The grades on a math midterm at Springer are roughly symmetric with μ=68 and σ=4.5. Brandon scored 71 on the exam. Find the z-score for Brandon's exam grade. Round to two decimal places.

Write a corresponding real world problem to represent 2x - 125=400

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form