Practice test 2, section 3 Q10, the answer is C (which you can easily obtain by plugging in x = 0) but is there another way to do or it some other logic you can use?
Thank you!
Hey Mike, could you please help me with practise test 8, section 4 question 38? If you simply plug in P as 152, it’s easy to get the answer. However, im not sure what “if P approximates the values in the table to within 10 micrograms per milliliter” exactly means? How does that statement help me to solve the question or change the numbers I’m inputting as P?
Thank you so much!
Hi Mike. How would you do practise test 8, section 3 question 11? Can you explain the whole polynomials to an odd/even degree etc. The collegeboard answer was a little confusing
Thank you!
KHAN Q:
A memory chip is designed to hold a number of transistors and heat sinks. There must be at least 1 heat sink for every 2000 transistors to prevent overheating. Also, each transistor has an area of 2.0 x 10^-10 mm^2, each heat sink has an area of 3.6 x 10^-6 mm^2, and the total area of transistors and heat sinks must be at most 2 mm^2. What is the approx. max. # of transistors that the chip can hold according to this design?
A. 2.78 x 10^2 B. 5.56 x 10^5 C. 1.0 x 10^9 D. 1.0 x 10^10
Ans=C. S.O.S, PLZ!
What’s the fastest way to do question 9 from practise test 2 section 3?
Thanks!
How would you do practise test 3, section 3, question 16? I plugged in 1 and happened to get the answer. But is there an algebraic way to do it?
Thanks!
Hi Mike. Just wondering if you had video solutions for the algebraic manipulation practise questions?
What’s the best and fastest way to do practise test 3, section 3, question 15? How would you interpret the equation? (which I find very confusing and difficult)
Thank you
Hello, I know you’ve already solved practise test 2, section 4 question 29 (by either using your graphic calculator or by looking at the equation of a parabola) but how would you use backsolving? Lets say I try in option C and im getting y as 3 (which means my equations do NOT have 2 real solutions), how do I know whether to try out option B or D next?
Thank you so much!
Hi Mike! For practise test 2, section 3 Q6, how exactly could I use backsolving to solve this? Lets say I start with C and I plug in 8. My gradient of line l is 2/5. If I plug in p as 8, I’m getting gradient of line k as 4/8. Do I now compare the fractions? How do I know if I should try plugging in a bigger or smaller number to get closer towards 2/5 (initial gradient)?
Thanks!
Hi. Please, explain the solution to this question:
If the slope of a linear equation f(x) is 2 and the y intercept is -2, then what is the y intercept of 3f(x-2)-3
Hi. Please can you explain test 3,section 4, number 35? Thank you
official practice test 3 section 4 q.no.35 how to solve?
Hi Mike. I bought your math guide about a month ago, and it’s great! I do have a question about the daily PWN #5. The explanation says that solutions exist in all quadrants except quadrant IV. But how this helps you come up with the conclusion that a>0 and b>0?
Thank you!
Hello, I am having trouble with the explanation for Angles, Triangles, and Polygons problem #2 on page 343. To get the answer to this problem, I multiplied 180*4, as there are four sets of angles that each make up a straight line, and the question asks for their sum. The solution seems to be getting at this, but instead of saying “180° x 4=720°” it says “180°.4 x 180° = 720°”. (I can send you a picture if you want.) Is this a typo, or am I misunderstanding?