3. Determine whether the following sets are open, closed, both, or neither. (a) (2,3) U{4} (b) [2,3] U {4} (c) Z (d) Q (e) {x e R: x < 0}

Q: 4a(7a²-5a-7)+8a³+4a²+4a-15 For a = -3

A: To evalaute the value of given expression at the given value of a.

Q: I get the first part. How do you do the second part which says find x and 7

A:

Q: algebra

A: We will find the quotient.

Q: 6 18 6 18 2x-11 15

A: The given figure is:

Q: 5Vx+8=20 how to find x=?

A:

Q: 2. (x-11)(5x-4)(x-3)

A:

Q: Perform the indicated operation.Simplify the result 4/ t+1 - (4t-7/ t2+7t+6 + 6/ t+6)

A: Given, 4/ t+1 - (4t-7/ t2+7t+6 + 6/ t+6) Opening the small bracket by multiplying the -1 4/t+1 - 4t…

Q: 2x3 +x+18 =0

A: The given function is of degree 3 so, it has three roots real or complex.   Here we have to find…

Q: I can't see the answer for b

A: From the given diagram:

Q: 2x + 5 =7

A: I hope the question is to solve for x from the provided algebraic expression.

Q: The table shows the movement of a stock for 30 randomly selected trading days. "Up" means the stock…

A:

Q: 6 15-xl dx Explain me! Please Evaluate.

A: We have to evaluate the definite integral:   ∫065-x dx

Q: 2 2 p = 60 - 2x and p = x + 9x + 30

A: