Nina has $40 in the bank. She writes a check for $63, deposits
$80 and writes another check for
$140. What is her balance
HELP

Y=4x^2+x-1 solve using quadratic formula

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?