SAT Math : SAT Mathematics

Study concepts, example questions & explanations for SAT Math

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Example Questions

Example Question #424 : Algebra

Which of the statements describes the solution set for 7(x + 3) = 7x + 20 ? 

Possible Answers:

x = 0

x = 1

All real numbers are solutions.

There are no solutions.

Correct answer:

There are no solutions.

Explanation:

By distribution we obtain 7x – 21 = – 7x + 20. This equation is never possibly true.

Example Question #1184 : Algebra

Will just joined a poetry writing group in town that meets once a week. The number of poems Will has written after a certain number of meetings can be represented by the function , where  represents the number of meetings Will has attended. Using this function, how many poems has Will written after 7 classes?

Possible Answers:

Correct answer:

Explanation:

For this function, simply plug 7 in for  and solve:

Example Question #2801 : Sat Mathematics

If f(x)=x^{3} +\frac{4}{x} + \frac{x^{2}}{2} what is

Possible Answers:

Correct answer:

Explanation:

f(x)=x^{3} +\frac{4}{x} + \frac{x^{2}}{2}

f(4)=4^{3} +\frac{4}{4} + \frac{4^{2}}{2}

f(4)=64 + 1 + 8

f(4)=73

Example Question #2802 : Sat Mathematics

If , find the value of .

Possible Answers:

Correct answer:

Explanation:

f(4) = 4 + 1/4 = 16/4 + 1/4 = 17/4

Example Question #2803 : Sat Mathematics

If  and , what is ?

Possible Answers:

100

20

104

132

19

Correct answer:

132

Explanation:

g is a function of f, and f is a function of 3, so you must work inside out.

f(3) = 11

g(f(3)) = g(11) = 121 + 11 = 132

Example Question #2804 : Sat Mathematics

Jamie buys a new fish tank. It is 45% full. She adds seven more liters of water, and it is 65% full. What is the capacity of Jamie's new fish tank?

Possible Answers:

27 liters

22 liters

35 liters

None of the other answers are correct.

48 liters

Correct answer:

35 liters

Explanation:

The algebraic expression for x, the capacity of the fishtank is:

0.45x+7=0.65x

0.45x+7-0.45x=0.65x-0.45x

0.2x=7

0.2x\times\frac{1}{0.2}=7\times\frac{1}{0.2}

x=35\hspace{1 mm}L

The capacity of the fishtank is 35 liters.

Example Question #2805 : Sat Mathematics

 

 

 

 

Possible Answers:

Correct answer:

Explanation:

When we multiply a function by a constant, we multiply each value in the function by that constant. Thus, 2f(x) = 4x + 12. We then subtract g(x) from that function, making sure to distribute the negative sign throughout the function. Subtracting g(x) from 4x + 12 gives us 4x + 12 - (3x - 3) = 4x + 12 - 3x + 3 = x + 15. We then add 2 to x + 15, giving us our answer of x + 17.

Example Question #61 : How To Find F(X)

Given the following functions, evaluate .

Possible Answers:

Correct answer:

Explanation:

Example Question #2806 : Sat Mathematics

The point is one of the points of intersection of the graphs of  and .  Given that  and , find the value of .

Possible Answers:

Correct answer:

Explanation:

Since it’s given than , we know that .  We now know that (3, 7) is a point of intersection.  Therefore,  as well.  In other words, , so .

Example Question #63 : How To Find F(X)

Consider these functions:

Which of the following is equivalent to ?

Possible Answers:

Correct answer:

Explanation:

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