A student solved 3x−4=x7 in six steps, as shown.
Step 1: 3=x(x−4)7
Step 2: 2...
Mathematics, 09.04.2020 00:18, aprilkenedy12
A student solved 3x−4=x7 in six steps, as shown.
Step 1: 3=x(x−4)7
Step 2: 21=x(x−4)
Step 3: 21=x2−4x
Step 4: 0=x2−4x−21
Step 5: 0=(x−7)(x+3)
Step 6: x=−3, x=7
Which statement is an accurate interpretation of the student's work?
A The student solved the equation correctly.
B The student made an error in step 2.
C The student made an error in step 5.
D Only x=7 is a solution to the original equation.
Answers: 3
Mathematics, 21.06.2019 19:00, cassie2021
What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2
Answers: 2
Mathematics, 21.06.2019 22:30, coolcat3190
What is 1.5% of 120 or what number is 1.5% of 120
Answers: 2
Mathematics, 21.06.2019 22:30, badpotterchris
60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?
Answers: 1
Mathematics, 26.03.2021 18:40
Business, 26.03.2021 18:40
Mathematics, 26.03.2021 18:40
Advanced Placement (AP), 26.03.2021 18:40
Mathematics, 26.03.2021 18:40