I'm concerned that you have posted a number of problems showing no work on your part. The first several are really just arithmetic problems. Please show what you have attempted.
Which expression, when evaluated, is less than zero?
7 + 4 • 12
7 – 4 • 12
(7 – 4) •12
(4 – 7) • (–12)
Which property is demonstrated?
(25 • 84) •16 = 25 •(84 •16)
Commutative Property of Addition
Commutative Property of Multiplication
Associative Property of Addition
Associative Property of Multiplication
Combine like terms to simplify the expression.
5 + 7 + 15xy2 + 8y3 + 10x – 13xy2 – 3x – 9y3
–y3 + 2xy2 + 7x + 12
–y6 + 2x2y2 + 10x + 12
–y3 – 2xy2 + 10x + 15
–y3 + 2xy2 + 10x + 1
Use the distributive property and simplify the expression.
–9 – 4(2x + 1) + 8
8x + 3
–8x – 5
–8x – 2
–8x + 3
If a = 4.2, what is the value of a?
4.2
4
4
4.2
List the even integers between 1 and 20 in set notation.
{1, 3, 5, 7, 9, 11, 13, 15, 17, 19}
{3, 5, 7, 9, 11, 13, 15, 17, 19}
{2, 4, 6, 8, 10, 12, 14, 16, 18}
{1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20}
Which property is demonstrated?
a + 6 = 6 + a
Commutative Property of Addition
Commutative Property of Multiplication
Associative Property of Addition
Associative Property of Multiplication
To learn how to work with negative numbers, etc, try:
. . . . .Google results for "negative numbers"
. . . . .Google results for "order of operations"
. . . . .Google results for "simplifying with parentheses"
To learn about number properties and how to recognize them, try:
. . . . .Google results for "number properties"
To learn about polynomials, "like" terms, and addition, try:
. . . . .Google results for "polynomials"
. . . . .Google results for "like terms"
. . . . .Google results for "adding polynomials"
If you get stuck, or if you are unsure of your steps or solutions, please reply showing your work and reasoning so far. Thank you!