X+2/X+3+x-3/x-2=5/6plz help​

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

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.

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6