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Factor theorem

Which of the following is equal to the value of k given that the polynomial P(x)=2x^4-4x^3+(k+1)x^2-kx+8 is exactly divisible by the linear polynomial x-4?

(A) 10
(B) 11
(C) ...

Thank you:)

SAT subject mathematics Complex numbers
Which of the following is equal to i^{2013}?
(A) i
(B) -i
(C) 1
(D) -1
(E) 2i

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Thank you miranda!:D

SAT subject math 2 - Complex numbers

Which of the following is the result of the product (x-i)(x+i)?

(A) x^2
(B) x^2-1
(C) x^2+1
(D) x^2+2i
(E) x^2-2i

Which of the following is equal to the number of roots having the quadratic equation x^2+4x+4=0?

(A) 0
(B) 1
(C) 2
(D) -2
(E) -1

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Take a look to the following link
http://sat.collegeboard.org/SAT/public/pdf/getting-ready-for-the-sat-subject-tests.pdf at page 16

Hope this help!!:)

Thank you. Nice explanation!

The expression \frac{x^2-6x+8}{ x^2+3x-10} is equivalent to

(A) \frac{x+4}{ x-5}

(B) \frac{x-4}{ x+5}

(C) \frac{x+4}{ x+5}

(D) \frac{x-4}{ x-5}

Thanks!!:D

The sum of four consecutive integers is 394.
How can we Find the greatest of these numbers??

Thank you!:D:D

If the diagonal of a square measures 8 \ cm , what is the perimeter of the square?

(A) 16\sqrt{2} \ cm

(B) 18\sqrt{2} \ cm

(C) 32\sqrt{2} \ cm

(D) 64\sqrt{2} \ cm

Thank you:D

If 20% of a is equal to 40% of b and b=24, what is the value of a?

(A) 6

(B) 12

(C) 24

(D) 48

Thank you kadence!

The area of a circle is 3\pi \ cm^2. If the radius of this circle is tripled, what is the new area?

(A) 9\pi \ cm^2

(B) 18\pi \ cm^2

(C) 27\pi \ cm^2

(D) 81\pi \ cm^2

SAT math Absolute Value Inequality

\left\vert{} 2x-1 \right\vert{}\geqslant 5

In order to solve this inequality we’ll set up two inequalities.

2x-1\leqslant -5 or 2x-1\geqslant 5

2x...

SAT math Absolute Value Inequality

\left\vert{} 2x-1 \right\vert{}<5

In order to solve this inequality we’ll set up two inequalities.
Not only will we change the sign of the number on the...

SAT math multiple

A multiple is the result of multiplying a number by an integer. Consecutive multiples of 3 always differ by 3. If x+1 is a multiple of 3, then the next larger multiple of 3 will...

SAT math multiple and factors

If x+1 is a multiple of 3, what is the next larger multiple of 3?

Thanks!

SAT math divisibility

Given two integers a (dividend) and b (divisor), we can divide one by the other with a remainder: a=qb+r
the quotient, q indicates how many times b fits in a and the...

SAT math question negative numbers

-(-2a-2a-2a)=-(-6a)=6a

Hope these help!