Math Answers

Carl has completed 8 math homework assignments that are all worth 20 points, and his mean score is 17. Carlos has two more 20-point homework assignments to complete before his progress report gets sent out, and he wanted to raise his mean score to an 18. Is it possible for Carlos to raise his score to an 18?

Find canonical form of Zxx +Zyy=y

 A bulb manufacturer claims that the lives of its bulbs are normally distributed with a mean of 6000 hours and a standard deviation of 400 hours. A random sample of 16 bulbs had an average life of 5850 hours. If the manufacturer’s claim is correct-

a. What is the sampling distribution of the sample mean?

b. what is the probability of finding a sample mean of 5850 or less?

the 11th term of a geometric sequence is 81 and the 14th term is 3. find the 4th term

Find the first partial derivative of

f(x,y) = "(4x-y)\/(4x+y)" at the point (4,2) for both x and y.

which trinomial is equivalent to (3x - 2) (x +4)

Find the general solution of the following differential equation using the method of

undetermined coefficients: d^y/dx^2 - dy/dx + 2y = 2cosh2x

Solve the following differential equation: 2dy/dx + y = y^3(x - 1)

Show complete solutions for each item. 

Locate the following percentile under the normal curve

Find the nearest area and the z-score.

Percentile 

a. 𝑃₇₆   

b. 𝑃₅₄   

c. 𝑃₃₄   

d. 𝑃₂₅   

e. 𝑃₉₄   

f. 𝑃₈₉   

g. 𝑃₉₀   

h. 𝑃₆₈   

i. 𝑃₁₅   

j. 𝑃₄₂   

Solve the following differential equations: (x^3+y^3)=(xy^2)dy/dx