Humra12hh
51

# 1. What is the value of z in the equation 5z – 9 = 36? (4 points) 4 5 6 9 2. What is the value of z in the equation 5(2z + 4) = 0? (4 points) -2 0 2 20 3. What is the value of a in the equation 4a + 3(a + 1) = 24? (4 points) 2 3 7 21 4. An equation is shown below: 3(4x + 5) = 12 Which of the following correctly shows the beginning steps to solve this equation? (4 points) Step 1: 12x + 15 = 12 Step 2: 12x = –3 Step 1: 12x + 5 = 12 Step 2: 12x = 7 Step 1: 7x + 5 = 12 Step 2: 7x = 7 Step 1: 7x + 8 = 12 Step 2: 7x = 4 5. How many solutions can be found for the equation 4x – 8 – 4x = 9? (4 points) Zero One Two Infinitely many

Question 1: 5z – 9 = 36 5z = 45 z = $\frac{45}{5}$ z = 9 Hence, the answer is D. Question 2: 5(2z + 4) = 0 10z + 20 = 0 10z = -20 z = $\frac{-20}{10}$ z = -2 Hence, the answer is A. Question 3: 4a + 3(a + 1) = 24 4a + 3a + 3 = 24 7a = 21 a = $\frac{21}{7}$ a = 3 Hence, the answer is B. Question 4: 3(4x + 5) = 12 12x + 15 = 12 12x = 12 - 15 12x = -3 x = $\frac{-3}{12} = - \frac{1}{4}$ Hence, the answer is A. Question 5: 4x – 8 – 4x = 9 -8 ≠ 9 Hence, the answer is A.