Math Answers

3p+2q=5
q-p=5

Let f be the function from {a, b, c, d} to {1, 2, 3} defined by f(a) = 3, f(b) = 2, f(c) = 1, and f(d) = 3. Is f an onto function?

f is the function from {a, b, c} to {1, 2, 3} such that f(a)=2, f(b)=3, f(c)=1. Is f invertible, and if it is, what is its inverse?

It costs a bakery $6 to bake a cake. If it sells on the first day, the bakery charges $15. If it sells on the second day, it charges $9. Otherwise, the cake is thrown out. The chance that a cake will sell on the first day is 65% and the chance that it will sell on the second day is 23%. How much profit (or loss) will the bakery make on each cake?

Determine all values of the constant a for which the following system has (a) no
solution, (b) an infinite number of solutions, and (c) a unique solution.
ax1 + x2 + x3 = 1,
x1 + ax2 + x3 = 1,
x1 + x2 + ax3 = 1.

the total cost of two calculators and four math sets is R440.00. If a calculator costs R40 more than a math set, what is the cos of each?

6/15d+9/30d-1/6d=d+1.5-2/12d

determine f'(x) if f(X)=(x^3-2x+1)^5

(1) Evaluate exactly tan (Arccos 2/3)

(2) Evaluate exactly cos (Arcsin 1 + Arccos 1/2)

(3) Determine arcsin 1/√2
Careful: that is arcsin and not Arcsin, so there are going to
be infinitely many answers. You need to give all of them.

(4) Evaluate exactly sin( 1/2 Arcsin 4/5)

(5) Use a calculator to determine Arctan 10 in radians to two decimal places.

what is 5 plus 3?
so show your work for an right grade