Hi I need help with this question if you don't know the answer please don't answer 3x-4y=20
a. slope:3/4: y-intercept:-5
b. slope:1/20: y-intercept:3/4
c. slope:3/4: y-intercept:20 Please chose an answer out of A-D and show your work
d. slope:3: y-intercept:3/4

Which of the following is the true for f(x) = 5cos

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.