A question on a math test asked students to "Simplify the expression 7 - 3k + 9k -23". Kate answered "2(3k - 8)". Is she correct or incorrect? Explain. If incorrect, give the correct answer.

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

On a cm grid, point p has coordinates (3,-1) and point q has coordinates (-5,6) calculate the shortest distance between p and q give your answer to 1 decimal place

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?