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# SAT Algebra And Functions - Basic

If $$x$$ is a non-zero number such that

$\frac{ 10}{y} = \frac{ 10+x} { y + x },$

what is the value of $$y$$?

A) 10
B) 5
C) 0
D) -5
E) -10

$\frac{ 1}{4}y + 12 = 0$

What value of $$y$$ satisfies the above equation?

A) $$-48$$
B) $$- 12$$
C) $$- 4$$
D) $$12$$
E) $$48$$

Economists are tracking the price of a burger at a fast food chain. In 1990, the price was $5.00. It has gone up by$0.10 ever year. If this continues, in what year will the price of the burger be \$8.50?

The dollar cost of producing $$n$$ tractors in a month is given by

$C(n) = 1000 + 200n + 30 n^2.$

What would be the dollar cost of producing $$10$$ tractors in a month?

A) $$230$$
B) $$1230$$
C) $$3300$$
D) $$6000$$
E) $$321000$$

A company's profit $$P(x)$$, in dollars, for producing $$x$$ cameras in one day is given by

$P(x) = 300 x - 20 x^2.$

If the company produces 10 cameras in one day, what would be their profit for that day?

A) $$10,000$$
B) $$6, 000$$
C) $$3, 000$$
D) $$2, 000$$
E) $$1, 000$$

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