University students were surveyed randomly in their opinion regarding a recent tuition increase. the minimum age required with 18 the maximum age is 45. use the range rule of thumb to estimate the standard deviation of the ages.

Solution: We are given that the minimum age required is 18 and the maximum age required is 45.

The range rule of thumb states that range is about four times the standard deviation.

Where s denotes the standard deviation.

Therefore, using the range rule of thumb, the standard deviation is 6.75

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions