Which equation contains a perfect square trinomial? X^2 - 6x +72=0

X^2-5x+ 64=0

X^2 + 14x+49=0

X^2+2x-4=0

Tom and maria typed in words in the ratio of 1 : 5 in 20 minutes. they typed 864 words altogether. find the number of words that each of them typed

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

At 6 1/2 cents per pound of string beans how much does 7 pounds cost