5. the second side of a triangle is 3 more than 2 times the length of the first. the third side is
cm long. the perimeter of the triangle is 23 cm. what is the length of the first side of the
triangle?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?