Idiot\'s Guides Basic Math and Pre-Algebra

Extra Practice Answers 329 55. y = 6 –^35 x x + y = 8 1123 x 2 x 11 x 2 1125 x 1 -5x -10 -2 062 -2 2 4 6 -4 -6 -5-6-7-8 -4 -1- ...

330 Appendix B 3x – y = 7 y = 5 -2 062 -2 2 4 6 -4 -6 -5-6-7-8 -4 -1-3 1345 789 -8 -9 -1 -3 -5 -7 8 9 1 3 5 7 10 11 12 -10 10 ...

Extra Practice Answers 331 If m’J = 80r, m’M 80 r, then m’A = 180 – (80r + 80r) = 20r. If AR = 7 cm, RM = 13 cm, and 'ARM is is ...

332 Appendix B 106. 100 72 tan72 100 x x100tan72 307.8 feet 96. SA 582141 2 ? 8? 55641 4 ?5 20 641805144 cm^2 SA 52 1 2?^18 ...

Extra Practice Answers 333 110. 111. 112. 113. 114. 115. 25 75 sin75  25 24.1 feet x x  25sin75 3 blue 10 marbles 3 10  5 r ...

334 Appendix B Range = 30 – 6 = 24. Median = 18. First quartile = 14. Third quartile = 26. Mean = 6112114116116118120122 ...

APPENDIX C Glossary absolute value The distance of a number from zero, without regard to direction. acute angle An angle that me ...

336 Appendix C associative property A property of addition or multiplication that says that when adding or multiplying more than ...

Glossary 337 congruent triangles Two triangles are congruent if corresponding sides are congruent and corresponding angles are c ...

338 Appendix C exponent A small number written to the upper right of another number that tells how many of that number should be ...

Glossary 339 least common denominator The least common multiple of two or more denominators. least common multiple The smallest ...

340 Appendix C ordered pair Two numbers, usually designated as x and y, that locate a point in a coordinate system. order of ope ...

Glossary 341 principal The principal is the amount of money borrowed or invested. The rate is the percent of the principal that ...

342 Appendix C regular polygon A polygon is regular if all sides are the same length and all angles are congruent. relatively pr ...

Glossary 343 square A parallelogram in which all sides are congruent. A square is a parallelogram with four congruent sides and ...

APPENDIX D Resources One of the first things you learn as a teacher is that sometimes the best way to help a student understand ...

APPENDIX E Measurement ............................................................................ Throughout this book, you’ve ...

346 Appendix E Notice that the units of length, mass, and capacity are linked. The liter is the capacity of a cube 10 centimeter ...

Measurement 347 When you’re changing units within a system, the thing to remember is balance. If you’re chang- ing to a unit of ...

348 Appendix E Capacity The customary system uses ounce to measure capacity, but an ounce measured by capacity is not necessaril ...