - mx. mx - y. y + mx.

What is the mathematical meaning of y= logz(x)?. x=zy. x=yz. z=xy.

Which is 'x' expression, given: y = mx + c?. (y - m)/c. (y - c)/m. (y/m) - c.

Considering the two equations 3x+2y-5=0 and x+y=7, what is the value of x and y?. x=-16 ; y=-9. x=9 ; y=-16. x=-9 ; y=16.

Which is the value of the x in the following equation? -x+2x-4+(3-3x-4x-2)=3-x-2. -5/3. 4/3. -4/5.

Which is the y-intercept in the equation 4y = 2x + 8?. 4. 2. 8.

When is possible to define an equation "impossible"?. When the set of solutions is empty. When the set of solutions contains a finite number of elements. When the set of solutions contains an infinite number of elements.

Which is the value of the x in the following equation? x=1+(1/2)x. -1/2. 2. 1.

Which is the solution of the equation x2+3x-4=0 ?. x1=-4 ; x2=-1. x1=1 ; x2=-4. x1=-3 ; x2=1.

Which kind of equation is represented by ax² + bx + c = 0?. Quadratic equation. Gradient of the line. Polynomic equation.

How can also be written the expression y = mx + c ?. x = (y - c)/m. x = y/m - c. x = y/(m + c).

Which is the solution of the equation -2x2+8=0 ?. x1=x1=2. x1=x2=-2. x1=x2=±2.

Which is the value of the x in the following equation? (1/2)(x-1)+3x=2(x+2). 3. -1. 1/3.

Which is 'm' expression given: y = mx + c?. (y - c)/x. (y/x) - c. (y - x)/c.