Hal wants to buy a cake for his friend's birthday. When he went to the bakery, he found that price was marked down by 10%. If Hal pays $30, what was the original price? Help plzz

What is the vertex form of f(x) = x2 + 6x + 3

Deshawn uses 3/4 of a box of rice to cook dinner the portion he uses weighs 12 ounces right and solve an equation to find the weight of the full box of rice

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?