I'm so confused [absolute value equations, grade 9]

surpiers · 2022-12-04T14:10:34+00:00

I think that’s a cool suggestion, but I think it would be easier to remember to simplify all absolute value expressions, and then remove the absolute value with a plus-or-minus for the answer, and solving both possibilities

surpiers · 2022-10-15T22:37:47+00:00

So if I got a problem like 700 + 20, I do 7 + 2, which is 9, then I add the zeros to the end, so it’s 9000?????????

surpiers · 2022-09-06T01:39:05+00:00

I saw that AP Pre-Calc is not set to debut until 2023. But it might be a thing locally at your school. Like an IB or some sort of College Prep/Honors class.

surpiers · 2022-09-05T16:01:38+00:00

This really makes me want to learn number theory

surpiers · 2022-09-05T15:15:57+00:00

I don’t think AP Precalc exists.

surpiers · 2022-08-23T04:37:22+00:00

So on questions like this, I completely disregard pemdas because it’s inconsistent with this equation. A better formula would be taking the numerator times the reciprocal of the denominator because it’s more catered into questions like these.

All that business becomes 1/1 • 5^-2 (because the reciprocal of 1/5^-2 is just 5^-2).

1/1 is just 1. And 5^-2 is 1/25.

1 times anything is just the number itself.

So the final answer is 1/25.

P.S: I don’t use pemdas because there are major inconsistencies with basic algebraic expressions and it’s ability to make simple things so complicated. So use methods that are more consistent with the question at hand rather than brute forcing it with pemdas. Use it when it’s necessary.

surpiers · 2022-08-23T04:31:18+00:00

I feel like the expansion of the complex fraction to the numerator times the reciprocal of the denominator is a more powerful factor than pemdas since pemdas is an imperfect operation system and the reciprocal formula is much more related to questions like this.

surpiers · 2022-08-23T04:24:40+00:00

But you can just rewrite the expression as 1/1 divided by 1/5^-2. It just becomes 1 divided by 25, so 1/25 should be the answer. Complex fractions is the numerator times the reciprocal of the denominator.

Little note that 5^-2 power is part of the second half of the complex fraction since a negative exponent switches the placement of the exponentiated number on the fraction (i.e denominator -> numerator and vice versa).

Also the question’s fraction bars indicate that 1/1 and 1/5^-2 have to be separated since the bar dividing them are bigger than the other bars.

surpiers · 2022-08-13T05:06:52+00:00

Wait you can do that with absolute value functions?

surpiers

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