Concept explainers
For Exercises 65–70, multiply or divide as indicated. (See Example 7.)
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- In Exercises 15–20, simplify each expression. 15. 24 - 36 ÷ 4.3 16. (52 – 24) + [9 ÷ (-3)] (8 – 10) - (-4)² 17. - (-4) 2 + 8(2) ÷ 4 18. 7x – 4(3x + 2) – 10 19. 5(2у — 6) - (4у — 3) 20. 9х — [10 — 4(2х — 3)1arrow_forwardIn Exercises 33–37, simplify each exponential expression. 33. (-2r)(7x-10) 34. (-&rSy)(-5x?y*) -10xty 35. -40x-2y6 36. (4x-Sy?)-3 -6xy 37. -2 2x*y 3,,-4arrow_forwardExercises 81–84 involve the perimeter and area of various geometric figures. Refer to Table 1.6 on page 60 if you've forgotten any of the formulas. In Exercises 81-82, find the perimeter and area of each rectangle. Express answers in simplified radical form. 81. V125 feet 2V20 feet 82. 4V20 feet V80 feet 83. Find the perimeter of the triangle in simplified radical form. V80 m V45 m V125 m 84. Find the area of the trapezoid in simplified radical form. V2 feet Võ feet Vỹ feetarrow_forward
- In Exercises 65–74, factor by grouping to obtain the difference of two squares. 6x + 9 – y? 12x + 36 – y? 65. x? 66. x2 67. x + 20xr + 100 68. x? + 16x + 64 – x4 69. 9x2 70. 25x? – 20x + 4 – 81y? 30x + 25 – 36y? 71. x* - x? – 2x – 1 72. x4 -х2 — бх — 9 x? + 4xy – 4y2 x²+ 10xy - 25y2 73. z? 74. z? - rarrow_forwardMultiply - 5 -5 8 7 8 8 -4 -1. Preview 2.arrow_forwardim 2. 2.arrow_forward
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal Littell