Solve for y and x

3x+4y=18.50. 5x+8y=14.50

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

What is the correct decimal form of 12%