September ACT Math Discussion

<p>Jackbenimble4</p>

<p>That’s exactly what I did. I cross verified with my matrices adding function on ti84.</p>

<p>thats what killed me on the pre cal quizzes, i always did somthing wrong on my calc</p>

<p>“@Dylan - no.”
questionmark what are you referring to?</p>

<p>^Yea, just add corresponding positions. It was like 2,5,5,8 (B).
Nitrohawk, you got it right</p>

<p>And also, most of the previous answers are the ones I got.
The imaginary numbers one is 3i, I’m pretty sure.
And the logic question was the Not, Not one. (E?)</p>

<p>@dylan Cocoa and water was integer answer, based on ratios.</p>

<p>anyone remember the (+) question?</p>

<p>i rushed through it and got 7, didnt have time to recheck it</p>

<p>it was (+) equals a+b all over 7 or something -.-</p>

<p>Cowking15</p>

<p>I ended up with 35/7 = 5</p>

<p>The (+) question was 5. Final one was 35/7, which is 5.</p>

<p>cowking, i got 5</p>

<p>questionmark: seriously? i thought the choices were all improper fractions</p>

<p>yep i got 5 too</p>

<p>I got 5 as well.</p>

<p>o yes i remember now ,i did put 5 :slight_smile: just confused the numbers in it
thx all</p>

<p>@dylan lol no it said 3cocoa 2 water and then gave u 12 cocoa how much water and it was 8</p>

<p>Park and recreation permit was 100 hiking only. You could have 700 people who got hiking and biking, 200 who got hiking and hunting, leaving 100 for hiking only.</p>

<p>Ferris wheel equation had 3 terms, it was the one with cosine.</p>

<p>Cabin paths was 45. This can be interpreted as a combination problem: how many different ways can 10 items be paired? 10 nCr 2 = 45.</p>

<p>The function relation one with the plus sign in a circle was 5 IIRC.</p>

<p>Imaginary # with largest absolute value was -3i. a was 0 for all the choices (they were in a+bi form), so the largest absolute value was the expression with the largest absolute value of b.</p>

<p>Cocoa water was 8. The ratio was 3 water/2 cocoa, but he had 12 water.</p>

<p>Logic one was the contrapositive.
If the question was “If an item is blue, it’s a cat” then the answer is “If the item is NOT a cat, it’s NOT blue”</p>

<p>Logo was 20x9 = 180.</p>

<p>james</p>

<p>the logo only asked for a portion of it right i don’t think i remember getting 180</p>

<p>180 was only the rectangle that didnt include the CO, which im reasonably sure is correct</p>

<p>@james, the only thing that im confused on any of those is the imaginary one. </p>

<p>to me the question asked which value of B would give the highest value, not which value of a+bi so to me the answer choices were entirely just B (and a or i was not tagged along)</p>

<p>seems like theres been a lot of debate on this one, and i truly hope they throw it out.</p>

<p>from all the online stuff ive looked at on imaginary numbers it seems that its just the coefficent that matters but again that isnt a confirm</p>

<p>@nitro ya the imaginary number i itself has n othing to do in the aboslute value, its just interpreting the answer choices as being B entirely, or a+bi</p>

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<p>The square part of the logo was 15x15. The rectangle’s width was 6 less than the square’s length (9), the length was 5 more than the square’s length (20). 20x9 = 180</p>

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<p>They gave four answers in a + bi form (but none of them had an “a” component). The last answer was i^2, or -1, which is obviously wrong. Absolute value of an imaginary number is sqrt(a^2 + b^2), and a^2 = 0 for all answers so the highest AV is the one with the largest b^2.</p>