Can i get some help with this question please

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What signals you that factoring by grouping is the best method to use when factoring a problem?

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

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?