The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. assume that the population standard deviation is 2.5 gallons. the mean water usage per family was found to be 16 gallons per day for a sample of 762 families. construct the 85% confidence interval for the mean usage of water. round your answers to one decimal place

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.