50.C; The contrapositive of a statement always hasthe same truth value as the statement.51.B; let xbe the number of girls in class. Then thereare 322xboys in class.}32x2x} 5¬}53}3x5¬5(322x)3x5¬16025x8x5¬160x5¬2032 2x5¬12Thus, there are 20 girls and 12 boys in class, sothere are 20 212 or 8 more girls than boys.Page 80Maintain Your Skills52.George Washington was the first president of theUnited States and a hexagon has 5 sides.p `q is false because pis true and qis false.53.A hexagon has five sides or 60 33518.q ~ris false because qis false and ris false.54.George Washington was the first president of theUnited States or a hexagon has five sides.p ~qis true because pis true.55.A hexagon doesn’t have five sides or 6033518.,q ~ ris true because ,qis true.56.George Washington was the first president of theUnited States and a hexagon doesn’t have fivesides.p `,qis true because pis true and ,qis true.57.George Washington was not the first president ofthe United States and 6033 Þ18.,p ris false because ,pis false and ,ristrue.58.AB5CD;AD5BC59.The sum of the measures of the angles in atriangle is 180.60.n
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This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.