1/2x + 1= -19

need help thank u guys have and amazing day
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If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?