Math 7 Unit 3 Review Block__ Name____________________________ Date ________________ Topics to review: Order of operations, Evaluating Expressions, and Translating algebraic expressions and equations. 1) 2 (12) 82 7 7 81 9 2) When simplifying the following, using order of operations, which operation should be performed first? 2 + 3 x 72- 12 -8(10) ÷ 40 • -2 3) For the expression above, which answer lists the operations in the order in which you should perform them? A: B: C: D: Multiplication, Division, Subtraction, Multiplication Multiplication, Subtraction, Multiplication Multiplication, Division, Multiplication Multiplication, Multiplication, Division 4) -2(6 - 10)2 + 100 10 6) The value of 4 ∙ 2𝑥 − 5 when x = 3 2 5) What is the value of the expression? (8 5) 4 7) The value of (𝐵 + 𝑏)ℎ when B = 3, b =5 and h = 4 1 4 8) 25+30÷6 35÷7(3) 9) The value of 9𝑦 2 − 4𝑥 when x = -4 and y = 1 11) The value of 𝑥 2 + 4𝑥 − 6 when x = -5 12) 12) 14) 14 + 40 ÷ 4 24 ÷ 6 ∗ 2 14) 2 9 − 12 + 5 ∗ 2 5 − 42 ÷ 4(2) 2 10) 25 + 8 ÷ 2 ∗ 4 − 3 13) 92 − 3 ∗ (7 − 9) 3 −4 + 3(5 + 2 ) 15) The value of 2(𝑥 + 3)2 + 5𝑥 when x = -1 15) The value of 6𝑘 3 + 3𝑑 when k = -1 and d = -2 1 16) (9 − 4)2 − 5 ∗ 5 4x 5 y 2y if x 6 and y 2 ? 26.5 8.5 3.5 0.5 17) What is the value of a. b. c. d. 18) What is the value of x 2 2 x 3 if x 6 ? e. 27 f. 42 g. 51 h. 60 20) What is the value of 3 2 x 5 y if x 2 and y 3 ? m. n. o. p. 21) What is the value of a(b c) if a 2, b 3, and c 2 ? 19) What is the value of x 5 y if x 4 and y 2 ? i. j. k. l. q. r. s. t. 18 22 28 36 22) 23) 24) 4x + 3y – 5d + 13 How many terms? 25) What is the coefficient of d? What is the constant? Is this an expression, equation or inequality? -33 -27 33 57 2 -2 -4 -10 Translate the following phrases into mathematical expressions or equations. 26) “the quotient of a number and three, minus a number is fifteen.” 27) “Five plus a number” 28) “Nine minus the product of seven and a number” 29) “The product of a number and eight equals three” 30) “the difference of a number and three is fifteen.” 31) “Five more than a number” 32) “Nine divided by the product of seven and a number” 33) “The sum of a number and eight results in three 34) “five less than a number” 35) Which of the following is false? a. 4x + 3 is an expression b. 5x + 2 = 12 is an equation with 3 terms c. 4f – 12 is an inequality with two terms d. 12f has no constant 36) Which of the following is true? a. 12f is an expression with 12 as a constant b. 12f is an expression with f as a coefficient c. 12f is an expression with 12 as term d. 12f is an expression with 12 as a coefficient 37) 8d + 15f – 12 > 13g a. What are the variables? ___________ b. How many terms? ______________ c. What is the constant? _____________ d. Is the following an expression, inequality or equation? ______________