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Answers by Karla R.

Use Margin of Error formula E =±tα/2 (s/√n) since σ unknown 99% CI ==> α=.01 ==> α/2 =.005 degrees of freedom=n-1=7-1=6 Looking at table for t-distribution at 99%C-Level, critical value = 3.707 Substitute all these values into formula: a.) E = ±3.707(0.04/√7)     ...

a.) Since eight sided and single roll gives you a math expectation of 1/8. b.) 1st roll: 1/8      2nd roll:1/8    1/8+1/8+1/8+1/8 = 4/8      3rd roll: 1/8      4th roll: 1/8 c...

X= 1st roll→     1         2      3      4      5     6                         1...

There are 20 marbles total 10 Red 10 Blue   Since the marbles are with replacement, it means each pick is independent of the other-- the probability of each pick will be the same. a.)Probability of picking red marble==> P(Red)= 10/20 (Since the marbles are...

First take x+y=14 and solve for either x or y. Then, substitute that into the other equation: Solving for y, you get:  y=-x+14 Now, substitute into x2+y2=100 ==> x2+ (-x+14)2 = 100                                              ...

graph f(x) (answer)

This is the graph of an upside down(because negative sign in front) parabola.   Since this is standard form of a quadratic equation (f(x)=ax2 + bx+ c), you can start by  finding the "x" part of the vertex:   Use the formula x=-b/2a =-3/2(-1)...

The equation  h(x)= x9 +4 is considered  a polynomial, which means can only have whole numbers as exponents. The domain of polynomials is all real numbers.

true statement (answer)

Answer is C.)Graphs have same shapes with different vertices. One vertex is (5,1) for Y= 3(x-5)2 +1 and the other is (-5,1) for Y= 3(x+5)2 +1.  

To find inverse: Step 1:Rewrite h(x) as "y" Step 2: Swap/Swicth the places of x and y Step 3: Solve for the "new" y Step 4: Rewrite y as "h-1(x)"   step 1: h(x) = -3x + 6               ...

                                       Using the quadratic formula x = -b ± √b2  - 4                                                        ...