Do you use data on a cellphone? You may have a maximum amount of data you can use without having to pay more. Suppose a family data plan includes 10 gigabytes of shared data and costs $80 per month. Any additional data usage is billed at $15 per gigabyte. A certain family wants to spend at most $125 on their bill each month. You could use an inequality to find that the family can use at most 3 additional gigabytes of data. When else could you use an inequality to find a range of values?

Speed limits on the highway, minimum payments on credit card bills, the number of text messages you can send each month from your cell phone, and the amount of time it will take to get from home to school. All of these can be represented as mathematical inequalities.

Step-by-step explanation:

A speed limit of 55 mph means you must drive less than or equal to 55 mph.

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

answer: it's d

step-by-step explanation: