Eduardo solved the following inequality, and his work is shown below: −5(x + 4) ≥ 4x − 38
−5x − 20 ≥ 4x − 38
−9x − 20 ≥ −38
−9x ≥ −18
x ≥ 2

What mistake did Eduardo make in solving the inequality?

a. When dividing by −9, he did not change the direction of the sign.
b. He subtracted 4x from both sides when he should have added.
c. He added 20 to both sides when he should have subtracted.
d. He did not make a mistake.

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.