Solve Precalculus Problems | Expert Help Available

Add the following two complex numbers: ${\displaystyle (3+2i)+(5-3i)}$. What do you notice?

Integral Calculus: Trigonometry and Inverse Trigonometry. Evaluate the following
${\displaystyle \int {\csc }^{6}udu}$

What are the values of these sums, where S={1,3,5,7}?
a)${\displaystyle \sum _{j\in S}j}$
b)${\displaystyle \sum _{j\in S}{j}^2}$
c)${\displaystyle \sum _{j\in S}\left(\frac{1}{j}\right)}$
d)${\displaystyle \sum _{j\in S}1}$

Integral Calculus: Trigonometry and Inverse Trigonometry. Evaluate the following.
${\displaystyle \int \frac{\sin \theta (\cos \theta +4)d\theta }{1+{\cos }^2\theta }}$

Factor ${\displaystyle 2x^2+x-1}$

Simplify ${\displaystyle {(1+i)}^2}$.

Multiply, please:
${\displaystyle {(x+h)}^3}$

How do you factor ${\displaystyle x^3-8}$?

Simplify the expression ${\displaystyle 1+{\tan }^2\left(x\right)}$.

What are the relationships between ${\displaystyle det(A+B)}$ and A+B?

The region is bounded by the graph of the function:
${\displaystyle f\left(x\right)=\frac{2}{1+x^2}}$
x=-1, x=1
Tell the exact area.

Determine whether the geometric series is convergent or divergent.
${\displaystyle 10-4+1.6-0.64+\dots .}$
If it's convergent find its sum.

1. Assume a binomial probability distribution has p = 0.60 and n = 200. a. What are the mean and standard deviation? b. Is this situation one in which binomial probabilities can be approximated by the normal probability distribution? Explain. c. What is the probability of 100 to 110 successes? d. What is the probability of 130 or more successes? e. What is the advantage of using the normal probability distribution to approximate the binomial probabilities? Use part (d) to explain the advantage

What is ${\displaystyle i^3}$?

Given cyclic permutations:
${\displaystyle \sigma =\left(123\right)}$,${\displaystyle {\sigma }_2=\left(45\right)}$,
then what are the inverse cycles ${\displaystyle {\sigma }^{-1}}$, ${\displaystyle {\sigma }_2^{-1}}$

What does this notation mean?
${\displaystyle \left||\frac{\partial x}{\partial s}\times \frac{\partial x}{\partial t}|\right|}$

What does it mean:
p(x|y)?

Tell, please, what are the ${\displaystyle \prec }$ and ${\displaystyle \succ }$ operators for when you use it with matrices?

A average Teenager texts about 30 messages a day with a Standard deviation of 10. (a) How many Teenagers would text more than 35 messages a day? (b) How many Teenagers would text less than 20 messages a day (c) How many Teenagers would text between 21 and 34 messages a day?

The curves ${\displaystyle r_1\left(t\right)=⟨t,t^2,t^3⟩\text{and}{r}_2\left(t\right)=⟨\sin t,\sin 2t,t⟩}$ intersect at the origin. Find their angle of intersection correct to the nearest degree.