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kayaale
Registered User Posts: **4** New Member

Hey guys!

So i finished a practice test for maths 1 from holt college.However they were a few questions which I could not understand.If anyone could help,that would be great! Its from http://репетиторвкиеве.рф/wp-content/uploads/2015/05/SAT-math-IC-no-answers.pdf and it is questions 20,30,31,34

Thanks

So i finished a practice test for maths 1 from holt college.However they were a few questions which I could not understand.If anyone could help,that would be great! Its from http://репетиторвкиеве.рф/wp-content/uploads/2015/05/SAT-math-IC-no-answers.pdf and it is questions 20,30,31,34

Thanks

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## Replies to: Maths 1 sat 2 Help!

904Member2^(a+b)+(2^a)(2^b)=2^(a+b)+2^(a+b)=2(2^(a+b))=2^(a+b+1)

If you don't know the exponent rules, you can solve with a CAS calculator, Just subtract each answer choice from

2^(a+b)+(2^a)(2^b). The choice that gives a difference of 0 is the correct answer.

904MemberSide of cube= 2r

Volume of sphere= (4/3) (pi)r^3

Volume of cube=(2r)^3=8r^3

ratio4(pi)/3/(8)= pi/6

904Membersolve(sqrt(a*x-1)-sqrt(a*x+1)=sqrt(ax),x) Enter

returns x= 2sqrt(3)/3a

4New Member4New MemberAlso is cas allowed in a sat exam?

904MemberPlugging in numbers would work fine for question 20. There are multiple ways to do these questions. You should use the method that works best for YOU.

CAS is most definitely allowed for all SAT math exams except the non-calculator part of the redesigned SAT regular test. However, if you plan to get a CAS calculator, make sure you spend plenty of time practicing with it before test day. On test day, use the calculator only for operations you have already practiced and know how to do well.

4New Member904Member