In 3/4 identify the role of 3. then explain how to read tbis number

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Recall that two angles are complementary if the sum of their measures is? 90°. find the measures of two complementary angles if one angle is twenty dash nine times the other angle.