**Question 21 – “Running at the same constant…”**

OG Explanation is fine.

Khan Academy Link OG 11th Edition #19 - Begins at 9:10

**Question 22 – “Of the five coordinates….”**

OG Explanation is fine.

Khan Academy Link OG 11th Edition #20 – Begins at 0:00

**Question 23 – “If n is a prime number…”**

OG Explanation is fine.

**Question 24 – “1/(1+1/3) + …”**

OG Explanation is fine.

**Question 25 – “In the figure above…”**

OG Explanation is fine.

Khan Academy Link OG 11th Edition #23 – Begins at 8:30

**Question 26 – “A rope 40 feet long is cut into….”**

OG Explanation is fine.

Khan Academy Link OG 11th #24 – Begins at 0:00

**Question 27 – “A student’s average…”**

OG Explanation is fine.

**Question 28 – “The average distance between….”**

OG Explanation is fine.

**Question 29 – “If the quotient a/b is positive…”**

OG Explanation is fine.

Khan Academy Link – OG 11th Edition #26 – (3:00)

**Question 30 – “The dots on the graph…”**

OG Explanation is fine.

Khan Academy Link – #27 - Begins at 4:20

**Question 31- “How many minutes does it take John to type…”**

OG Explanation is fine. Picking numbers is another option. Say John types 20 words at a rate of 10 words per minute. It must take him 2 minutes. Only B works here.

Khan Academy Link – 11th Edition #28 – 7:35

**Question 32 – “Square root of 16(32)….”**

OG Explanation is fine

Khan Academy Link – 11th Edition #29 – 9:10

**Question 33 – “If O is the center…”**

OG Explanation is fine.

Khan Academy Link – #30 – Begins at 0:00

**Question 34 – “If Juan takes 11 seconds to…”**

OG Explanation is okay. We could just pick numbers. Let y = 2 and x = 4. His total time should be 22 seconds.

Choice A: 11(4) / 2 = 22, CORRECT (looks good but just to make sure another answer doesn’t equal 22)

Choice B: 11(2) / 4 = 22/4 INCORRECT

Choice C: 4 / (2(11)) = 4/22 INCORRECT

Choice D: 11 / (2(4)) = 11/8 INCORRECT

Choice E: 2(4) / 11 = 8/11 INCORRECT

Khan Academy Link – OG 11th Edition #31 1:40

**Question 35 – “John has 10 pairs of matched…”**

OG Explanation is fine.

Khan Academy Link – OG 11th #32 – 3:50

**Question 36 – “What is the lowest…”**

OG Explanation is fine.

Khan Academy Link – OG 11th #33 – 6:10

**Question 37 – “1/(.75..)**

OG Explanation is fine. Alternatively we could keep the decimal in the denominator.

**Question 38 – “If 1.5/0.2….”**

OG Explanation is fine.

Khan Academy Link #35 – Begins at 9:40

**Question 39 – “In the figure above…”**

OG Explanation is okay.

Khan Academy Link #36 – Begins at 0:00

**Question 40 – “If n is an integer, which…”**

OG Explanation is fine.