2025 Algebra 3.4 Lesson

Multiple Choice

If f(x) = 3x - 9, find f(5).

• f(5) = 6
• f(5) = 16
• f(5) = -4
• f(5) = 24

Multiple Choice

Given h(x) = 5 - 9x, find h(8). 

• h(8) = -360
• h(8) = -67
• h(8) = 31

• h(8) = 77

Multiple Choice

A gym charges a $15 registration fee and $5 per session. If 𝑥 represents the number of sessions, the total cost for going to the gym is represented by 𝑓(𝑥) = 5𝑥 + 15. Mario will be going to the gym no more than 4 times this week.

What is a possible domain for this situation?

• {1,2,3,4}

• {20,25,30,35}

• {𝑥 | 0 ≤ 𝑥 ≤4}

• {𝑦 | 15 ≤ 𝑦 ≤ 35}

Multiple Choice

Joe had a summer job that pays $7.00 an hour and he worked  between 15 and 25 hours every week. His weekly salary can be  modeled by the equation:   y = 7x, where y is his weekly salary and  x is the number of hours he worked in a week. What is a reasonable domain for this function?

• {15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25}

• {105, 112, 119, 126, 133, 140, 147, 154, 161, 168}

• {x | 15 ≤ x ≤ 25}

• {x | 105 ≤ x ≤ 168}

Multiple Choice

A hot air balloon starts at an altitude of 80 meters and rises at a steady rate. The total altitude, B(t), in meters, is a linear function of the number of minutes, tt, the balloon has been ascending. The function is:

B(t)=80+10t

If the balloon has been ascending for 5 minutes, what is its altitude?

• 130 meters
• 120 meters
• 140 meters
• 100 meters

R96, U98,

IXL PRACTICE (SCORE 50)