Find the mean of the

set of numbers:

15, 13, 12, 12, 20

How do I solve these two linear systems using substitution? x + 24 = 4 y = 1/3x - 3

Write a two-column proof given 2x + 6 96 prove: x = 46

Evaluate 9/m+4 when m=3

Solve - 2 (2x + 5) - 3 = - 3 (x - 1).

Is the statement [x]=[x+1] true for all real numbers? explain

Name the property of real numbers illustrated by the equation 2x + 4y = 4y + 2x.

Lilia meets her cousin Carmen and starts chatting a few minutes later. Mariene, who is Carmen's cousin, can affirm that: a-marlene is aunt of lilia b-lilia may be cousin of marlene c-marlene may be lilia's mother d-carmen is older than lilia e-lilia

Naughty spent $28 on 2 DVDs at this rate how much would five DVDs cost and what rate did she spend her money

Apply the distributive property to factor out the greatest common factor. 3 0 + 4 2 = 30+42

Gwen is sending a box to a friend. The box weights 23.5 pounds. Gwen removes a 4.47-pounds book to decrease the shipping cost. What is the new weight of the box?