Which step would be an appropriate first step to solve the following equation? 3
ID: 3120584 • Letter: W
Question
Which step would be an appropriate first step to solve the following equation? 3x + 5 = 18 Subtract 5 from each side of the equation. Add 5 to each side of the equation. Divide 3x and 18 each by 3. Add 3x and 5. Divide 5 by 3. A used car can be purchased for dollar 4,000 cash or credit. If a credit plan is used, the payments arc dollar 100 per month for 4 years. How much money is saved by paying cash? Dollar 4, 800 D dollar 3, 600 dollar 2, 800 dollar 800 dollar 80 Fernando noticed that the number of phone calls he made each month was related to the number of text messages he sent that month. He plotted the relationship on the following scatter plot. Which linear equation best describes the relationship? y = 1/2 x + 30 y = -x+30 y = -x + 60 y = -1/2 x + 30 y = -1/2 x + 60Explanation / Answer
(7) The first step is to subtract 5 from each side of the equation i.e. option A is the correct answer.
After above step we get 3x = 13
(8) The total amount paid through credit = $(12*100*4)
= $4800
Amount to be saved by paying through cash = $(4800 - 4000)
=$800
option D is the correct answer.
(9) (10,25) (20,20) and (40,10) are the points plotted on the graph .
All the above points are satisfied by the equation y = - x/2 + 30
option D is the correct answer.
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