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Type: Posts; User: elizabeth

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by elizabeth
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2
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2,954

Thank you!:)

by elizabeth
Replies
2
Views
2,954

### Composite functions

Composite functions SAT Subject test Math level 2

Which of the following could be h(x) given that f(x)=x^2-3 and h(f(4))=24?

(A) x+2
(B) x+11
(C) x+5
(D) x-3
(E) x-9

by elizabeth
Replies
2
Views
2,686

Thank you!
4. ## Thread: Trigonometry double angle formula

by elizabeth
Replies
2
Views
2,686

### Trigonometry double angle formula

Trigonometry double angle formula SAT Subject test Math level 2

Which of the following is the value of \frac{5}{cos^22x- sin^22x } given that cos4x=\frac{1}{2}?

(A) 5
(B) \frac{1}{2} ...

by elizabeth
Replies
2
Views
2,787

thanks!!:)
6. ## Thread: SAT subject Complex zeroes

by elizabeth
Replies
2
Views
2,787

### SAT subject Complex zeroes

Complex zeroes Subject test Math level 2
Which of the following is a factor of P(x) given that 1+i is a zero of this polynomial?

(A) 1+i
(B) 1-i
(C) x-(1+i)
(D) x-(1-i)
(E) -1-i
...
7. ## Thread: SAT math Remainder theorem

by elizabeth
Replies
2
Views
2,642

### Thanks oliver!

Thanks oliver!
8. ## Thread: SAT math Remainder theorem

by elizabeth
Replies
2
Views
2,642

### SAT math Remainder theorem

Remainder theorem

Which of the following is equal to the remainder left by the division of P(x)=2x^4-4x^3+3x^2-4x+8 by the linear polynomial x+2?
(A) 88
(B) 90
(C) 92
(D) 94
(E) 96

Thanks!

by elizabeth
Replies
2
Views
2,798

### Properties of exponents (x^m)^n=x^{mn} ...

Properties of exponents

(x^m)^n=x^{mn}

x^m x^n =x^{m+n}

So, our expression is equal to

(x^4)^5+(y^4) (y^5)=x^{4\cdot5}+y^{4+5}= x^{20}+y^{9}

by elizabeth
Replies
2
Views
2,797

### This number can be written as...

This number can be written as \frac{\sqrt4}{\sqrt7}}=\frac{2}{\sqrt{7}}=\frac{2\sqrt{7}}{7}

Therefore the correct answer is (B).

by elizabeth
Replies
2
Views
3,116

Thank you!!
12. ## Thread: sat math problem ratio

by elizabeth
Replies
2
Views
3,116

### sat math problem ratio

If x and y are two positive numbers and x is 40% less than y, what is the value of the ratio x:y?

(A) 0.4
(B) 0.6
(C) 1.4
(D) 1.6

Thanks:D

by elizabeth
Replies
2
Views
2,948

thank you!
14. ## Thread: sat math problem average

by elizabeth
Replies
2
Views
2,948

### sat math problem average

25% of the officers in a camp are senior officers and the remaining are junior officers. The monthly wage of each senior officer is $4,500 and the monthly wage of each junior officer is$3,500. What...
15. ## Thread: Sum of two numbers

by elizabeth
Replies
2
Views
2,854

### Sum of two numbers

The sum of two numbers is 14 and their product is 40. What is the value of the sum of their squares?

(A) 116
(B) 126
(C) 196
(D) 206

Thanks!!

by elizabeth
Replies
2
Views
2,288

17. ## Thread: sat math question of the day

by elizabeth
Replies
2
Views
2,288

### sat math question of the day

If -4<a<1, then which one of the following is negative?
(I) (a+4)(a-1)
(II) (-4-a)(a-1)
(III) (-4-a)(1-a)

(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only

by elizabeth
Replies
2
Views
2,176

19. ## Thread: sat math inequality question

by elizabeth
Replies
2
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2,176

### sat math inequality question

If x^2-4x>0, then which one of the following could NOT be the value of x ?

(A) -2
(B) -1
(C) 1
(D) 5

Thanks!!;)
20. ## Thread: SAT math Factoring

by elizabeth
Replies
2
Views
2,476

### SAT math Factoring

Factoring or Factorising is the process of finding the factors of an expression.
The following expression is called a difference of two squares...
21. ## Thread: SAT math exponents

by elizabeth
Replies
2
Views
2,316

### SAT math Rules of Exponents

SAT math Rules of Exponents

If a,b are positive numbers, x,y are real numbers and m,n are positive integers then:

1) a^{x+y}=a^x a^y Product Rule

2) (a^x)^y=a^{xy} Basic Power Rule

3)...
22. ## Thread: SAT math exponential

by elizabeth
Replies
2
Views
2,684

### SAT math exponentials

SAT math Exponential

First take a look to this revision notes about Exponents

http://www.ibmaths4u.com/Exponential%20and%20Logarithmic%20function.pdf

Starting with 4^x=8

square both...
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