The speed of a certain chemical reaction is expressed by the equation
Y= 120 - 4x + x², where y is the number
of seconds needed to complete the
reaction and x is the temperature, in
degrees Celsius, at which the reaction
occurs. The reaction is complete in 141
seconds. At what negative temperature,
in degrees Celsius, could the reaction
have occurred?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Even if a person is in very good shape, applying to be a police officer requires commitment to fitness. applicants must pass a physical fitness test. in order to prepare for the test, janet purchases an activity tracker to court her steps. her goal is to walk 10,000 steps each day. she measures heard average step length to be 30 inches. play janet runs, her average steps length increases to 36 in. how many steps would she have to take to run 1 mile 50280 round to the nearest step

What is the value of x? enter your answer in the box.