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  1. Thank you!!:)

    Thank you!!:)
  2. Distance between two points SAT Subject test Math

    Distance between two points in 3-D space. SAT Subject test Math level 2

    Which of the following is the distance between the points A(1,2,3) and B(-1,-4,0) ?

    (A) 4
    (B) 5
    (C) 6
    (D) 7 ...
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    Thanks miranda!:)

    Thanks miranda!:)
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    x-intercepts SAT Subject test Math

    x-intercepts SAT Subject test Math level 2

    How many x-intercepts has the graph of f(x)=3x^-x^3+6x^2+5x-2 ?

    (A) 0
    (B) 1
    (C) 2
    (D) 3
    (E) 4
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    Thank you!!:D

    Thank you!!:D
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    Function SAT Subject test Math

    Function SAT Subject test Math level 2

    How many x-intercepts has the graph of f(x)=x^5-3x^3+x^2+9 ?

    (A) 0
    (B) 1
    (C) 2
    (D) 3
    (E) 4
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    Thanks Brynlee!!

    Thanks Brynlee!!
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    1,835

    inequality with absolute value

    Which of the following is true given that |x+4|>5?

    (A) x>1

    (B) -9<x<1

    (C) x<-9 \ or \ x>1

    (D) x>1 \ or \ x<-9
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    1,956

    Thanks Brynlee!!

    Thanks Brynlee!!
  10. Replies
    2
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    1,956

    absolute value inequality

    Which of the following is true given that |x+4|<5?

    (A) x<1

    (B) -9<x<1

    (C) x<-9 \ or \ x>1

    (D) x<1 \ or \ x>-9
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    Thanks Brynlee!!

    Thanks Brynlee!!
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    2,038

    perpendicular lines SAT math

    Which of the following is the equation of the line that is perpendicular to line 2x+3y=9 and passes through the point (1,2)?

    (A) y=-\frac{2}{3}x+\frac{1}{2}

    (B) y=-\frac{3}{2}x+\frac{1}{2}
    ...
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    Using properties of exponents and logarithms we...

    Using properties of exponents and logarithms we have the following

    4^a \cdot 4^b =7^{2c} \Rightarrow 4^{a+b}=7^{2c} \Rightarrow

    log(4^{a+b})=log(7^{2c})\Rightarrow (a+b)log4=(2c)log7...
  14. Thread: Conic Sections

    by nicole
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    2,467

    The general formula of a circle is ...

    The general formula of a circle is

    (x-x_{0})^2+(y-y_{0})^2=r^2, with center (x_{0},y_{0}) and radius r.

    The given formula can be rewritten as

    (x-1)^2=9-y^2 \Rightarrow (x-1)^2+y^2 =3^2...
  15. Thread: median question

    by nicole
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    The fastest and most reliable way to answer this...

    The fastest and most reliable way to answer this question is by using GDC(Graphic Display Calculator).

    All GDCs has a function that calculates the median of a number list.

    For example, the...
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    We know that sec(x)=\frac{1}{cos(x)}. So, ...

    We know that sec(x)=\frac{1}{cos(x)}.

    So, sec(x)=\frac{1}{cos(x)}=\frac{5}{2} \Rightarrow cos(x)=\frac{2}{5}

    From the following trigonometric identity
    (sin(x))^2+(cos(x))^2=1

    we can...
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    1,796

    In order to find the slope of a line we must...

    In order to find the slope of a line we must rewrite the equation to slope-intercept form i.e. y=ax+b where a is the slope.

    So, the equation can be written as -5y=4-2x \Rightarrow ...
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    1,809

    The composition of these three functions is given...

    The composition of these three functions is given by

    f(g(h(x)))= f(g(\sqrt{x}))= f((\sqrt{x})^2-2)= f(x-2)= x+2

    Therefore the correct answer is (A).

    Hope these help!!:)
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    In order to find the x-intercepts of this...

    In order to find the x-intercepts of this parabola we must set y=0 and then solve the quadratic equation using GDC.

    For example, the commands for Casio FX-9860G II to solve a quadratic equation...
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    1,701

    The vertex form of a parabola with equation...

    The vertex form of a parabola with equation y=ax^2+bx+c is given by y=a(x-v)^2+k where the vertex has coordinates (v,k).

    Therefore the correct answer is (C).

    Hope these help!!:)
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    a@a@a= a@(a@a)= a@ ((a+a)^2-a) = a@ (4a^2-a)=...

    a@a@a= a@(a@a)= a@ ((a+a)^2-a) = a@ (4a^2-a)= (a+4a^2-a)^2-a

    = (4a^2)^2-a=16a^4-a

    Therefore the correct answer is (D).

    Hope these help!!:)
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    The base of a logarithm must be greater than zero...

    The base of a logarithm must be greater than zero and different than one.

    x-2>0 \ and \ x-2\neq 1 \Rightarrow x>2 \ and \ x\neq 3

    The argument of a logarithm must be greater than zero.

    ...
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    1,495

    In order to find the slope of a line we must...

    In order to find the slope of a line we must rewrite the equation to slope-intercept form i.e. y=ax+b where a is the slope.

    So, the equation can be written as -5y=4-2x \Rightarrow ...
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    1,502

    If a

    If a<0 and b\geq 0 then ab\leq 0.

    So, the value of ab could be equal to zero when b= 0.

    Therefore the correct answer is (A).

    Hope these help!!;)
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    The function is undefined when the value of the...

    The function is undefined when the value of the denominator is equal to zero. The roots of the quadratic equation x^2-5x+6 =0 are x=2 \ or \ x=3.

    Therefore the correct answer is (A).

    Hope...
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