HELPME

This is a statistics question: (A) Select a random sample of 30 student from our population (we have a data entry to get the sample from). At the 0.05 level of significance is there evidence that the average travel time is greater than 45 minutes? (B) Wha...

the life of electric bulbs has a normal distribution with a mean of 35 months and a standard deviation of 4 months. What should the warranty period be if the company that manufactures these bulbs does not want to replace more than 2% of the bulbs?

Solve the system by substitution. {-x - y - z = -8 { -4x + 4y + 5z = 7 { 2x + 2z = 4 Solve the system by elimination. {-2x + 2y + 3z = 0 {-2x - y + z = -3 {2x+ 3y+ 3z = 5

What is the solution of the system of equations? {-3x - 4y - 3z = -7 {2x - 6y + 2z = 3 {5x - 2y + 5z = 9 A. (5,-2,7) B. (-5,2,7) C.(5,2,-7) D. No solution Use a matrix to find the solution to the system of equations. {-8x - 8y = -16 {6x - 9y = -108 A.(-6,...

For what values of a, b and c does the equation ax^2 + bx + c = 0 have two distinct solutions? One solution? No solutions?

So what the answer? I’m still confused. How would I do the full equations?

Yeah can you help

Like I said can anyone just give me the correct answers?

dude u made me fail my math quiz-