GENERAL MATHEMATICS 1ST

Which of the following relation is function?

• f = {(3, -2), (-2, 2), (1, 5), (3, 5)}

• g = {(1, -1), (0, 0), (2, 1), (3, 2)}

• h = {(1, 4), (2, 8), (2, 9),(4,12}

• f = {( 5,5), (3, 2), (3, 6), ( 5,7)}

In a relation, what do you call the y values or the output?

• Domain

• Piecewise

• Independent

• Range

Given: f ( x) = 2x^2+ x – 3, g (x) = 8x -1

​​and h(x) = 3x + 4. Find ( f + g) (x).

• 2x^2+ 4x + 4

• 2x^2+ 8x + 2

• 2x^2+ 9x – 4

• 2x^2+ 4x – 2

Given: f ( x) = 2x^2+ x – 3, g (x) = 8x -1

​​and h(x) = 3x + 4. What is g(x) + h(x)?

• 10x + 5

• 11x – 5

• 11x – 3

• 11x + 3

Given: f ( x) = x^2 - 4x + 3,

​g (x) = x -1, n ( x) = x – 3 and m(x) = 2x^ - x – 15. What is m(-1) ● f(2)?

• -12

• 11

• 12

• 15

m(x) = 3x + 4 and n (x) = x -5. Find ( n ₒm) (x).

• 3x - 1

• 3x + 1

• 3x - 11

• 2x - 12

If the temperature in degrees Celsius inside the Earth is represented by ​T(d) = 10d + 20 where (d) is the  depth in kilometers, what is the temperature inside the Earth in 10 kilometers?

• 90 degrees

• 40 degrees

• 120 degrees

• 180 degrees

Under a certain Law, the first ₱30,000.00 of earnings are subjected to 12% tax, earning greater than    

    ₱30,000.00 and up to ₱50,000.00 are subjected to 15% tax, and earnings greater than ₱50,000.00 are taxed at 20%. Which function represents the earnings of ₱35,000.00?

• 𝑡(𝑥) = 0.15𝑥 𝑖𝑓 30,000<x≤50,000

• 𝑡(𝑥) = 0.2𝑥 𝑖𝑓 𝑥 > 50,000

f ( x) = 5x – 3. Find f (1).

• 2

• 3

• 5

• 8

Find r (2).

• 5

• 4

• 3

• 1