An Internet site sells 120 types of cell phones. The ratio of the number of smartphones to the number of feature phones is 3:5. How many of the 120 types of cell phones are smartphones? Use the on-screen keyboard to type your answer in the box below.

Number of smartphones = 45

Step-by-step explanation:

Given:

Total number of phones = 120

Ratio [Smartphones to feature phones] = 3:5

Find:

Number of smartphones

Computation:

Number of smartphones = 120[3/(3+5)]

Number of smartphones = 120[3/(8)]

Number of smartphones = 360 / 8

Number of smartphones = 45

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.