Solving Real-life Problems Involving Functions

Given ℎ(𝑥) = (5𝑥−6)/3, determine ℎ(3).

• -3

• -1

• 1

• 3

Let 𝑓(𝑥) = 𝑥²− 𝑥 + 2, find 𝑓(𝑥 + 1)

• 2x² + x +2

• 2x² + 2x + 3

• x² + x + 1

• x² - x + 3

Which of the following expresses the total earnings (E) as a

function of the number (n) of days if a laborer works and

earning ₱350 per day?

• E(n)=350 + n

• E(n) = 350n

• E(n) = 350/n

• E(n) = 350 - n

If the temperature in degrees Celsius inside the Earth is represented by T(d) = 12d + 22 where (d) is the depth in kilometers, what

is the temperature inside the Earth in 10 kilometers?

• 144

• 142

• 140

• 138

Cotta National High School has 1,200 students enrolled in 2016

and 1,500 students in 2019. The student population P grows as a

linear function of time (t), where t is the number of years after

2016.

A. Which of the following functions represents the student

population that relates to time t?

• P(t)= 100t + 1,200

• P(t)= 1000 + 200t

• P(t)= 100t + 2200

• P(t)= 100t + 1,500

Cotta National High School has 1,200 students enrolled in 2016

and 1,500 students in 2019. The student population P grows as a

linear function of time (t), where t is the number of years after 2016.

B. How many students will be enrolled in Cotta National High School by 2020?

• 1900

• 1800

• 1700

• 1600

Mark charges ₱100.00 for an encoding work. In addition, he charges ₱5.00 per page of printed output.

A. Find a function f(x) where x represents the number of pages of printed out.

• f(x) = 100 + 5x

• f(x) = 100 - 5x

• f(x) = 100 + 2x

• f(x) = 100 - 2x

Mark charges ₱100.00 for an encoding work. In addition, he charges ₱5.00 per page of printed output.

How much will Mark charge for 55-page encoding and printing work?

• ₱275.00

• ₱350.00

• ₱375.00

• ₱400.00

Mark charges ₱100.00 for an encoding work. In addition, he charges ₱5.00 per page of printed output.

How many pages were printed if Mark received a payment of ₱600.00?

• 100 pages

• 80 pages

• 60 pages

• 50 pages

Mark charges ₱100.00 for an encoding work. In addition, he charges ₱5.00 per page of printed output.

If Mark offers a promo to loyal costumer that the first 20 pages of the printed output will be free of charge, how much will he charge to a loyal customer who printed 70 pages of output?

• 250

• 350

• 400

• 455