May 22, 2015

Homework Help: Precalculus

Posted by Jake on Tuesday, January 10, 2012 at 4:31pm.

Could someone help/verify these answers~

Thanky you!

1.What is the range of the reciprocal function of f(x)=10-x^2?

a) {YER|y≥1/10}
b) {YER|y≥10}
c) {YER|1/10≤y<0}
d) YER|y<0 or y≥1/10}

Answer: D?
2. It takes Franc 2 hours longer than jane to carpet a certain type of room. Together they can carpet that type of room in 1 7/8 hours. How long would it take for Frank to do the job alone?

a) 1 1/4 hours
b) 3 3/4 hours
c) 3 hours
d) 5 hours
4. Solve 4x/x-2 = 3x-2/x-2 for x.

a) x= -1/2
b) x= -2, 2
c) x= -2
d) x=2

Answer: B
5. How many solutions does this equation (x+5)/(x-3)-1/x = 4/(x^2-3x) have?

a) 0
b) 1
c) 2
d) 3

Answer: C
6. The inequality 3x-2<(x+4)/(x-2) is equivalent to which of the following?

a) 3x^2 - 9x + 8<0
b) (3x^2-9x+8)/(x-2)<0
c) 3x^2-9x>0
d) (3x^2 - 9x)/(x-2)<0

Answer: D


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