Susan's cell phone plan includes unlimited texting. The amount she pays for texting each month can be described by the function y=20, where y is the number of dollars spent on texting as a function of x, the number of texts.

they used 313 gallons of paint

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation:

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x