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Which value of b would make #16x^2 bx+25# a perfect square trinomial?

Question #918e5

How do use the binomial theorem to calculate 6C4?

What is value of #X# such that #P(X < Z < X)=0.95#?

Show that #10^logx = x# ?

Ruby red paint costs $0.50 per square inch. A ball is painted ruby red and costs $100.00 to paint. What is the diameter of the ball?

How do you graph #x+4y=8#?

Question #6074d

How do you solve #5 \frac { a  11} { a + 4} = \frac { a ^ { 2}  1} { a + 4}#?

How do you solve #18\leq 6 4x \leq 10#?

Question #28946

Question #da9aa

Question #9eb47

The length of human pregnancies from conception to birth varies according to a distribution that is normal with mean 266 days and standard deviation 16 days. Between what values do the lengths of the middle 95% of all pregnancies fall?

How do you write a rule for the nth term of the arithmetic sequence #a_7=21, a_13=42#?

Sin^4xcos^4x=
cos2x or cos2x??

Can you help me ?

Question #f3cab