# Search results

1. ### polynomials qn

yeah oops, i think i had a mindblank there (looking back i think i was thinking about the remainder theorem even though the remainder theorem is only for linear factors 💀 💀 💀 ). thank you!!

3. ### graphing transformations

In the old syllabus, was graphing transformations (from Further Functions I think) part of the the Preliminary Extension 1 syllabus? (Stuff such as y = |f(x)|, y^2 = f(x), |y| = f(x) and all that). Was looking through the all the past papers of the old syllabus and none of those kinds of...
4. ### perms and combs circle qn

Four boys and four girls are arranged in a circle. In how many ways can this be done, if the boys and the girls are in distinct groups? Would it be 4! x 4! (because you only need to mix around the boys and girls separately) or 3! x 4! (fix one boy first) ? I've received conflicting answers on this.
5. ### ellipse

Thanks a lot, will take note of that in the future
6. ### ellipse

A curve is defined parametrically by the equations x = cos theta + 1, y = 2sintheta - 3. (a) Find the Cartesian equation of the curve. (b) Describe the curve, and then sketch it. I ended up getting (x-1)^2 + [(y+3)^2/4] = 1 for the Cartesian equation, and while I know it's an ellipse I've no...
7. ### ellipse

are ellipses anywhere in the extension 1 course (+ more precisely, year 11 in the new syllabus)? wondering because a maths qn i'm doing is asking me to sketch an ellipse after finding its equation and i have no idea how to do it
8. ### Synonyms for...

repercussion? --> has a negative connotation
9. ### perms and combs qn

how would you do this with perms and combs? the worked solutions are using a probability tree and i think there's probably an easier way to go about this question, many thanks in advance

Thanks!
11. ### perms and combs qn

(The answer is B, and I know the total number of ways without restriction is 9C3 but I have no idea how to get to the answer, many thanks in advance)

thank you!!
13. ### motion in straight line qn

hey all, how would you do c and d? many thanks in advance (i've done a and b, and the answers are: for part a 50km/h for Car A and 20km/h for Car B, and for part b the answer is 9 minutes (t = 0.15)
14. ### vertical tangents and cusps

are you able to tell just from a given equation of a curve whether it has a vertical tangent or cusp?? if so, how?
15. ### how to interpret this question

not sure what to do with the given information + where to start, many thanks in advance

thanks!
17. ### chemistry qn

how would you do this question, and what is the answer? many thanks in advance
18. ### 9b, a bit confused (calculus)

my school posts pdfs of the worked solutions on their moodle, so they might be a teacher-only-accessible thing that they ended up sharing with us students so i'm not sure, sorry D:
19. ### continuity

how would you start this one?
20. ### Concentration

molar concentration/molarity is in the units mol L-1, so you'd need to convert the mass of hydrogen peroxide to moles first, then use c = n/v