Sunday
April 20, 2014

Homework Help: Algebra

Posted by nash on Saturday, May 5, 2012 at 10:08am.

1.Solve 2x = 5x2
for x.
A. 2.322
B. 0.431
C. 0 and 2.322
D. 0 and 0.431

2.Which of these is a factor of 2x100 − x7 − 1?
A. x
B. x − 2
C. x + 1
D. x − 1

3.If P(x) is a polynomial with P(–6) = –1.12 and P(–5) = 0.6 then which of the following must be true?
A. There is a zero for P(x) between x = –6 and x = –5, but it may be a complex number.
B. There is a zero for P(x) between x = –6 andx = –5.
C. There is a zero for P(x) between x = –1.12 and x = 0.6, but it may be a complex number.
D. There is a zero for P(x) between x = –1.12 and x = 0.6.

4.the pH of a solution is given by the formula –log c, where c is the concentration of H+ in
gram-ions per liter. Find the pH when that concentration is 5.3 x 10–7.
A. 8.11
B. 7.72
C. 6.28
D. 5.84

5.Find the negative root of x2 − 3 = 0 to the nearest tenth.
A. 1.4
B. 1.7
C. –1.7
D. –1.4

6.An account with $300 in it has been earning 3% annual interest compounded continuously for 10 years
with no deposits or withdrawals in that time. How much was in the account 4 years ago?
A. $77.75
B. $222.25
C. $266.08
D. $338.25

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