Answer:
A) what did the student do wrong, explain why they are incorrect
B) Demonstrate and explain the correct way to answer the question.
Lauren says that two expressions 3x+4(2x+5) and 6x +5x +5 are equivalent. Simplify the expressions to determine whether or not Lauren is correct. Substitute a value for x to see if she is right.
<u>3x+8x+20 = 6x+5x+5</u>
<u>11x+20 = 11x+5</u>
<u>She is wrong</u>
Students answer: She is correct because both equal 11x +5. I substituted x=2 and got 27 for both
<u>She is wrong because 27 will be the answer for ' 11x+5' only. The correct method should be </u>
<u>x=-15 </u>
Step-by-step explanation:
Answer:
7. 2|x+2|-1
8. (-2,-1)
10. y≥2
Step-by-step explanation:
7. a|x-h|+k
Vertical stretch by a factor of two, horizontal shift left two, vertical shift down one
8. (h,k)
10. It should be y, but otherwise you are good
g(x) = 0
This is asking at what x value does y = 0. g(x) = y
y = 0, when x is 6
4.28 is your short answer but your complete answer is 4.28571428571
